CN106685818B - Message feedback method and device - Google Patents

Abstract

The invention discloses a message feedback method and a message feedback device, and belongs to the technical field of communication. The method comprises the following steps: when the first user plane equipment can not provide service, the control plane equipment sends user information corresponding to the first user plane equipment to the second user plane equipment, the second user plane equipment receives a keep-alive message sent by the user equipment, and a confirmation message is fed back to the user equipment according to the user information; when the first user plane equipment recovers from the service incapable of being provided to the service providing state, the control plane equipment sends user information corresponding to the second user plane equipment to the first user plane equipment, the first user plane equipment receives the keep-alive messages sent by the user equipment, and confirmation messages are fed back to the user equipment according to the user information. The invention solves the problem that the user information on the main router needs to be backed up to the standby router in real time in order to keep the user from being disconnected, so that the equipment resources of the standby router are excessively occupied.

Description

Message feedback method and device

technical field

The present invention relates to the field of communication technologies, and in particular, to a message feedback method and device.

Background technique

As shown in FIG. 1 , the broadband access network generally includes: an access switch 110 , a BRAS (Broadband Remote Access Server Control Plane, broadband remote access server) 120 and an uplink network device 130 , and the user equipment 140 passes through the access switch 110 and the BRAS 120 . . The uplink network device 130 is connected to the Internet 150 .

The BRAS 120 usually includes a master router (master) 121 and a backup router (backup) 122. After VRRP (Virtual Router Redundancy Protocol) is configured on the master router 121 and the backup router 122, the master router 121 and the backup router 122 are configured with VRRP (Virtual Router Redundancy Protocol). 122 is virtualized as a router, and this virtual router has a virtual IP (Internet Protocol, protocol for interconnection between networks) address and MAC (Media Access Control, media access control) address, which is perceived by the user equipment 140. The virtual router is not aware of the actual main router 121 and the backup router 122 . Usually, the router with higher VRRP priority among the two routers serves as the master router 121, and the master router 121 implements the real forwarding function. When the master router 121 fails, the backup router 122 acts as the new master router to take over the work of the failed master router 121. In order to ensure fast fault detection, the primary router 121 and the standby router 122 may use the BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection) technology to perform fault detection. The BFD on the main router 121 is bound to the uplink interface, and is used to detect the status of the uplink of the main router 121. The uplink refers to the link between the main router 121 and the uplink network device 130; the standby router 122 The BFD on the main router 121 is bound to the IP of the main router 121 to detect the status of the downlink of the main router 121 , and the downlink refers to the link between the main router 121 and the access switch 110 . After BFD is configured, it will periodically send detection packets to the bound peer end. When BFD detects that the peer end does not respond, the BFD status changes to DOWN, indicating a failure, and then BFD will immediately notify VRRP to perform an active/standby switchover. For example: when the master router 121 detects the failure of the uplink interface through BFD, the BFD state changes to DOWN, and the BFD in the master router 121 notifies the VRRP in the master router 121 to lower the priority of the first VRRP, so that the backup router 122 quickly switches to Master router; when the backup router 122 detects the failure of the master router through BFD, the BFD state changes to DOWN, and the BFD in the backup router 122 notifies the VRRP in the backup router 122 to increase the priority of the second VRRP, so that the backup router 122 quickly switches to the master router router. The first VRRP priority is the VRRP priority of the master router, and the second VRRP priority is the VRRP priority of the standby router.

After the user equipment 140 goes online, the keep-alive message is used to keep the online state. When the BRAS 120 performs an active/standby switchover, the BRAS 120 receives the keep-alive message reported by the user equipment 140, and the standby router 122 needs to find the user information corresponding to the user equipment 140 when receiving the keep-alive message reported by the user equipment 140. , confirm that the user equipment 140 is online, and then feed back a confirmation message to the user equipment 140, so as to ensure that the user equipment 140 does not go offline during the master-standby switchover. In the prior art, after the user equipment 140 goes online through the main router 121, the user information on the main router 121 is synchronized to the standby router 122 in real time. When the main router 121 fails, the standby router 122 will immediately switch to the new main router. Since the user information of the user equipment 140 is synchronized in the standby router 122, the standby router 122 can feed back a confirmation message after receiving the keep-alive message of the user equipment 140, so that the user equipment 140 is not disconnected.

In order to keep users from being disconnected, the user information on the main router 121 needs to be backed up to the standby router 122 in real time, so that when the main router 121 fails, it can immediately switch to the standby router 122 to continue working. However, real-time backup will occupy the standby router too much. 122 device resources.

SUMMARY OF THE INVENTION

In order to solve the problem in the prior art that the user information on the main router needs to be backed up to the standby router in real time, resulting in excessive occupation of equipment resources of the standby router, embodiments of the present invention provide a message feedback method and device. The technical solution is as follows:

In a first aspect, a packet feedback method is provided. The packet feedback method is applied to a second user plane device. When the first user plane device is upgraded or a link to which the first user plane device belongs is faulty, the first user plane device is faulty. When the plane device cannot provide the service, the second user plane device obtains the user information corresponding to the first user plane device from the control plane device. After the second user plane device obtains the user information, the second user plane device communicates with the received user equipment. The sent keep-alive message responds, and an acknowledgement message is sent back to the user equipment. Wherein, the state of the second user plane device when the first user plane device provides services is a standby state, and the first user plane device and the second user plane device are used to implement user dial-up message upload, reception of forwarding entries, and user Traffic forwarding, and the control plane device is used to implement user access protocol processing and user management.

When the first user plane device cannot provide services, the second user plane device obtains the user information corresponding to the first user plane device from the control plane device, and feeds back a confirmation message to the user equipment that sent the keep-alive message according to the user information. The second user plane device does not need to back up the user information of the first user plane device in real time, that is, the user plane device in the standby state does not need to back up the user information of the user plane device in the main state in real time, so it will not generate too many users occupying the standby state. face device resource problems.

In addition, after receiving the user information, the second user plane device can feed back a confirmation message to the user equipment that sent the keep-alive message according to the user information, so that when the first user plane device cannot provide services, the user equipment can pass The second user plane device continues to go online.

In a first possible implementation manner of the first aspect, the first user plane device cannot provide services due to an upgrade, and the second user plane device receives the first user plane delivered by the control plane device when the first user plane device is upgraded User information corresponding to the device. The upgrade here includes a predetermined duration before the upgrade and an upgrade process, and the predetermined duration is at least greater than the duration for the second user plane device to receive the user information delivered by the control plane device.

Since the first user plane device cannot provide services during the upgrade, when the first user plane device is upgraded, the second user plane device receives the user information corresponding to the first user plane device delivered by the control plane device, so that the first user plane device can During the upgrade process of the plane device, it can take over the forwarding work of the user traffic by the first user plane device. Because the second user plane device receives the user information delivered by the control plane device before the first user plane device is upgraded, and the predetermined time period is longer than the time period for which the control plane device delivers the user information, the first user plane device During the upgrade process, the user information has been stored in the second user plane device, and it can respond to the message sent by the user equipment, so that the user equipment will not be disconnected during active/standby switching.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, when the first user plane device is upgraded, the second user plane device acquires the first user from the control plane device After the user information corresponding to the plane device is stored, the second user plane device switches the VRRP state of the second user plane device from the standby state to the main state in two ways. The first way is that the second user plane device receives the priority increase command sent by the control plane device, and increases the second VRRP priority of the second user plane device according to the priority increase command; the second way is to receive the first user plane device. The first VRRP priority sent by the device, where the first VRRP priority is that after the first user plane device receives the priority reduction command sent by the control plane device, the original first VRRP of the first user plane device is changed according to the priority reduction command. Obtained after lowering the priority. After the first user plane device and the second user plane device exchange VRRP advertisement messages, it is determined that the second VRRP priority of the second user plane device is higher than the first VRRP priority of the first user plane device, then the second The VRRP state of the user plane device is switched from the standby state to the active state.

Because the second user plane device only receives the priority increase command sent by the control plane device method after receiving the user information corresponding to the first user plane device, or receives the first user plane device to reduce the priority according to the priority reduction command. A VRRP priority, then the VRRP state of the second user plane device is switched from the standby state to the main state, and the second user plane device takes over the first user plane device and continues to provide services, so that there are already users in the second user plane device during the switchover. information, so that there is no situation in which user traffic is discarded during handover because there is no user information in the second user plane device.

With reference to the first aspect, the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in the third possible implementation manner, when the first user plane device is upgraded, the The second user plane device switches the VRRP state of the second user plane device from the main state to the standby state in two ways. The first method is that the second user plane device receives the priority reduction command sent by the control plane device, and reduces the second VRRP priority of the second user plane device according to the priority reduction command; the second method is to receive the first user plane device. The first VRRP priority sent by the device, where the first VRRP priority is obtained after the first user plane device increases the first VRRP priority of the first user plane device according to the priority increase command sent by the control plane device. After the first user plane device and the second user plane device exchange VRRP advertisement messages, it is determined that the first VRRP priority of the first user plane device is higher than the second VRRP priority of the second user plane device, then the second The VRRP state of the user plane device is switched from the active state to the standby state. The second user plane device receives the priority reduction command sent by the control plane device, or the first user plane device receives the priority increase command sent by the control plane device, both of which are received after the first user plane device is upgraded. Executed after the user information delivered by the control plane device.

After the upgrade of the first user plane device is completed, after the first user plane device receives the user information, the control plane device issues a priority increase command to the first user plane device, or issues a priority to the second user plane device. The lowering command, so that after the upgrade of the first user plane device is completed, the VRRP state of the second user plane device is switched from the main state to the standby state only when user information is stored in the first user plane device. The VRRP state of the plane device is switched from the standby state to the main state, and the first user plane device takes over the second user plane device to continue to provide services, so that the first user plane device already has user information during the handover. There is no user information in the first user plane device, so that user traffic is discarded.

In combination with the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in the fourth possible implementation , when the first user plane device cannot provide services due to a failure of the link where the first user plane device is located, the VRRP state of the second user plane device is switched from the standby state to the main state, and a VRRP state switching notification is sent to the control plane device, Then, the user information corresponding to the first user plane device delivered by the control plane device is received. The user information is sent after the control plane device receives the VRRP state switching notification sent by the second user plane device.

When the link on which the first user plane device is located fails, the VRRP state of the second user plane device is switched from the standby state to the main state, and a state switching notification is sent to the control plane device to request to deliver user information. When one user plane device cannot provide services, the second user plane device can continue to provide services, so as to realize the forwarding of user traffic.

In combination with the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, or the fourth possible implementation of the first aspect Implementation mode, in a fifth possible implementation manner, when the second user plane device detects that the first user plane device or the downlink of the first user plane device occurs through BFD, the second user plane device automatically increases the number of the second user plane device. Two VRRP priorities, so that the second VRRP priority is higher than the first VRRP priority of the first user plane device, and then the second user plane device switches the VRRP state from the standby state to the main state; when the first user plane device passes BFD When detecting that the uplink of the first user plane device fails, the first user plane device lowers the first VRRP priority by itself, so that the first VRRP priority is lower than the second VRRP priority of the second user plane device, and then the first VRRP priority is lower than the second VRRP priority of the second user plane device. The second user plane device receives the reduced first VRRP priority, and switches the VRRP state of the second user plane device from the standby state to the main state.

Because when the uplink of the first user plane device fails, the first user plane device can detect the uplink failure through BFD and lower the priority of the first VRRP by itself. When the downlink of the device fails, the second user plane device can detect the downlink failure of the first user plane device or the first user plane device through BFD, and automatically increase the priority of the second VRRP, and finally make the first VRRP The priority is lower than the second VRRP priority, so that the VRRP state of the second user plane device is switched from the standby state to the main state, and the first user plane device continues to provide services.

Combining the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible implementation of the first aspect Implementation manner or the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner, when the first user plane device cannot provide the service, the second user plane device receives the keep-alive sent by the user equipment. When sending a message, query whether the user information corresponding to the keep-alive message is stored. If it exists, the second user plane device sends a confirmation message to the user equipment that sent the keep-alive message according to the user information; The second user plane device sends the keep-alive message to the control plane device, and the control plane device sends a confirmation message to the user equipment according to the user information. After the user equipment goes online, the control plane device stores all the user information of the user equipment, and the user plane device that provides the service stores user information related to user traffic forwarding of the user equipment.

Because when the second user plane device receives the keep-alive message sent by the user equipment, it first checks whether it stores the user information corresponding to the keep-alive message. The keep-alive message is reported to the control plane device for response, so that the user equipment can still receive the confirmation message before the second user plane device receives the user information, so that the user equipment will not be disconnected.

Combining the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible implementation of the first aspect implementation manner, the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, in the seventh possible implementation manner, when the uplink failure of the first user plane device recovers , after the first user plane device detects the recovery of the uplink failure through BFD, it sends first state change information to the control plane device, informing the control plane device that the first user plane device is back to normal and can provide services. After receiving the first state change information, the control plane device delivers the user information corresponding to the second user plane device to the first user plane device, and after the user information is delivered, the control plane device sends the first user plane device to the first user plane device. A handover notification, used to notify the first user plane device to increase the first VRRP priority, so that the first VRRP priority is higher than the second VRRP priority. After receiving the first VRRP priority, the second user plane device The state is switched from the primary state back to the standby state. When the downlink failure of the first user plane device or the first user plane device recovers, the second user plane device detects the recovery of the downlink failure of the first user plane device or the first user plane device through BFD, and reports to the control The plane device sends the second state change information to inform the control plane device that the first user plane device is back to normal. After receiving the second state change information, the control plane device delivers the user corresponding to the second user plane device to the first user plane device. information, after the user information is delivered, the control plane device sends a second handover notification to the second user plane device to notify the second user plane device to lower the second VRRP priority so that the second VRRP priority is lower than the first VRRP priority, the second user plane device switches the VRRP state from the active state to the standby state.

When the link on which the first user plane device is located recovers from a fault, for the uplink of the first user plane device, the first user plane device can detect the fault recovery through BFD. For the first user plane device or the first user plane device When the downlink fails to recover, the second user plane device can detect the failure recovery through BFD, and by notifying the control plane device that the link where the first user plane device is located has recovered from the failure, the control plane device sends the second user plane device to the first user plane device. The user information corresponding to the user plane device is notified after the user information is delivered to the second user plane device to switch from the main state to the standby state, so that when the link where the first user plane device is located is restored, the first user plane device can switch Return to the main state to continue to provide services.

In addition, because the control plane device delivers user information first, and then sends the switching notification, so that the problem of user traffic loss will not occur when the first user plane device switches back to the primary state after failure recovery.

Combining the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible implementation of the first aspect implementation, the fifth possible implementation of the first aspect, the sixth possible implementation of the first aspect, or the seventh possible implementation of the first aspect, in the eighth possible implementation, in The BFDs on the first user plane device and the second user plane device are configured with a delay UP time, and the duration of the delay UP time is longer than the time period for the control plane device to deliver user information to the first user plane device. Among them, UP is a state of the BFD, which means normal. Correspondingly, when a fault occurs, the state of the BFD is DOWN.

By configuring the delay UP time for BFD, when the link where the first user plane device is located recovers from failure, the state of BFD will not be switched to normal immediately, avoiding the situation that the first user plane device has not received user information. When switching back to the main state to provide services, user traffic is lost.

In addition, since the duration of the delayed UP time is longer than the duration of the control plane device delivering the user information, the second user plane device will not switch back to the standby state when the user information is not all delivered to the first user plane device, avoiding The situation in which the first user plane device causes part of user traffic to be lost when providing services is solved.

In a second aspect, a message feedback method is provided. The message feedback method is applied to the first user plane device. When the first user plane device recovers from being unable to provide a service to a state of providing a service, that is, the first user plane device When the link where the link is located returns to normal, the first user plane device obtains user information corresponding to the second user plane device from the control plane device, and when the first user plane device receives the keep-alive message sent by the user equipment, the first user plane device Send a confirmation message to the user equipment that sends the keep-alive message according to the received user information. The state of the first user plane device when the second user plane device provides the service is the standby state, that is, the state of the first user plane device when the first user plane device cannot provide the service is the standby state, and the first user plane device and the first user plane device are in the standby state. The second user plane device is used to implement user dial-up message uploading, reception of forwarding entries, and user traffic forwarding, and the control plane device is used to implement user access protocol processing and user management.

When the first user plane device recovers from being unable to provide services to providing services, the first user plane device obtains user information corresponding to the second user plane device from the control plane device, and sends the keep-alive message to the user equipment according to the user information. The confirmation message is fed back, because the first user plane device does not need to back up the user information of the second user plane device in real time when it cannot provide services, that is, the user plane device in the standby state does not need to back up the user information of the user plane device in the main state in real time. Therefore, the problem of excessively occupying the resources of the user plane equipment in the standby state will not arise.

In addition, after receiving the user information, the first user plane device can feed back a confirmation message to the user equipment that sent the keep-alive message according to the user information, so that when the first user plane device resumes providing services, the user equipment can pass The first user plane device continues to go online.

In a first possible implementation manner of the second aspect, when the first user plane device is upgraded, the first user plane device switches the VRRP state of the first user plane device from the standby state to the main state in two ways. The first method is that the first user plane device receives the priority increase command sent by the control plane device, and increases the first VRRP priority of the first user plane device according to the priority increase command; the second method is to receive the second user plane device. The second VRRP priority sent by the device, where the second VRRP priority is obtained after the second user plane device lowers the second VRRP priority of the second user plane device according to the priority lowering command sent by the control plane device. After the first user plane device and the second user plane device exchange VRRP advertisement messages, it is determined that the first VRRP priority of the first user plane device is higher than the second VRRP priority of the second user plane device, then the first The VRRP state of the user plane device is switched from the standby state to the active state. The first user plane device receives the priority increasing command sent by the control plane device, or the second user plane device receives the priority decreasing command sent by the control plane device, both of which are received after the first user plane device is upgraded. Executed after the user information delivered by the control plane device.

After the upgrade of the first user plane device is completed, after the first user plane device receives the user information, the control plane device issues a priority increase command to the first user plane device, or issues a priority to the second user plane device. The lowering command, so that after the upgrade of the first user plane device is completed, the VRRP state of the first user plane device is switched from the standby state to the main state only when the user information is stored in the first user plane device, and the second user The VRRP state of the plane device is switched from the main state to the standby state, and the first user plane device takes over the second user plane device to continue to provide services, so that the first user plane device already has user information during the handover, so there will be no There is no user information in the first user plane device, so that user traffic is discarded.

With reference to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, when the first user plane device is upgraded, the second user plane device acquires the first user from the control plane device After the user information corresponding to the plane device is stored, the first user plane device switches the VRRP state of the first user plane device from the main state to the standby state in two ways. The first method is that the first user plane device receives the priority reduction command sent by the control plane device, and reduces the first VRRP priority of the first user plane device according to the priority reduction command; the second method is to receive the second user plane device. The second VRRP priority sent by the device, where the second VRRP priority is that after the second user plane device receives the priority increase command sent by the control plane device, according to the priority increase command, the original second VRRP of the second user plane device is changed. Obtained after the priority has been raised. After the first user plane device and the second user plane device exchange VRRP advertisement messages, it is determined that the second VRRP priority of the second user plane device is higher than the first VRRP priority of the first user plane device. The VRRP state of the user plane device is switched from the active state to the standby state.

Because the second user plane device only receives the priority increase command sent by the control plane device method after receiving the user information corresponding to the first user plane device, or receives the first user plane device to reduce the priority according to the priority reduction command. A VRRP priority, and then the VRRP state of the first user plane device is switched from the main state to the standby state, and the second user plane device takes over the first user plane device and continues to provide services, so that there are already users in the second user plane device when switching information, so that there is no situation in which user traffic is discarded during handover because there is no user information in the second user plane device.

With reference to the second aspect, the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in the third possible implementation manner, when the uplink of the first user plane device fails During recovery, after detecting that the uplink fault has recovered through BFD, the first user plane device sends first state change information to the control plane device, informing the control plane device that the first user plane device is back to normal and can provide services. After receiving the first state change information, the control plane device delivers the user information corresponding to the second user plane device to the first user plane device, and after the user information is delivered, the control plane device sends the first user plane device to the first user plane device. A switching notification is used to notify the first user plane device to increase the first VRRP priority so that the first VRRP priority is higher than the second VRRP priority, and the first user plane device switches the VRRP state from the standby state to the main state. When the downlink failure of the first user plane device or the first user plane device recovers, the second user plane device detects the recovery of the downlink failure of the first user plane device or the first user plane device through BFD, and reports to the control The plane device sends the second state change information to inform the control plane device that the first user plane device is back to normal. After receiving the second state change information, the control plane device delivers the user corresponding to the second user plane device to the first user plane device. information, after the user information is delivered, the control plane device sends a second handover notification to the second user plane device to notify the second user plane device to lower the second VRRP priority so that the second VRRP priority is lower than the first VRRP priority, when the first user plane device receives the second VRRP priority, it switches the VRRP state of the first user plane device from the standby state to the main state.

When the link on which the first user plane device is located recovers from a fault, for the uplink of the first user plane device, the first user plane device can detect the fault recovery through BFD. For the first user plane device or the first user plane device When the downlink fails to recover, the second user plane device can detect the failure recovery through BFD, and by notifying the control plane device that the link where the first user plane device is located has recovered from the failure, the control plane device sends the second user plane device to the first user plane device. The user information corresponding to the user plane device is notified after the user information is delivered to the first user plane device to switch from the standby state to the main state, so that when the link where the first user plane device is located is restored, the first user plane device can switch over Return to the main state to continue to provide services.

In addition, because the control plane device delivers user information first, and then sends the switching notification, so that the problem of user traffic loss will not occur when the first user plane device switches back to the primary state after failure recovery.

In combination with the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, or the third possible implementation of the second aspect, in the fourth possible implementation , when the first user plane device detects that the uplink of the first user plane device is faulty through BFD, the first user plane device reduces the priority of the first VRRP by itself, so that the priority of the first VRRP is lower than that of the second user plane device Then the first user plane device switches the VRRP state of the first user plane device from the main state to the standby state; the second user plane device detects the first user plane device or the first user plane device through BFD. When the downlink of the device occurs, it automatically increases the second VRRP priority of the second user plane device so that the second VRRP priority is higher than the first VRRP priority of the first user plane device, and then the first user plane device receives When the second VRRP priority is reached, the first user plane device switches the VRRP state from the main state to the standby state.

Because when the uplink of the first user plane device fails, the first user plane device can detect the uplink failure through BFD and lower the priority of the first VRRP by itself. When the downlink of the device fails, the second user plane device can detect the downlink failure of the first user plane device or the first user plane device through BFD, and automatically increase the priority of the second VRRP, and finally make the first VRRP The priority is lower than the second VRRP priority, so that the VRRP state of the first user plane device is switched from the main state to the standby state, so that the second user plane device takes over the first user plane device and continues to provide services.

Combining the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, or the fourth possible implementation of the second aspect Implementation mode, in a fifth possible implementation manner, the BFD on the first user plane device and the second user plane device is configured with a delay UP time, and the duration of the delay UP time is longer than that from the control plane device to the first user plane device. The duration for delivering user information. Among them, UP is a state of the BFD, which means normal. Correspondingly, when a fault occurs, the state of the BFD is DOWN.

By configuring the delay UP time for BFD, when the link where the first user plane device is located recovers from failure, the state of BFD will not be switched to normal immediately, avoiding the situation that the first user plane device has not received user information. When switching back to the main state to provide services, user traffic is lost.

In addition, since the duration of the delayed UP time is longer than the duration of the control plane device delivering the user information, the first user plane device will not switch back to the main state when the user information is not all delivered to the first user plane device, avoiding The situation in which the first user plane device causes part of user traffic to be lost when providing services is solved.

In a third aspect, a message feedback method is provided. The message feedback method is applied to a control plane device. When the first user plane device cannot provide services due to an upgrade or a link failure, the control plane device reports to the second user The plane device sends the user information corresponding to the first user plane device. After the second user plane device receives the user information, when the second user plane information receives the keep-alive message sent by the user equipment, it sends the keep-alive message to the sender according to the user information. The user equipment of the message sends an acknowledgment message; when the first user plane device has been upgraded or recovered from a fault, and returns from being unable to provide services to providing services, the control plane device sends the second user plane device to the first user plane device. After receiving the user information, when the first user plane device receives the keep-alive message sent by the user equipment, it sends an acknowledgement message to the user equipment that sent the keep-alive message according to the user information. . The state of the second user plane device when the first user plane device provides the service is the standby state, the state of the second user plane device when the first user plane device cannot provide the service is the main state, the first user plane device and the second user plane device are in the main state. The two user plane devices are used to implement user dial-up message upload, receive forwarding entries, and user traffic forwarding, and the control plane devices are used to implement user access protocol processing and user management.

When the first user plane device cannot provide services, the control plane device sends the user information corresponding to the first user plane device to the second user plane device, so that the second user plane device can send the keep-alive message to the user equipment according to the user information. Feedback confirmation message, because the second user plane device does not need to back up the user information of the first user plane device in real time, that is, the user plane device in the standby state does not need to back up the user information of the user plane device in the main state in real time, so there will be no real-time backup of user information. The problem of occupying more resources of the user plane equipment in the standby state.

By sending the user information corresponding to the second user plane device to the first user plane device when the first user plane device recovers from the state of being unable to provide services to providing services, the first user plane device can send the user information to the sending guarantee device according to the user information. The user equipment of the live packet feeds back the confirmation message, because the first user plane device does not need to back up the user information of the second user plane device in real time when it cannot provide services, that is, the user plane device in the standby state does not need to backup the users in the main state in real time. user information of the plane device, so there is no problem of excessively occupying the resources of the user plane device in the standby state.

In a first possible implementation manner of the third aspect, when the first user plane device is upgraded, the control plane device performs active/standby switching between the first user plane device and the second user plane device in two ways. The method is that the control plane device sends a priority lowering command to the first user plane device, and the first user plane device lowers the first VRRP priority of the first user plane device after receiving the priority lowering command. , the first VRRP priority is lower than the second VRRP priority of the second user plane device, and the VRRP state of the first user plane device is switched from the main state to the standby state; Sending a priority increase command, the second user plane device increases the second VRRP priority of the second user plane device after receiving the priority increase command. Because the second VRRP priority is increased, the second VRRP priority is higher than that of the first user The first VRRP priority of the plane device, and the VRRP state of the second user plane device is switched from the standby state to the main state. The upgrade here includes a predetermined duration before the upgrade and an upgrade process, and the predetermined duration is at least greater than the duration for the second user plane device to receive the user information delivered by the control plane device.

Since the first user plane device cannot provide services during the upgrade, the control plane device needs to prepare in advance to deliver the user information corresponding to the first user plane device to the second user plane device. The first user plane device sends a priority lowering command or sends a priority increasing command to the second user plane device, so that the first user plane device and the second user plane device perform active/standby switchover, thereby ensuring that the first user plane device is being upgraded , the second user plane device can continue to provide services.

Since the control plane device delivers user information to the second user plane device within a predetermined time period before the first user plane device is upgraded, and the predetermined time period is longer than the time period for the control plane device to issue user information, the first user plane device is upgraded before the first user plane device is upgraded. During the process, the user information has been stored in the second user plane device, and the second user plane device can respond to the message sent by the user device, so that the user device will not be disconnected during the master/slave switchover.

With reference to the third aspect or the first possible implementation manner of the third aspect, in the second possible implementation manner, when the upgrade of the first user plane device is completed, the control plane device updates the first user plane device again in two ways. The device and the second user plane device perform active/standby switchover. The first method is that the control plane device sends a priority increase command to the first user plane device, and the first user plane device increases the first user plane after receiving the priority increase command. The first VRRP priority of the device, because the first VRRP priority is increased, the first VRRP priority is higher than the second VRRP priority of the second user plane device, and the VRRP state of the first user plane device is switched from the standby state to the main state The second way is that the control plane device sends a priority reduction command to the second user plane device, and the second user plane device reduces the second VRRP priority of the second user plane device after receiving the priority reduction command. The VRRP priority is lowered, the second VRRP priority is lower than the first VRRP priority of the first user plane device, and the VRRP state of the second user plane device is switched from the main state to the standby state.

Since the first user plane device can provide services after the upgrade is completed, the control plane device can deliver the user information of the second user plane device to the first user plane device, and after the user information is delivered, send the user information to the first user plane device. Send a priority increase command or send a priority decrease command to the second user plane device, so that the first user plane device and the second user plane device perform active/standby switchover, so that the first user plane device can continue to provide services after the upgrade is complete .

With reference to the third aspect, the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in the third possible implementation manner, the uplink failure of the first user plane equipment When the first user plane device detects an uplink failure through BFD, it will lower the priority of the first VRRP by itself. When the first user plane device or the downlink of the first user plane device fails, the second user plane device passes the When BFD detects that the first user plane device or the downlink of the first user plane device is faulty, it will automatically increase the priority of the second VRRP. The first user plane device and the second user plane device determine the first If the VRRP priority is lower than the second VRRP priority, the second user plane device sends a VRRP state switching notification to the control plane device. After receiving the VRRP state switching notification, the control plane device will send the first user notification to the second user plane device. User information corresponding to the face device.

When the link where the first user plane device is located fails, the first user plane device and the second user plane device will perform active/standby switchover by themselves, and then the second user plane device notifies the control plane device of the VRRP state switching, and controls the The plane device delivers user information corresponding to the first user plane device to the second user plane device, so that when the link where the first user plane device is located fails, the second user plane device can take over the first user plane device and continue to provide services.

In combination with the third aspect, the first possible implementation of the third aspect, the second possible implementation of the third aspect, or the third possible implementation of the third aspect, in the fourth possible implementation , when the first user plane device cannot provide the service, when the second user plane device receives the keep-alive message sent by the user equipment, and finds that the user information corresponding to the keep-alive message does not exist in the second user equipment , the second user plane device reports the keep-alive message to the control plane device for processing, the control plane device receives the keep-alive message of the user equipment sent by the second user plane device, and feeds back a confirmation message to the user equipment according to the user information.

Since the control plane device receives the keep-alive message reported by the second user plane device and responds when the second user plane device finds that it does not store the user information corresponding to the keep-alive message, the second user plane device Before receiving the user information, the user equipment can still receive the confirmation message, so that the user equipment will not be disconnected.

In combination with the third aspect, the first possible implementation of the third aspect, the second possible implementation of the third aspect, the third possible implementation of the third aspect, or the fourth possible implementation of the third aspect In a fifth possible implementation manner, when the uplink failure of the first user plane device recovers, the first user plane device sends the first user plane device to the control plane device after detecting that the uplink failure recovers through BFD. The state change information informs the control plane device that the first user plane device is back to normal and can provide services. After receiving the first state change information, the control plane device delivers the user information corresponding to the second user plane device to the first user plane device, and after the user information is delivered, the control plane device sends the first user plane device to the first user plane device. A handover notification, used to notify the first user plane device to increase the first VRRP priority so that the first VRRP priority is higher than the second VRRP priority. When the downlink failure of the first user plane device or the first user plane device recovers, the second user plane device detects the recovery of the downlink failure of the first user plane device or the first user plane device through BFD, and reports to the control The plane device sends the second state change information to inform the control plane device that the first user plane device is back to normal. After receiving the second state change information, the control plane device delivers the user corresponding to the second user plane device to the first user plane device. information, after the user information is delivered, the control plane device sends a second handover notification to the second user plane device to notify the second user plane device to lower the second VRRP priority so that the second VRRP priority is lower than the first VRRP priority.

When the link on which the first user plane device is located recovers from a fault, for the uplink of the first user plane device, the first user plane device can detect the fault recovery through BFD. For the first user plane device or the first user plane device When the downlink fails to recover, the second user plane device can detect the failure recovery through BFD, and by notifying the control plane device that the link where the first user plane device is located has recovered from the failure, the control plane device sends the second user plane device to the first user plane device. The user information corresponding to the user plane device is notified after the user information is delivered to the second user plane device to switch from the main state to the standby state, so that when the link where the first user plane device is located is restored, the first user plane device can switch Return to the main state to continue to provide services.

In addition, because the control plane device delivers user information first, and then sends the switching notification, so that the problem of user traffic loss will not occur when the first user plane device switches back to the primary state after failure recovery.

In a fourth aspect, a message feedback apparatus is provided. The message feedback apparatus is applied in a second user plane device and includes at least one unit, and each unit of the message feedback apparatus is respectively used to implement the message of the first aspect. Corresponding steps in the text feedback method.

In a fifth aspect, a message feedback device is provided, the message feedback device is applied in the first user plane device, and includes at least one unit, and each unit of the message feedback device is respectively used to implement the message of the second aspect. Corresponding steps in the text feedback method.

In a sixth aspect, a message feedback device is provided. The message feedback device is applied in a control plane device and includes at least one unit, and each unit of the message feedback device is respectively used to implement the message feedback of the third aspect. corresponding steps in the method.

In a seventh aspect, a computer-readable medium is provided, where the computer-readable medium stores instructions for implementing the message feedback methods provided in the first aspect, the second aspect, and the third aspect.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of a broadband access network provided by an embodiment of the present invention;

2A is a schematic diagram of an implementation environment provided by an embodiment of the present invention;

2B is a schematic diagram of the principle of VRRP provided by an embodiment of the present invention;

2C is a schematic diagram of the principle of a BFD provided by an embodiment of the present invention;

3 is a method flowchart of a message feedback method provided by an embodiment of the present invention;

4A is a method flowchart of a message feedback method provided by another embodiment of the present invention;

4B is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

4C is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

4D is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

5A is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

5B is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

5C is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

5D is a method flowchart of a message feedback method provided by still another embodiment of the present invention;

6 is a structural block diagram of a message feedback device provided by an embodiment of the present invention;

7 is a structural block diagram of a message feedback apparatus provided by another embodiment of the present invention;

FIG. 8 is a structural block diagram of a message feedback apparatus provided by still another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

In order to facilitate the understanding of the embodiments of the present invention, the implementation environment involved in the embodiments of the present invention is first described with reference to FIG. 2A .

FIG. 2A is a schematic diagram of an implementation environment provided by an embodiment of the present invention. The implementation environment is a hierarchical network structure. As shown in FIG. 2A , the Internet 150 from the user equipment 140 to the backbone layer passes through the access layer 230 , the aggregation layer 240 and the core layer 250 .

The access layer 230 is the point at which the user equipment 140 is permitted to access the Internet 150 and is located at the edge of the Internet 150 . The convergence layer 240 is the dividing point between the access layer 230 and the core layer 250 , and data processing is usually completed at the convergence layer 240 . Devices in the aggregation layer 240 are all connected to the core layer 250 , and the core layer 250 provides high-speed connections for the devices in the aggregation layer 240 .

Optionally, the implementation environment involves a TIC (Telecommunication Infrastructure Cloud, telecommunication infrastructure cloud) network architecture, and adopts an architecture in which the control plane and the user plane are separated. The TIC network architecture includes TICCore (Telecommunication Infrastructure Cloud Core, telecom infrastructure cloud core node) 210 and TICEdge (Telecommunication Infrastructure Cloud Edge, telecom infrastructure cloud edge node) 220 . A BRAS CP 211 (Control Plane, control plane) is deployed in the TICCore 210 , and a BRAS UP 221 (User Plane, user plane) is deployed in the TIC Edge 220 .

In the BRAS of the prior art, the sending of user dial-up messages, the reception of forwarding entries, the forwarding of user traffic, the processing of user access protocols, and the management of users are implemented by the same device, while the TIC network architecture uses the scenario of control and forwarding separation. The BRAS CP 211 is mainly used to implement user access protocol processing and user management, and the BRAS UP 221 is mainly used to implement user dial-up message upload, forwarding entry reception and user traffic forwarding. Optionally, connected to the TIC Core 210 are a RADIUS (Remote Authentication Dial In User Service, Remote Authentication Dial In User Service) server 212 and a DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) server 213, and the RADIUS server 212 is used for For authentication and accounting for dial-up users, the DHCP server 213 is used to automatically assign IP addresses to network services.

Combining the TIC network architecture and the hierarchical network structure, the TIC Core 210 corresponds to the core layer 250, and the TICEdge 220 corresponds to the aggregation layer 240. After the BRAS CP 211 and the BRAS UP 221 are separated, the BRAS CP 211 is deployed at the core layer 250. The BRAS CP 211 includes at least one control plane device 214 , and the BRAS UP 221 is deployed at the convergence layer 240 .

An access layer switch 231 is configured in the access layer 230 , and the access layer switch 231 is generally used to connect the user equipment 140 . Optionally, an OLT (optical line terminal, optical line terminal) 232 may also be configured in the access layer 230. The OLT 232 is used to connect a terminal device of an optical fiber trunk line. Corresponding to the OLT 232, the user equipment 140 needs to be configured with an ONT ( Optical network terminal) 233, the ONT 233 is connected to the OLT 232.

An aggregation layer switch 241 is configured in the aggregation layer 240 , and the aggregation layer switch 241 is an aggregation point of a plurality of access layer switches 231 .

In the aggregation layer 240, the aggregation layer switch 241 is respectively connected to the first user plane device 222 and the second user plane device 223.

There is an uplink network device 251 in the core layer 250, the first user plane device 222 and the second user plane device 223 in the convergence layer 240 are both connected to the uplink network device 251, and the uplink network device 251 is the transmission device in the core layer 250, The upstream network device 251 is finally connected to the Internet 150 at the backbone layer.

In order to ensure the stability of transmission, each BRAS UP 221 usually includes a first user plane device 222 and a second user plane device 223. When the first user equipment 222 cannot provide services, the second user plane device 223 will replace the first user plane device 223. User plane device 222 provides the service. Optionally, the first user plane device 222 and the second user plane device 223 are routers.

For the first user plane device 222 and the second user plane device 223, it is necessary to realize the separation of physical devices and logical devices. The specific implementation is as follows: the first user plane device 222 and the second user plane device 223 are virtualized as a virtual user plane device by configuring VRRP, and the user equipment 140 perceives the virtual user plane device. User plane device 223 is not aware. With reference to Figure 2B, a schematic diagram of the principle of VRRP is shown. Physically, the user equipment 140 is connected to the access switch 232, the access switch 232 is respectively connected to the first user plane device 222 and the second user plane device 223, and the first user plane device 222 and the second user plane device 223 are connected to Internet 150. After the first user plane device 222 and the second user plane device 223 are configured with VRRP, the first user plane device 222 and the second user plane device 223 are virtualized as a virtual user plane device 224 . Logically, the user equipment 140 is connected to the access switch 232 , the access switch 232 is connected to the virtual user plane device 224 , and the virtual user plane device 224 is connected to the Internet 150 . For example, the IP address of the first user plane device 222 is 10.1.1.2/24, the IP address of the second user plane device 223 is 10.1.1.1/24, the IP address of the virtual user plane device 224 is 10.1.1.10, and the user equipment The IP address of 140 is 10.1.1.3/24, and the IP address of the gateway pointed to by the user equipment 140 is 10.1.1.10, then the user equipment 140 can only perceive the virtual user equipment 224, but cannot perceive the first user plane equipment 222 and the second User plane device 223.

The first user plane device 222 and the second user plane device 223 configured with VRRP will be respectively configured with their own VRRP priorities. Optionally, the value range of the VRRP priority is 0 to 255, and the default value is 100. The VRRP state of a device with a higher VRRP priority among the first user plane device 222 and the second user plane device 223 is the main state, The VRRP state of the lower device is the standby state. When the VRRP priorities of the first user plane device 222 and the second user plane device 223 are changed, the corresponding VRRP states are also switched.

It is assumed that the VRRP state of the first user plane device 222 is the main state, the VRRP state of the second user plane device 223 is the standby state, and the first user plane device 222 whose VRRP state is in the main state periodically sends a message to the second user plane device 223 The VRRP advertisement packet contains the first VRRP priority of the first user plane device 222. After receiving the VRRP advertisement packet, the second user plane device 223 replies to the first user plane device 222 with the second VRRP Priority, when the first user plane device 222 learns that the second VRRP priority is lower than the first VRRP priority, the first user plane device 222 maintains its own VRRP state as the main state; when the first user plane device 222 sends When the first VRRP priority of the second user plane device 223 is lower than the second VRRP priority of the second user plane device 223, when the second user plane device 223 receives the VRRP advertisement message sent by the first user plane device 222, it preempts and becomes the master state, The second VRRP priority is returned to the first user plane device 222, and the first user plane device 222 switches the VRRP state from the main state to the standby state when learning that the second VRRP priority is higher than the first VRRP priority. The interval for sending VRRP advertisement packets is usually 1 second. If the second user plane device 223 does not receive the VRRP advertisement packet sent by the first user plane device 222 within the time period of three VRRP advertisement packets (3 seconds), the The second user plane device 223 determines that the first user plane device 222 is faulty, and automatically switches the VRRP state of the second user plane device 223 from the standby state to the main state.

During initialization, the VRRP priorities of the first user plane device 222 and the second user plane device 223 are manually configured. For example, the first VRRP priority of the first user plane device 222 is configured as 200, and the second user plane device 223 The second VRRP priority is configured as 100. In practical applications, when the first user plane device 222 cannot provide services, lowering the first VRRP priority means lowering the first VRRP priority to be lower than the second VRRP priority, for example, lowering it to 50, and increasing the second VRRP priority The representative increases the second VRRP priority to be greater than the first VRRP priority, for example, to 220.

In order to find the fault of the first user plane device 222 as soon as possible, the BFD technology is used to detect the fault on the first user plane device 222 and the second user plane device 223 . In conjunction with reference to Figure 2C, a schematic diagram of the principle of BFD is shown. The user equipment 140 is connected to the access switch 232, the access switch 232 is connected to the first user plane device 222 and the second user plane device 223 respectively, the first user plane device 222 is connected to the first uplink network device 252, and the second user plane device 252. The device 223 is connected to the second uplink network device 253 , and both the first uplink network device 252 and the second uplink network device 253 are connected to the Internet 150 . When configuring the BFD, the BFD on the first user plane device 222 is bound to the uplink interface, that is, the BFD on the first user plane device 222 is bound to the access interface of the first uplink network device 252, Used to detect the status of the uplink of the first user plane device 222, the uplink refers to the link between the first user plane device 222 and the uplink network device 252; the BFD on the second user plane device 223 and the first The IP address of the user plane device 222 is bound. Since the access switch 232 is connected between the first user plane device 222 and the second user plane device 223, the BFD of the second user plane device 223 is connected to the BFD of the first user plane device 222. IP binding is used to detect the state of the first user plane device 222 or the downlink of the first user plane device 222 , and the downlink refers to the link between the first user plane device 222 and the access switch 232 . After BFD is configured, it will periodically send BFD detection packets to the bound peer, and the peer will reply after receiving the detection packets. If BFD detects that there is no response to the detection packets sent to the peer, the BFD status changes If it is DOWN, it indicates a fault. If the BFD detects that there is a response to the detection packet sent to the peer end, the BFD status changes to UP, indicating normal. For example, the first user plane device 222 sends a detection packet to the access interface of the uplink network device 252. If no response is received, it indicates that the uplink is faulty, the BFD status changes to DOWN, and sends a detection packet to the first user plane device 222. VRRP in the device sends a notification; the BFD of the second user plane device 223 sends a detection packet to the first user plane device 222 through the access switch 232, if no response is received, it means that the first user plane device 222 is faulty or the first user The downlink of the plane device 222 is faulty, the state of the BFD becomes DOWN, and a notification is sent to the VRRP of the second user plane device 223 .

The period for BFD to send detection packets is about 50 milliseconds. If no response is received after three periods (150 milliseconds), BFD considers a fault and sends a notification to VRRP. Since it takes a short time for BFD to detect a fault, it can quickly find the fault and notify VRRP to handle the fault. After the time for failure processing is shortened, the user equipment 140 will not perceive the failure.

In addition, BFD also needs to configure the delay-up time (Delay-up seconds), which is used to reserve a certain time for the control plane device 214 to deliver user information when the fault is recovered. The duration of the user information delivered by the face device. The delivery of user information usually takes more than ten seconds, so the BFD delay UP time can be set to 20 seconds. After the user information is delivered, the BFD switches the state to UP, so that the first user plane device 222 can immediately process the user traffic (or user data packets) switching, thereby avoiding the loss of user traffic.

FIG. 3 is a method flowchart of a message feedback method provided by an embodiment of the present invention. The message feedback method is illustrated in the implementation environment shown in FIG. 2A as an example. As shown in FIG. 3 , the message feedback method includes:

301. When the first user plane device cannot provide the service, the control plane device sends user information corresponding to the first user plane device to the second user plane device.

The first user plane device cannot provide services when it is upgraded, when itself fails, when the uplink fails, or when the downlink fails.

Since the first user plane device cannot provide services, in order to enable the user equipment to access normally, the BRAS UP replaces the primary user plane device from the first user plane device with the second user plane device.

Optionally, the user information includes at least a unique identifier (ID) of the user equipment, an access interface of the user equipment, a VLAN (Virtual Local Area Network, virtual local area network) on the interface device, the MAC address of the user equipment, and the IP address of the user equipment. , where the interface device refers to the access switch, and the access interface refers to the interface on the access switch.

In practical applications, after the user equipment accesses the Internet through the first user plane device, the control plane device stores all user information of the user equipment, and the first user plane device stores user information related to user traffic forwarding, In the initial state of the second user plane device, no user information related to the user device is stored. Therefore, when the first user plane device cannot provide services and user traffic needs to be switched to the second user plane device for forwarding, the control plane device needs to first deliver the user information to the second user plane device, and the second user plane device is receiving The user traffic can be forwarded only after the user information is obtained.

In practical applications, the control plane device may be connected to multiple groups of user plane devices, and a group of user plane devices includes a first user plane device and a second user plane device. Since there are many user plane devices connected to the control plane device, when delivering user information to the second user plane device, the control plane device needs to deliver user information corresponding to the first user plane device. The user information corresponding to the first user plane device refers to user information related to the first user plane device used to implement user traffic forwarding.

302. The second user plane device acquires user information corresponding to the first user plane device from the control plane device.

The control plane device delivers user information corresponding to the first user plane device to the second user plane device, and the second user plane device stores the received user information.

303. The second user plane device receives the keep-alive message sent by the user equipment.

Keep-alive packets are used to request that the user equipment is online.

Optionally, the keep-alive message includes: the ID of the user equipment, keep-alive information, and the like.

After the user equipment goes online, a keep-alive timer is set. If the period of no data interaction reaches the time period of the keep-alive timer, the user equipment sends a keep-alive message, and the user equipment receives an acknowledgment message for feeding back the keep-alive message. When the message is sent, the keep-alive timer is reset. If the user equipment does not receive the confirmation message, the user equipment is disconnected.

304. The second user plane device feeds back a confirmation message to the user equipment according to the user information.

When the second user plane device receives the keep-alive message sent by the user equipment, it needs to look up the user information corresponding to the user equipment to determine whether the user equipment is online. The device sends back a confirmation message.

Since the second user plane device acquires the user information from the control plane device, it can feed back a confirmation message to the user equipment by querying the user information.

305. When the first user plane device recovers from the state of being unable to provide the service to the state of providing the service, the control plane device sends the user information corresponding to the second user plane device to the first user plane device.

Optionally, when the first user plane device is upgraded or the link to which it belongs is recovered from a fault, the first user plane device is restored to a state of providing services.

In a possible situation, since the first user plane device cannot provide services, the user traffic is forwarded through the second user plane device, and the user information during this period is not stored on the first user plane device. Therefore, When the first user plane device resumes providing services, the control plane device needs to send user information corresponding to the second user plane device to the first user plane device.

In another possible situation, data is lost due to an upgrade or failure of the first user plane device. When the first user plane device returns to the state of providing services, the control plane device needs to deliver user information to the first user plane device. .

306. The first user plane device acquires user information corresponding to the second user plane device from the control plane device.

307. The first user plane device receives the keep-alive message sent by the user equipment.

308. The first user plane device feeds back a confirmation message to the user equipment according to the user information.

Since the control plane device delivers user information to the first user plane device, the first user plane device can feed back a confirmation message according to the user information.

To sum up, in the packet feedback method provided by the embodiments of the present invention, when the first user plane device cannot provide services, the second user plane device obtains user information corresponding to the first user plane device from the control plane device, and according to the user The information feeds back a confirmation message to the user equipment that sends the keep-alive message. Since the second user plane device does not need to back up the user information of the first user plane device in real time, that is, the user plane device in the standby state does not need to back up the user plane in the active state in real time. user information of the device, so there is no problem of excessively occupying the resources of the user plane device in the standby state.

In addition, after receiving the user information, the second user plane device can feed back a confirmation message to the user equipment that sent the keep-alive message according to the user information, so that when the first user plane device cannot provide services, the user equipment can pass The second user plane device continues to go online.

When the first user plane device recovers from being unable to provide services to providing services, the first user plane device obtains user information corresponding to the second user plane device from the control plane device, and sends the keep-alive message to the user equipment according to the user information. The confirmation message is fed back, because the first user plane device does not need to back up the user information of the second user plane device in real time when it cannot provide services, that is, the user plane device in the standby state does not need to back up the user information of the user plane device in the main state in real time. Therefore, the problem of excessively occupying the resources of the user plane equipment in the standby state will not arise.

In addition, after receiving the user information, the first user plane device can feed back a confirmation message to the user equipment that sent the keep-alive message according to the user information, so that when the first user plane device resumes providing services, the user equipment can pass The first user plane device continues to go online.

When the first user plane device cannot provide services, the control plane device sends the user information corresponding to the first user plane device to the second user plane device, so that the second user plane device can send the keep-alive message to the user equipment according to the user information. Feedback confirmation message, because the second user plane device does not need to back up the user information of the first user plane device in real time, that is, the user plane device in the standby state does not need to back up the user information of the user plane device in the main state in real time, so there will be no real-time backup of user information. The problem of occupying more resources of the user plane equipment in the standby state.

By sending the user information corresponding to the second user plane device to the first user plane device when the first user plane device recovers from the state of being unable to provide services to providing services, the first user plane device can send the user information to the sending guarantee device according to the user information. The user equipment of the live packet feeds back the confirmation message, because the first user plane device does not need to back up the user information of the second user plane device in real time when it cannot provide services, that is, the user plane device in the standby state does not need to backup the users in the main state in real time. user information of the plane device, so there is no problem of excessively occupying the resources of the user plane device in the standby state.

When the first user plane device cannot provide services due to the upgrade, please refer to the steps shown in FIG. 4A or FIG. 4B for the handover between the first user plane device and the second user plane device and the feedback of the keep-alive message.

When the first user plane device is upgraded and resumes the state of providing services, for the switching between the first user plane device and the second user plane device and the feedback of the keep-alive message, please refer to the steps shown in FIG. 4C or FIG. 4D .

When the uplink of the first user plane device fails, please refer to the steps shown in FIG. 5A for the handover between the first user plane device and the second user plane device and the feedback of the keep-alive message; When the uplink failure of the user plane device is recovered, please refer to the steps shown in FIG. 5B for the handover between the first user plane device and the second user plane device and the feedback of the keep-alive message.

When the downlink of the first user plane device or the first user plane device fails, please refer to FIG. 5C for the handover between the first user plane device and the second user plane device and the feedback of the keep-alive message step; when the downlink of the first user plane device or the first user plane device recovers from a fault, please refer to Fig. Steps shown in 5D.

FIG. 4A is a method flowchart of a message feedback method provided by another embodiment of the present invention. The message feedback method is applied in the implementation environment shown in FIG. 2A as an example. In this embodiment, the first user plane device cannot provide services due to an upgrade. As shown in FIG. 4A , the message feedback method includes:

401. When the first user plane device is upgraded, the control plane device sends user information corresponding to the first user plane device to the second user plane device.

In actual implementation, the upgrade includes a predetermined duration before the upgrade and an upgrade process, and the predetermined duration is at least greater than the duration required for the control plane device to deliver user information to the second user plane device.

It is foreseeable that the first user plane device cannot provide services due to the upgrade of the first user plane device. Therefore, the switching between the first user plane device and the second user plane device is performed accurately in advance, and the control plane device issues user information in advance. to the first user plane device, so that after the handover, the loss of user traffic due to the failure to deliver user information is avoided.

In practical applications, the time required for the control plane device to deliver user information is about ten seconds, and the predetermined time can be set to 20 seconds.

402. The second user plane device receives user information corresponding to the first user plane device delivered by the control plane device.

403a, the control plane device sends a priority reduction command to the first user plane device.

The control device first delivers the user information and then sends the priority reduction instruction, so that when the user traffic is switched to the second user plane device, the user information is already stored in the second user plane device, so that the user traffic can be forwarded, avoiding user traffic. loss of traffic.

In practical applications, the VRRP priority of the first user plane device and the second user plane device are manually set during configuration. For example, the VRRP priority of the first user plane device is 200, and the VRRP priority of the second user plane device is 100. The VRRP state of the user plane device with a higher VRRP priority is the primary state, and the VRRP state of the user plane device with a lower VRRP priority is the standby state.

The priority reduction command is used to instruct the VRRP priority of the first user plane device to be reduced to a lower priority than the VRRP priority of the second user plane device, for example, the VRRP priority of the first user plane device is reduced to 80.

404a: The first user plane device receives a priority reduction command sent by the control plane device.

405a, the first user plane device lowers the first VRRP priority of the first user plane device according to the priority lowering command.

In practical applications, the reduced first VRRP priority of the first user plane device is lower than the second VRRP priority of the second user plane device.

406a. The first user plane device sends the first VRRP priority to the second user plane device.

Since the VRRP priority initially configured on the first user plane device is higher than the VRRP priority of the second user plane device, the VRRP state of the first user plane device is the main state and is capable of sending VRRP advertisement packets. The VRRP advertisement message periodically sent by the first user plane device includes the priority of the first VRRP.

407a, the second user plane device receives the first VRRP priority sent by the first user plane device.

408a: When the first VRRP priority is lower than the second VRRP priority of the second user plane device, the second user plane device switches the VRRP state of the second user plane device from the standby state to the main state.

Since the priority of the first VRRP is lowered, when the priority of the second VRRP is higher than the priority of the first VRRP, the VRRP state of the second user plane device is switched to the main state.

409a, the second user plane device sends the second VRRP priority to the first user plane device.

After receiving the VRRP notification message sent by the first user plane device, the second user plane device replies with the second VRRP priority to the first user plane device.

410a. The first user plane device receives the second VRRP priority sent by the second user plane device.

411a, when the first VRRP priority is lower than the second VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the main state to the standby state.

After receiving the second VRRP priority returned by the second user plane device, the first user plane device in the original VRRP state determines that the first VRRP priority is lower than the second VRRP priority, thereby changing the VRRP state from the master state. The state switches to the standby state.

Alternatively, steps 403a to 411a may be replaced with steps 403b to 411b shown in FIG. 4B .

403b, the control plane device sends a priority increase command to the second user plane device.

The priority increase command is used to instruct the VRRP priority of the second user plane device to be higher than the VRRP priority of the first user plane device, for example, the VRRP priority of the second user plane device is increased to 220.

404b, the second user plane device receives the priority increase command sent by the control plane device.

405b, the second user plane device increases the second VRRP priority of the second user plane device according to the priority increasing command.

The purpose of increasing the second VRRP priority of the second user plane device and decreasing the first VRRP priority of the first user plane device is the same, both are to make the first VRRP priority smaller than the second VRRP priority.

406b, the first user plane device sends the first VRRP priority of the first user plane device to the second user plane device.

407b, the second user plane device receives the first VRRP priority sent by the first user plane device.

408b. When the first VRRP priority is lower than the second VRRP priority of the second user plane device, the second user plane device switches the VRRP state of the second user plane device from the standby state to the main state.

Since the second VRRP priority of the second user plane device is increased, when the second VRRP priority is higher than the first VRRP priority, the VRRP state of the second user plane device is switched to the main state.

409b, the second user plane device sends the second VRRP priority to the first user plane device.

410b, the first user plane device receives the second VRRP priority sent by the second user plane device.

411b, when the first VRRP priority is lower than the second VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the main state to the standby state.

412. The second user plane device receives the keep-alive message sent by the user equipment.

413. The second user plane device feeds back a confirmation message to the user equipment according to the user information.

After receiving the user information delivered by the control plane device, the second user plane device may respond to the keep-alive message according to the user information, and feed back a confirmation message.

FIG. 4C is a method flowchart of a message feedback method provided by still another embodiment of the present invention. The message feedback method is applied in the implementation environment shown in FIG. 2A as an example. In this embodiment, the first user plane device resumes providing a service state after the upgrade is completed. As shown in FIG. 4C , the message feedback method includes:

414. When the upgrade of the first user plane device is completed, the control plane device sends the user information corresponding to the second user plane device to the first user plane device.

After the first user plane device is upgraded, the first user plane device can continue to provide services.

During the upgrade of the first user plane device, user traffic is forwarded through the second user plane device, so the first user plane device may not store the corresponding user information, or the first user plane device may cause all user information data due to the upgrade. is lost, so the control plane device needs to deliver the user information corresponding to the second user plane to the first user plane device.

415. The first user plane device receives the user information sent by the control plane device.

416a. The control plane device sends a priority increase command to the first user plane device.

The control plane device first delivers the user information, and then sends the priority raising command to instruct the VRRP state to switch, so that when the user traffic is switched back to the first user plane device, the user traffic will not be lost because the user information is not delivered.

In actual implementation, the real forwarding function is usually realized by the user plane device in the VRRP state as the main state. Therefore, when the first user plane device resumes providing the service state, the VRRP state of the first user plane device needs to be switched to the main state first. , the VRRP state of the first user plane device is switched to the main state, and the first VRRP priority is greater than the second VRRP priority, so the control plane device sends a priority increase command to the first user plane device to increase the first VRRP priority.

417a: The first user plane device receives the priority increase command sent by the control plane device.

418a. The first user plane device increases the first VRRP priority of the first user plane device according to the priority increasing command.

419a. The second user plane device sends the second VRRP priority to the first user plane device.

During the upgrade of the first user plane device, the VRRP state of the second user plane device is the main state. Therefore, the second user plane device sends a VRRP advertisement packet to the first user plane device. The VRRP advertisement packet carries the second VRRP priority. class.

420a. The first user plane device receives the second VRRP priority sent by the second user plane device.

421a. When the first VRRP priority is higher than the second VRRP priority of the second user plane device, the first user plane device switches the VRRP priority of the first user plane device from the standby state to the main state.

422a. The first user plane device sends the first VRRP priority to the second user plane device.

423a. The second user plane device receives the first VRRP priority sent by the first user plane device.

424a. When the first VRRP priority is higher than the second VRRP priority, the second user plane device switches the VRRP state of the second user plane device from the main state to the standby state.

Alternatively, steps 416a to 424a may be replaced with steps 416b to 424b shown in FIG. 4D .

416b, the control plane device sends a priority reduction command to the second user plane device.

The purpose of lowering the second VRRP priority of the second user plane device is the same as increasing the first VRRP priority of the first user plane device, both are to make the second VRRP priority lower than the first VRRP priority, so that The VRRP state of the first user plane device is switched to the main state.

417b, the second user plane device receives the priority reduction command sent by the control plane device.

418b, the second user plane device lowers the second VRRP priority according to the priority lowering command.

419b, the second user plane device sends the second VRRP priority to the first user plane device.

420b, the first user plane device receives the second VRRP priority sent by the second user plane device.

421b, when the second VRRP priority is lower than the first VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the standby state to the main state.

422b, the first user plane device sends the first VRRP priority to the second user plane device.

423b, the second user plane device receives the first VRRP priority sent by the first user plane device.

424b, when the second VRRP priority is lower than the first VRRP priority, the second user plane device switches the VRRP state of the second user plane device from the main state to the standby state.

425. The first user plane device receives the keep-alive message sent by the user equipment.

After the VRRP state is switched to the main state, the first user plane device provides a service of user traffic forwarding, so the first user plane device can receive the keep-alive message sent by the user equipment.

426. The first user plane device feeds back a confirmation message to the user equipment according to the user information.

Since the first user plane device receives the user information delivered by the control plane device, the first user plane device can feed back a confirmation message to the user equipment according to the user information.

To sum up, in the packet feedback method provided by the embodiment of the present invention, since the first user plane device cannot provide services during the upgrade, the second user plane device receives the data sent by the control plane device when the first user plane device is upgraded. The user information corresponding to the first user plane device, so that the first user plane device can take over for the first user plane device to perform user traffic forwarding during the upgrade process of the first user plane device. Because the second user plane device receives the user information delivered by the control plane device before the first user plane device is upgraded, and the predetermined time period is longer than the time period for which the control plane device delivers the user information, the first user plane device During the upgrade process, the user information has been stored in the second user plane device, and it can respond to the message sent by the user equipment, so that the user equipment will not be disconnected during active/standby switching.

Because the second user plane device only receives the priority increase command sent by the control plane device method after receiving the user information corresponding to the first user plane device, or receives the first user plane device to reduce the priority according to the priority reduction command. A VRRP priority, then the VRRP state of the second user plane device is switched from the standby state to the main state, and the second user plane device takes over the first user plane device and continues to provide services, so that there are already users in the second user plane device during the switchover. information, so that there is no situation in which user traffic is discarded during handover because there is no user information in the second user plane device.

After the upgrade of the first user plane device is completed, after the first user plane device receives the user information, the control plane device issues a priority increase command to the first user plane device, or issues a priority to the second user plane device. The lowering command, so that after the upgrade of the first user plane device is completed, the VRRP state of the second user plane device is switched from the main state to the standby state only when user information is stored in the first user plane device. The VRRP state of the plane device is switched from the standby state to the main state, and the first user plane device takes over the second user plane device to continue to provide services, so that the first user plane device already has user information during the handover. There is no user information in the first user plane device, so that user traffic is discarded.

After the upgrade of the first user plane device is completed, after the first user plane device receives the user information, the control plane device issues a priority increase command to the first user plane device, or issues a priority to the second user plane device. The lowering command, so that after the upgrade of the first user plane device is completed, the VRRP state of the first user plane device is switched from the standby state to the main state only when the user information is stored in the first user plane device, and the second user The VRRP state of the plane device is switched from the main state to the standby state, and the first user plane device takes over the second user plane device to continue to provide services, so that the first user plane device already has user information during the handover, so there will be no There is no user information in the first user plane device, so that user traffic is discarded.

Because the second user plane device only receives the priority increase command sent by the control plane device method after receiving the user information corresponding to the first user plane device, or receives the first user plane device to reduce the priority according to the priority reduction command. A VRRP priority, and then the VRRP state of the first user plane device is switched from the main state to the standby state, and the second user plane device takes over the first user plane device and continues to provide services, so that there are already users in the second user plane device when switching information, so that there is no situation in which user traffic is discarded during handover because there is no user information in the second user plane device.

Since the first user plane device cannot provide services during the upgrade, the control plane device needs to prepare in advance to deliver the user information corresponding to the first user plane device to the second user plane device. The first user plane device sends a priority lowering command or sends a priority increasing command to the second user plane device, so that the first user plane device and the second user plane device perform active/standby switchover, thereby ensuring that the first user plane device is being upgraded , the second user plane device can continue to provide services.

Since the control plane device delivers user information to the second user plane device within a predetermined time period before the first user plane device is upgraded, and the predetermined time period is longer than the time period for the control plane device to issue user information, the first user plane device is upgraded before the first user plane device is upgraded. During the process, the user information has been stored in the second user plane device, and the second user plane device can respond to the message sent by the user device, so that the user device will not be disconnected during the master/slave switchover.

Since the first user plane device can provide services after the upgrade is completed, the control plane device can deliver the user information of the second user plane device to the first user plane device, and after the user information is delivered, send the user information to the first user plane device. Send a priority increase command or send a priority decrease command to the second user plane device, so that the first user plane device and the second user plane device perform active/standby switchover, so that the first user plane device can continue to provide services after the upgrade is complete .

FIG. 5A is a method flowchart of a message feedback method provided by still another embodiment of the present invention. The packet feedback method is used in the implementation environment shown in FIG. 2A as an example. In this embodiment, the first user plane device cannot provide services due to an uplink failure. As shown in FIG. 5A , the packet feedback method includes: :

501. After detecting an uplink failure through BFD, the first user plane device lowers the first VRRP priority of the first user plane device.

Since the BFD of the first user plane device is bound to the uplink interface, when the first user plane device sends a detection packet through the BFD and receives no response, it indicates that the uplink is faulty. After BFD detects a fault, the BFD status changes to DOWN, and BFD communicates with VRRP. VRRP learns that the uplink is faulty and lowers the priority of the first VRRP by itself, so that user traffic is switched to the second user plane device.

In practical applications, through BFD fault detection, user traffic can be quickly switched to the second user plane equipment, so that the user equipment cannot perceive it.

502. The first user plane device sends the first VRRP priority to the second user plane device.

503. The second user plane device receives the first VRRP priority sent by the first user plane device.

504. When the first VRRP priority is lower than the second VRRP priority of the second user plane device, the second user plane device switches the VRRP state of the second user plane device from the standby state to the main state.

Due to the uplink failure of the first user plane device, the first user plane device cannot continue to provide services. Therefore, the VRRP state of the second user plane device needs to be switched to the main state, and the second user plane device takes over the first user plane device. Provide services.

505. The second user plane device sends the second VRRP priority to the first user plane device.

506. The first user plane device receives the second VRRP priority sent by the second user plane device.

507. When the first VRRP priority is lower than the second VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the main state to the standby state.

508. The second user plane device sends a VRRP state switching notification to the control plane device.

509. The control plane device receives the VRRP state switching notification sent by the second user plane device.

510. The control plane device delivers user information corresponding to the first user plane device to the second user plane device.

511. The second user plane device receives user information corresponding to the first user plane device delivered by the control plane device.

512. The second user plane device receives the keep-alive message sent by the user equipment.

513. The second user plane device queries whether there is user information corresponding to the keep-alive message in the second user plane device.

Since it takes more than ten seconds for the control plane device to deliver user information, and the control plane device may deliver user information in multiple times, when the BFD detects a fault, the second user plane device only needs more than 100 milliseconds. It can be switched to the main state, so the second user plane device may not have received user information or all user information has not yet been received.

514. When the user information corresponding to the keep-alive message exists in the second user plane device, the second user plane device feeds back a confirmation message to the user equipment.

If the user information corresponding to the keep-alive message has just been received in the second user plane device, the second user plane device may feed back a confirmation message to the user equipment sending the keep-alive message according to the user information.

515. When the user information corresponding to the keep-alive message does not exist in the second user plane device, the second user plane device sends a keep-alive message to the control plane device.

If the user information corresponding to the keep-alive message does not exist in the second user plane device, the second user plane device cannot respond to the keep-alive message. If the second user plane device discards the keep-alive message, the corresponding user The device will be dropped.

The control plane device stores all user information. In order to prevent the user equipment from being disconnected, the second user plane device reports the keep-alive message to the control plane device, and the control plane device responds to the keep-alive message according to the user information. , so that the user equipment will not be dropped when the uplink fails.

516. The control plane device receives the keep-alive message sent by the second user plane device.

517. The control plane device feeds back a confirmation message to the user equipment according to the stored user information.

FIG. 5B is a method flowchart of a message feedback method provided by still another embodiment of the present invention. The packet feedback method is applied in the implementation environment shown in FIG. 2A as an example. In this embodiment, the first user plane device can normally provide services due to uplink fault recovery. As shown in FIG. 5B , the packet feedback method include:

518 , when the first user plane device detects that the uplink fault of the first user plane device has recovered through BFD, sends the first state change information to the control plane device.

When the first user plane device sends a detection packet to the uplink interface through BFD and receives a response, it indicates that the uplink fault has recovered.

In practical applications, when BFD detects that the fault has recovered, the BFD state will immediately switch to UP, indicating normal, BFD communicates with VRRP, and VRRP will soon switch the VRRP state of the first user plane device to the main state. However, since it takes a certain period of time for the control plane device to deliver user information, if the VRRP state of the first user plane device quickly switches to the main state, but the first user plane device has not yet received user information, some user traffic will be lost. , so the BFD is configured with a delay UP time, and the delay UP time should be longer than the time for the control plane device to deliver the user information, so that the VRRP state of the first user plane device cannot be switched to the main state before all the user information is delivered. , to avoid the loss of user traffic.

519. The control plane device receives the first state change information sent by the first user plane device.

When the first user plane device detects that the uplink fault has recovered through BFD, the first user plane device informs the control plane device through the first state change information that the first user plane device is about to perform VRRP state switching, so that the control plane device can timely The user information is delivered to the first user plane device.

The first state change information includes at least the IP address of the first user plane device, and the control plane device searches for corresponding user information through the first state change information.

520. The control plane device sends the user information corresponding to the second user plane device to the first user plane device.

After finding the user information required by the first user plane device, the control plane device delivers the user information to the first user plane device.

521. The first user plane device receives user information corresponding to the second user plane device that is delivered by the control plane device according to the first state change information.

522. After the user information is delivered, the control plane device sends a first handover notification to the first user plane device, where the first handover notification is used to increase the first VRRP priority of the first user plane device.

After the user information is delivered, the control plane device sends a first handover notification to the first user plane device, and increases the first VRRP priority through the first handover notification, so that the VRRP state of the first user plane device is switched to the main state.

In practical applications, the time when the control plane device sends the first handover notification is earlier than the BFD delay UP time. Since the BFD delay UP time is longer than the time for the control plane device to deliver user information and send the first handover notification, the VRRP state switching is based on the time when the first user plane device receives the first handover notification sent by the control plane device.

523. The first user plane device receives the first handover notification sent by the control plane device.

524. The first user plane device increases the first VRRP priority of the first user plane device according to the first handover notification.

525. The second user plane device sends the second VRRP priority to the first user plane device.

526. The first user plane device receives the second VRRP priority sent by the second user plane device.

527. When the first VRRP priority is higher than the second VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the standby state to the main state.

528. The first user plane device sends the first VRRP priority to the second user plane device.

529. The second user plane device receives the first VRRP priority sent by the first user plane device.

530. When the first VRRP priority is higher than the second VRRP priority, the second user plane device switches the VRRP state of the second user plane device from the main state to the standby state.

531. The first user plane device receives the keep-alive message sent by the user equipment.

532. The first user plane device feeds back a confirmation message to the user equipment according to the user information.

FIG. 5C is a method flowchart of a message feedback method provided by still another embodiment of the present invention. The packet feedback method is applied in the implementation environment shown in FIG. 2A as an example. In this embodiment, the first user plane device cannot provide services due to a downlink failure or a failure of the first user plane device, as shown in FIG. 5C . The message feedback method includes:

533. When the second user plane device detects through BFD that the first user plane device or the downlink of the first user plane device is faulty, increase the second VRRP priority of the second user plane device.

The BFD of the second user plane device is bound to the IP address of the first user plane device. If the second user plane device does not receive a response by sending a detection packet through BFD, it indicates that the first user plane device or the first user plane device has an IP address. Downlink failure. The BFD state of the second user plane device changes to DOWN, and communicates with VRRP to inform VRRP to perform state switching.

The second user plane device increases the second VRRP priority by itself, so that the second VRRP priority is higher than the first VRRP priority, so that the VRRP state of the second user plane device is switched to the main state.

534. The second user plane device sends the second VRRP priority to the first user plane device.

535. The first user plane device receives the second VRRP priority sent by the second user plane device.

536. When the second VRRP priority is higher than the first VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the main state to the standby state.

When the downlink failure of the first user plane device causes the communication between the first user plane device and the second user plane device to fail through VRRP advertisement packets, steps 534 to 536 may not be executed, and step 537 is directly executed, and the The VRRP state of the second user plane device is switched from the standby state to the active state.

537. When the first VRRP priority is lower than the second VRRP priority, the second user plane device switches the VRRP state of the second user plane device from the standby state to the main state.

Optionally, when the second VRRP priority of the second user plane device is increased, the VRRP state of the second user plane device is switched from the standby state to the main state.

Optionally, when the second user plane device receives the first VRRP priority, and the first VRRP priority is lower than the second VRRP priority, the VRRP state of the second user plane device switches from the standby state to the main state.

Optionally, when the second user plane device does not receive the VRRP advertisement packet sent by the first user plane device within 3 packet periods of the VRRP advertisement packet, the VRRP state of the second user plane device is switched from the standby state to the standby state. main state.

538. The second user plane device sends a VRRP state switching notification to the control plane device.

539. The control plane device receives the VRRP state switching notification sent by the second user plane device.

540. The control plane device delivers user information corresponding to the first user plane device to the second user plane device.

541. The second user plane device receives user information corresponding to the first user plane device delivered by the control plane device.

542. The second user plane device receives the keep-alive message sent by the user equipment.

543. The second user plane device queries whether there is user information corresponding to the keep-alive message in the second user plane device.

Since it takes more than ten seconds for the control plane device to deliver user information, and the control plane device may deliver user information in multiple times, when the BFD detects a fault, the second user plane device only needs more than 100 milliseconds. It can be switched to the main state, so the second user plane device may not have received user information or all user information has not yet been received.

544. When the user information corresponding to the keep-alive message exists in the second user plane device, the second user plane device feeds back a confirmation message to the user equipment.

If the user information corresponding to the keep-alive message has just been received in the second user plane device, the second user plane device may feed back a confirmation message to the user equipment sending the keep-alive message according to the user information.

545. When the user information corresponding to the keep-alive message does not exist in the second user plane device, the second user plane device sends the keep-alive message to the control plane device.

If the user information corresponding to the keep-alive message does not exist in the second user plane device, the second user plane device cannot respond to the keep-alive message. If the second user plane device discards the keep-alive message, the corresponding user The device will be dropped.

The control plane device stores all user information. In order to prevent the user equipment from being disconnected, the second user plane device reports the keep-alive message to the control plane device, and the control plane device responds to the keep-alive message according to the user information. , so that the user equipment will not be dropped when the downlink or the first user plane equipment fails.

546. The control plane device receives the keep-alive message sent by the second user plane device.

547. The control plane device feeds back a confirmation message to the user equipment according to the stored user information.

FIG. 5D is a method flowchart of a message feedback method provided by still another embodiment of the present invention. The packet feedback method is applied in the implementation environment shown in FIG. 2A as an example. In this embodiment, the first user plane device can normally provide services due to downlink failure recovery or first user plane device failure recovery, as shown in FIG. 5D . As shown, the message feedback method includes:

548. When the second user plane device detects that the first user plane device or the downlink fault of the first user plane device has recovered through BFD, it sends the second state change information to the control plane device.

When the second user plane device sends a detection packet to the first user plane device through BFD and gets a response, it indicates that the first user plane device or the downlink fault of the first user plane device has recovered.

In practical applications, when BFD detects that the fault has recovered, the BFD state will immediately switch to UP, indicating normal, BFD communicates with VRRP, and VRRP will soon switch the VRRP state of the first user plane device to the main state. However, since it takes a certain period of time for the control plane device to deliver user information, if the VRRP state of the first user plane device quickly switches to the main state, but the first user plane device has not yet received user information, some user traffic will be lost. , so the BFD is configured with a delay UP time, and the delay UP time should be longer than the time for the control plane device to deliver the user information, so that the VRRP state of the first user plane device cannot be switched to the main state before all the user information is delivered. , to avoid the loss of user traffic.

549. The control plane device receives the second state change information sent by the second user plane device.

When the second user plane device detects through BFD that the downlink or the first user plane device has recovered from a fault, the second user plane device informs the control plane device through the second state change information that the first user plane device is about to perform VRRP state switching, so that The control plane device can deliver the user information to the first user plane device in time.

The second state change information includes at least the IP address of the first user plane device, and the control plane device searches for corresponding user information through the first state change information.

550. The control plane device sends the user information corresponding to the second user plane device to the first user plane device.

After finding the user information required by the first user plane device, the control plane device delivers the user information to the first user plane device.

551. The first user plane device receives user information corresponding to the second user plane device that is delivered by the control plane device according to the second state change information.

552. After the user information is delivered, the control plane device sends a second handover notification to the second user plane device, where the second handover notification is used to reduce the second VRRP priority of the second user plane device.

After the user information is delivered, the control plane device sends a second handover notification to the second user plane device, and reduces the second VRRP priority through the second handover notification, so that the VRRP state of the second user plane device is switched to the standby state.

In practical applications, the time at which the control plane device sends the second handover notification is earlier than the BFD delay UP time. Since the BFD delay UP time is longer than the time for the control plane device to deliver user information and send the second handover notification, the VRRP state switching is based on the time when the second user plane device receives the second handover notification sent by the control plane device.

553. The second user plane device receives the second handover notification sent by the control plane device.

554. The second user plane device reduces the second VRRP priority of the second user plane device according to the second handover notification.

555. The second user plane device sends the second VRRP priority to the first user plane device.

556. The first user plane device receives the second VRRP priority sent by the second user plane device.

557. When the first VRRP priority is higher than the second VRRP priority, the first user plane device switches the VRRP state of the first user plane device from the standby state to the primary state.

558. The first user plane device sends the first VRRP priority to the second user plane device.

559. The second user plane device receives the first VRRP priority sent by the first user plane device.

560. When the first VRRP priority is higher than the second VRRP priority, the second user plane device switches the VRRP state of the second user plane device from the main state to the standby state.

561. The first user plane device receives the keep-alive message sent by the user equipment.

562. The first user plane device feeds back a confirmation message to the user equipment according to the user information.

To sum up, in the packet feedback method provided by the embodiment of the present invention, when the link where the first user plane device is located fails, the VRRP state of the second user plane device is switched from the standby state to the main state, and the control plane is sent to the control plane. The device sends a state switching notification requesting to issue user information, so that when the first user plane device cannot provide services due to a fault, the second user plane device can continue to provide services and forward user traffic.

Because when the uplink of the first user plane device fails, the first user plane device can detect the uplink failure through BFD and lower the priority of the first VRRP by itself. When the downlink of the device fails, the second user plane device can detect the downlink failure of the first user plane device or the first user plane device through BFD, and automatically increase the priority of the second VRRP, and finally make the first VRRP The priority is lower than the second VRRP priority, so that the VRRP state of the second user plane device is switched from the standby state to the main state, and the first user plane device continues to provide services.

Because when the second user plane device receives the keep-alive message sent by the user equipment, it first checks whether it stores the user information corresponding to the keep-alive message. The keep-alive message is reported to the control plane device for response, so that the user equipment can still receive the confirmation message before the second user plane device receives the user information, so that the user equipment will not be disconnected.

When the link on which the first user plane device is located recovers from a fault, for the uplink of the first user plane device, the first user plane device can detect the fault recovery through BFD. For the first user plane device or the first user plane device When the downlink fails to recover, the second user plane device can detect the failure recovery through BFD, and by notifying the control plane device that the link where the first user plane device is located has recovered from the failure, the control plane device sends the second user plane device to the first user plane device. The user information corresponding to the user plane device is notified after the user information is delivered to the second user plane device to switch from the main state to the standby state, so that when the link where the first user plane device is located is restored, the first user plane device can switch Return to the main state to continue to provide services.

In addition, because the control plane device delivers user information first, and then sends the switching notification, so that the problem of user traffic loss will not occur when the first user plane device switches back to the primary state after failure recovery.

When the link on which the first user plane device is located recovers from a fault, for the uplink of the first user plane device, the first user plane device can detect the fault recovery through BFD. For the first user plane device or the first user plane device When the downlink fails to recover, the second user plane device can detect the failure recovery through BFD, and by notifying the control plane device that the link where the first user plane device is located has recovered from the failure, the control plane device sends the second user plane device to the first user plane device. The user information corresponding to the user plane device is notified after the user information is delivered to the first user plane device to switch from the standby state to the main state, so that when the link where the first user plane device is located is restored, the first user plane device can switch over Return to the main state to continue to provide services.

In addition, because the control plane device delivers user information first, and then sends the switching notification, so that the problem of user traffic loss will not occur when the first user plane device switches back to the primary state after failure recovery.

Because when the uplink of the first user plane device fails, the first user plane device can detect the uplink failure through BFD and lower the priority of the first VRRP by itself. When the downlink of the device fails, the second user plane device can detect the downlink failure of the first user plane device or the first user plane device through BFD, and automatically increase the priority of the second VRRP, and finally make the first VRRP The priority is lower than the second VRRP priority, so that the VRRP state of the first user plane device is switched from the main state to the standby state, so that the second user plane device takes over the first user plane device and continues to provide services.

When the link where the first user plane device is located fails, the first user plane device and the second user plane device will perform active/standby switchover by themselves, and then the second user plane device notifies the control plane device of the VRRP state switching, and controls the The plane device delivers user information corresponding to the first user plane device to the second user plane device, so that when the link where the first user plane device is located fails, the second user plane device can take over the first user plane device and continue to provide services.

Since the control plane device receives the keep-alive message reported by the second user plane device and responds when the second user plane device finds that it does not store the user information corresponding to the keep-alive message, the second user plane device Before receiving the user information, the user equipment can still receive the confirmation message, so that the user equipment will not be disconnected.

When the link on which the first user plane device is located recovers from a fault, for the uplink of the first user plane device, the first user plane device can detect the fault recovery through BFD. For the first user plane device or the first user plane device When the downlink fails to recover, the second user plane device can detect the failure recovery through BFD, and by notifying the control plane device that the link where the first user plane device is located has recovered from the failure, the control plane device sends the second user plane device to the first user plane device. The user information corresponding to the user plane device is notified after the user information is delivered to the second user plane device to switch from the main state to the standby state, so that when the link where the first user plane device is located is restored, the first user plane device can switch Return to the main state to continue to provide services.

The following are apparatus embodiments of the present invention, which can be used to execute method embodiments of the present invention. For details not disclosed in the device embodiments of the present invention, please refer to the method embodiments of the present invention.

FIG. 6 is a structural block diagram of a message feedback apparatus provided by an embodiment of the present invention. The message feedback device is applied in the second user plane device 223 shown in FIG. 2A , and the message feedback device can be implemented as part or all of the second user plane device 223 through software, hardware or a combination of the two. As shown in FIG. 6 , the message feedback apparatus 600 includes: an obtaining unit 610 , a receiving unit 620 and a feedback unit 630 .

The obtaining unit 610 is configured to implement the above steps 302, 402, 508, 511, 538, 541 and any other implicit or disclosed functions related to obtaining.

The receiving unit 620 is used to implement the above steps 303, 407a, 408a, 409a, 404b, 405b, 407b, 408b, 409b, 412, 419a, 423a, 424a, 417b, Step 418b, Step 419b, Step 423b, Step 424b, Step 503, Step 504, Step 505, Step 512, Step 525, Step 529, Step 530, Step 533, Step 534, Step 537, Step 542, Step 548, Step 553 , step 554, step 555, step 559, step 560, and any other implicit or disclosed function related to reception.

The feedback unit 630 is used to implement the above steps 304, 413, 513, 514, 515, 543, 544, 545 and any other implicit or disclosed functions related to feedback.

FIG. 7 is a structural block diagram of a message feedback apparatus provided by another embodiment of the present invention. The message feedback device is applied in the first user plane device 222 shown in FIG. 2A , and the message feedback device can be implemented as part or all of the first user plane device 222 through software, hardware or a combination of the two. As shown in FIG. 7 , the message feedback apparatus 700 includes: an obtaining unit 710 , a receiving unit 720 and a feedback unit 730 .

The obtaining unit 710 is configured to implement the above steps 306, 415, 521, 551 and any other implicit or disclosed functions related to obtaining.

The receiving unit 720 is used to implement the above steps 307, 404a, 405a, 406a, 410a, 411a, 406b, 410b, 411b, 417a, 418a, 420a, 421a, 422a, Step 420b, Step 421b, Step 422b, Step 425, Step 501, Step 502, Step 506, Step 507, Step 518, Step 523, Step 524, Step 526, Step 527, Step 528, Step 531, Step 535, Step 536 , step 556 , step 557 , step 558 , step 561 and any other implicit or disclosed functions related to reception.

The feedback unit 730 is used to implement the above step 308, step 426, step 532, step 562 and any other implicit or disclosed functions related to feedback.

FIG. 8 is a structural block diagram of a message feedback apparatus provided by still another embodiment of the present invention. The message feedback apparatus is applied in the control plane device 214 shown in FIG. 2A , and the message feedback apparatus can be implemented as part or all of the control plane device 214 through software, hardware or a combination of the two. As shown in FIG. 8 , the message feedback apparatus 800 includes: a first sending unit 810 and a second sending unit 820 .

The first sending unit 810 is used to implement the above steps 301, 401, 403a, 403b, 509, 510, 516, 517, 539, 540, 546, 547 and any other implicit or public send-related functions.

The second sending unit 820 is configured to implement the above-mentioned steps 305, 414, 416a, 416b, 519, 520, 522, 549, 550, 552 and any other implicit or disclosed related to sending function.

It should be noted that: when the message feedback device provided in the above embodiment feeds back a message, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated to different functional modules as required. , that is, dividing the internal structure of the device into different functional modules to complete all or part of the functions described above. In addition, the message feedback device provided in the above embodiments and the method embodiment of the message feedback method belong to the same concept, and the specific implementation process thereof is detailed in the method embodiment, which will not be repeated here.

It should be understood that, as used herein, the singular forms "a" ("a", "an", "the") are intended to include the plural forms as well, unless the context clearly supports an exception. It will also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages or disadvantages of the embodiments.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, etc.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (40)

1. A message feedback method, characterized in that, used in a second user plane device, the method comprising: When the first user plane device cannot provide the service, obtain user information corresponding to the first user plane device from the control plane device; receiving a keep-alive message sent by the user equipment, where the keep-alive message is used to request that the user equipment be in an online state; query whether there is user information corresponding to the keep-alive message in the second user plane device; When there is user information corresponding to the keep-alive message, feeding back a confirmation message to the user equipment; When there is no user information corresponding to the keep-alive message, the keep-alive message is sent to the control plane device, and the control plane device is configured to respond to the keep-alive message. 2 . The method according to claim 1 , wherein when the first user plane device cannot provide the service, acquiring the user information corresponding to the first user plane device from the control plane device comprises: 2 . When the first user plane device is upgraded, the user information corresponding to the first user plane device delivered by the control plane device is received. 3. The method according to claim 2, wherein when the first user plane device cannot provide the service, after acquiring the user information corresponding to the first user plane device from the control plane device, the method further comprises: Receive a priority increase command sent by the control plane device; increase the second VRRP priority of the second user plane device according to the priority increase command; the second VRRP priority is higher than that of the first user When the first VRRP priority of the plane device is changed, the VRRP state of the second user plane device is switched from the standby state to the main state; or, Receive the first VRRP priority sent by the first user plane device, where the first VRRP priority is lowered by the first user plane device after receiving the priority lowering command from the control plane device; When the second VRRP priority of the second user plane device is higher than the first VRRP priority, the VRRP state of the second user plane device is switched from the standby state to the main state. 4. The method according to claim 3, wherein after the VRRP state of the second user plane device is switched from the standby state to the main state, the method further comprises: Receive a priority reduction command sent by the control plane device, where the priority reduction command is sent by the control plane device after the upgrade of the first user plane device is completed; reduce the priority according to the priority reduction command Two VRRP priorities; when the second VRRP priority is lower than the first VRRP priority, switching the VRRP state of the second user plane device from the main state to the standby state; or, receiving the first VRRP priority sent by the first user plane device, where the first VRRP priority is increased by the first user plane device after receiving a priority increase command from the control plane device, The priority raising command is sent by the control plane device after the first user plane device is upgraded; when the first VRRP priority is higher than the second VRRP priority, the second VRRP priority is The VRRP state of the user plane device is switched from the main state to the standby state. 5 . The method according to claim 1 , wherein, when the first user plane device cannot provide the service, acquiring the user information corresponding to the first user plane device from the control plane device comprises: 6 . When the fault causes the first VRRP priority of the first user plane device to be lower than the second VRRP priority of the second user plane device, switch the VRRP state of the second user plane device from the standby state to the primary state state; sending a VRRP state switching notification to the control plane device; Receive user information corresponding to the first user plane device delivered by the control plane device, where the user information is sent by the control plane device after receiving the VRRP state switching notification. 6 . The method according to claim 5 , wherein when a failure causes the first VRRP priority of the first user plane device to be lower than the second VRRP priority of the second user plane device, 6 . Before switching the VRRP state of the second user plane device from the standby state to the main state, the method further includes: receiving a first VRRP priority sent by the first user plane device, where the first VRRP priority is lowered when the first user plane device detects an uplink failure through BFD; or, When it is detected through BFD that the first user plane device or the downlink of the first user plane device fails, the second VRRP priority is increased. 7. The method according to claim 5, wherein after the VRRP state of the second user plane device is switched from the standby state to the main state, the method further comprises: Receive the first VRRP priority sent by the first user plane device, where the first VRRP priority is increased by the first user plane device when it receives the first handover notification sent by the control plane device , the first handover notification is sent by the control plane device after the user information is delivered to the first user plane device according to the first state change information, and the first state change information is the first user plane device. Sent by the device to the control plane device when the device detects that the uplink failure of the first user plane device has recovered through BFD; when the first VRRP priority is higher than the second VRRP priority, the device sends the The VRRP state of the second user plane device is switched from the main state to the standby state; or, When the first user plane device or the downlink fault recovery of the first user plane device is detected through BFD, the second state change information is sent to the control plane device, according to the first state change information sent by the control plane device. The second handover notification lowers the priority of the second VRRP, the second state change information is used to trigger the control plane device to deliver the user information to the first user plane device, and the second handover notification is the Sent by the control plane device after the user information is delivered to the first user plane device according to the second state change information; when the second VRRP priority is lower than the first VRRP priority, Switch the VRRP state of the second user plane device from the main state to the standby state. 8. The method according to claim 7, wherein when the state of the BFD is DOWN, it indicates a fault, and when the state of the BFD is UP, it indicates normal; The BFD is configured with a delayed UP time, and the duration of the delayed UP time is greater than the duration of the control plane device delivering the user information to the first user plane device. 9. A message feedback method, wherein the method is used in a first user plane device, the method comprising: When the first user plane device recovers from being unable to provide services to providing services, acquiring user information corresponding to the second user plane device from the control plane device; receiving a keep-alive message sent by the user equipment, where the keep-alive message is used to request that the user equipment be in an online state; Feedback a confirmation message to the user equipment according to the user information; The second user plane device is configured to acquire user information corresponding to the first user plane device from the control plane device when the first user plane device cannot provide services, and receive a keep-alive message sent by the user equipment , query whether there is user information corresponding to the keep-alive message in the second user plane device, and when there is user information corresponding to the keep-alive message, feed back the confirmation message to the user equipment , when there is no user information corresponding to the keep-alive message, send the keep-alive message to the control plane device, and the control plane device is used to respond to the keep-alive message. 10 . The method according to claim 9 , wherein when the first user plane device recovers from a state of being unable to provide services to providing services, acquiring user information corresponding to the second user plane device from a control plane device. 11 . ,include: After the first user plane device is upgraded, receiving the user information sent by the control plane device; When the first user plane device recovers from the service-incapable state to the service-providing state, after acquiring the user information corresponding to the second user plane device from the control plane device, the method further includes: Receive a priority increase command sent by the control plane device, where the priority increase command is sent by the control plane device after the first user plane device is upgraded; increase the first user plane device according to the priority increase command The first VRRP priority of a user plane device; when the first VRRP priority is higher than the second VRRP priority of the second user plane device, change the VRRP state of the first user plane device from the standby state switch to the main state; or, Receive a second VRRP priority sent by the second user plane device, where the second VRRP priority is lowered by the second user plane device after receiving a priority lowering command from the control plane device, the The priority reduction command is sent by the control plane device after the first user plane device is upgraded; when the second VRRP priority is lower than the first VRRP priority, the first user plane The VRRP state of the device switches from the standby state to the primary state. 11 . The method according to claim 10 , wherein when the first user plane device recovers from a state of being unable to provide services to providing services, acquiring user information corresponding to the second user plane device from a control plane device. 12 . Before, also included: Receive a priority reduction command sent by the control plane device, where the priority reduction command is sent by the control plane device when the first user plane device is upgraded; reduce the first priority according to the priority reduction command The first VRRP priority of the user plane device; when the first VRRP priority is lower than the second VRRP priority of the second user plane device, change the VRRP state of the first user plane device from the primary the state is switched to the standby state; or, Receive a second VRRP priority sent by the second user plane device, where the second VRRP priority is increased by the second user plane device after receiving a priority increase command from the control plane device, the The priority raising command is sent by the control plane device when the first user plane device is upgraded; when the first VRRP priority of the first user plane device is lower than the second VRRP priority, the The VRRP state of the first user plane device is switched from the main state to the standby state. 12 . The method according to claim 9 , wherein when the first user plane device recovers from a state of being unable to provide services to providing services, acquiring user information corresponding to the second user plane device from a control plane device. 13 . ,include: When the uplink fault recovery of the first user plane device is detected through BFD, first state change information is sent to the control plane device; and the information sent by the control plane device according to the first state change information is received. user information; after the user information is issued, receive the first handover notification sent by the control plane device; increase the first VRRP priority of the first user plane device according to the first handover notification; When the first VRRP priority is higher than the second VRRP priority of the second user plane device, switching the VRRP state of the first user plane device from the standby state to the main state; or, Receive the second VRRP priority sent by the second user plane device, where the second VRRP priority is lowered by the second user plane device when receiving the second handover notification sent by the control plane device , the second handover notification is sent after the control plane device completes sending the user information to the first user plane device according to the second state change information, and the second state change information is the second state change information. Sent by the user plane device to the control plane device when the first user plane device or the downlink fault of the first user plane device is detected through BFD; when the second VRRP priority is lower than the When the first VRRP priority of the first user plane device is selected, the VRRP state of the first user plane device is switched from the standby state to the main state. 13 . The method according to claim 9 , wherein when the first user plane device recovers from a state of being unable to provide services to providing services, acquiring user information corresponding to the second user plane device from a control plane device. 14 . Before, also included: After detecting an uplink failure through BFD, lower the first VRRP priority of the first user plane device; the first VRRP priority of the first user plane device is lower than the second user plane device When the second VRRP priority of the first user plane device is changed, the VRRP state of the first user plane device is switched from the main state to the standby state; or, Receive a second VRRP priority sent by the second user plane device, where the second VRRP priority is when the second user plane device detects the first user plane device or the first user plane device through BFD It is raised when the downlink of the first user equipment fails; when the second VRRP priority is higher than the first VRRP priority of the first user plane equipment, the VRRP state of the first user equipment is switched from the main state to Standby state. 14. The method according to claim 12, wherein when the state of the BFD is DOWN, it indicates a fault, and when the state of the BFD is UP, it indicates normal; The BFD is configured with a delayed UP time, and the delay duration of the delayed UP time is longer than the time duration for the control plane device to deliver the user information to the first user plane device. 15. A message feedback method, characterized in that it is used in a control plane device, the method comprising: When the first user plane device cannot provide the service, the user information corresponding to the first user plane device is sent to the second user plane device, and the second user plane device is used to provide the service when the first user plane device cannot provide the service. When the device is detected, obtain user information corresponding to the first user plane device from the control plane device, receive a keep-alive message sent by the user equipment, and query whether there is a keep-alive message corresponding to the keep-alive message in the second user plane device When there is user information corresponding to the keep-alive message, a confirmation message is fed back to the user equipment, and when there is no user information corresponding to the keep-alive message, a confirmation message is sent to the control plane. The device sends the keep-alive message, and the control plane device is used to respond to the keep-alive message; When the first user plane device recovers from being unable to provide services to providing services, sending user information corresponding to the second user plane device to the first user plane device, and the first user plane device is configured to receive the transmission from the user equipment the keep-alive message, and feed back a confirmation message to the user equipment according to the user information. 16 . The method according to claim 15 , wherein when the first user plane device cannot provide the service, sending the user information corresponding to the first user plane device to the second user plane device comprises: 16 . When the first user plane device is upgraded, send the user information corresponding to the first user plane device to the second user plane device; After the user information corresponding to the first user plane device is sent to the second user plane device when the first user plane device cannot provide the service, the method further includes: Send a priority lowering command to the first user plane device, where the first user plane device is configured to lower the first VRRP priority of the first user plane device after receiving the priority lowering command. when the first VRRP priority is lower than the second VRRP priority of the second user plane device, switching the VRRP state of the first user plane device from the main state to the standby state; or, Send a priority increase command to the second user plane device, the second user plane device is configured to increase the second VRRP priority of the second user plane device after receiving the priority increase command, and in the When the second VRRP priority is higher than the first VRRP priority of the first user plane device, the VRRP state of the second user plane device is switched from the standby state to the main state. 17 . The method according to claim 15 , wherein, when the first user plane device recovers from being unable to provide a service to providing a service, sending the correspondence of the second user plane device to the first user plane device. 18 . user information, including: After the upgrade of the first user plane device is completed, send the user information corresponding to the second user plane device to the first user plane device; The step of sending the user information corresponding to the second user plane device to the first user plane device when the first user plane device recovers from being unable to provide the service to providing the service, further includes: Send a priority increase command to the first user plane device, where the first user plane device is configured to increase the first VRRP priority of the first user plane device after receiving the priority increase command, where When the first VRRP priority is higher than the second VRRP priority of the second user plane device, switching the VRRP state of the first user plane device from the standby state to the main state; or, Send a priority lowering command to the second user plane device, where the second user plane device is configured to lower the second VRRP priority of the second user plane device after receiving the priority lowering command, at When the second VRRP priority is lower than the first VRRP priority of the first user plane device, the VRRP state of the second user plane device is switched from the main state to the standby state. 18. The method according to claim 15, wherein when the first user plane device cannot provide the service, sending the user information corresponding to the first user plane device to the second user plane device comprises: Receive a VRRP state switching notification sent by the second user plane device, where the VRRP state switching notification is when the first VRRP priority of the first user plane device is lower than the second VRRP priority of the second user plane device sent at the level; delivering user information corresponding to the first user plane device to the second user plane device; The first VRRP priority is lowered after the first user plane device detects an uplink failure through BFD; or the second VRRP priority is detected by the second user plane device through BFD Raised when the first user plane device or the downlink of the first user plane device fails. The method according to claim 18, wherein before the sending the user information corresponding to the first user plane device to the second user plane device, the method further comprises: Receive a keep-alive message of the user equipment sent by the second user plane device, where the keep-alive message is sent when the second user plane device finds that there is no user information corresponding to the keep-alive message of; Feedback a confirmation message to the user equipment according to the stored user information. 20 . The method according to claim 15 , wherein when the first user plane device recovers from being unable to provide a service to providing a service, sending the correspondence of the second user plane device to the first user plane device. 21 . Before the user information, it also includes: Receive first state change information sent by the first user plane device, where the first state change information is sent when the first user plane device detects through BFD that the uplink fault of the first user plane device has recovered of; or, Receive second state change information sent by the second user plane device, where the second state change information is that the second user plane device detects the first user plane device or the first user plane device through BFD Sent when the downlink fails to recover; The step of sending the user information corresponding to the second user plane device to the first user plane device when the first user plane device recovers from being unable to provide the service to providing the service, further includes: After the user information is issued, send a first handover notification to the first user plane device, where the first handover notification is used to increase the first VRRP priority of the first user plane device; or, After the delivery of the user information is completed, a second handover notification is sent to the second user plane device, where the second handover notification is used to reduce the second VRRP priority of the second user plane device. 21. A message feedback device, wherein the device is used in a second user plane device, the device comprising: an acquiring unit, configured to acquire user information corresponding to the first user plane device from the control plane device when the first user plane device cannot provide the service; a receiving unit, configured to receive a keep-alive message sent by the user equipment, where the keep-alive message is used to request that the user equipment be in an online state; a feedback unit, configured to query whether there is user information corresponding to the keep-alive message in the second user plane device; when there is user information corresponding to the keep-alive message, feedback confirmation to the user equipment message; when there is no user information corresponding to the keep-alive message, send the keep-alive message to the control plane device, and the control plane device is used to respond to the keep-alive message. 22. The apparatus of claim 21, wherein The acquiring unit is further configured to receive user information corresponding to the first user plane device delivered by the control plane device when the first user plane device is upgraded. 23. The apparatus of claim 22, wherein The receiving unit is further configured to receive a priority increase command sent by the control plane device; increase the second VRRP priority of the second user plane device according to the priority increase command; When the level is higher than the first VRRP priority of the first user plane device, switching the VRRP state of the second user plane device from the standby state to the main state; The receiving unit is further configured to receive a first VRRP priority sent by the first user plane device, where the first VRRP priority is the priority of the first user plane device when it receives the control plane device Reduced after the lowering command; when the second VRRP priority of the second user plane device is higher than the first VRRP priority, the VRRP state of the second user plane device is switched from the standby state to the main state. 24. The apparatus of claim 23, wherein The receiving unit is further configured to receive a priority reduction command sent by the control plane device, where the priority reduction command is sent by the control plane device after the first user plane device is upgraded; according to the The priority reduction command reduces the priority of the second VRRP; when the priority of the second VRRP is lower than the priority of the first VRRP, the VRRP state of the second user plane device is switched from the main state to the standby state; The receiving unit is further configured to receive the first VRRP priority sent by the first user plane device, where the first VRRP priority is received by the first user plane device from the control plane device. The priority increase command is increased after the priority increase command is sent by the control plane device after the first user plane device is upgraded; when the first VRRP priority is higher than the second VRRP priority When the second user plane device is in level, the VRRP state of the second user plane device is switched from the main state to the standby state. 25. The apparatus of claim 21, wherein The acquiring unit is further configured to, when a failure causes the first VRRP priority of the first user plane device to be lower than the second VRRP priority of the second user plane device, to retrieve the second user plane device's first VRRP priority. The VRRP state is switched from the standby state to the main state; a VRRP state switching notification is sent to the control plane device; and the user information corresponding to the first user plane device sent by the control plane device is received, and the user information is the Sent by the control plane device after receiving the VRRP state switching notification. 26. The apparatus of claim 25, wherein The receiving unit is further configured to receive a first VRRP priority sent by the first user plane device, where the first VRRP priority is lowered when the first user plane device detects an uplink failure through BFD of; or, The receiving unit is further configured to increase the priority of the second VRRP when a failure of the first user plane device or the downlink of the first user plane device is detected through BFD. 27. The apparatus of claim 24, wherein The receiving unit is further configured to receive the first VRRP priority sent by the first user plane device, where the first VRRP priority is when the first user plane device receives the first VRRP priority sent by the control plane device The first handover notification is sent after the control plane device completes sending user information to the first user plane device according to the first state change information, and the first state change The information is sent to the control plane device when the first user plane device detects that the uplink failure of the first user plane device has recovered through BFD; when the first VRRP priority is higher than the second When the VRRP priority is given, switching the VRRP state of the second user plane device from the main state to the standby state; The receiving unit is further configured to send the second state change information to the control plane device when the first user plane device or the downlink fault recovery of the first user plane device is detected through BFD, according to the The second handover notification sent by the control plane device reduces the second VRRP priority, and the second state change information is used to trigger the control plane device to deliver the user information to the first user plane device, The second handover notification is sent after the control plane device completes delivering the user information to the first user plane device according to the second state change information; when the second VRRP priority is lower than the When the first VRRP priority is selected, the VRRP state of the second user plane device is switched from the main state to the standby state. 28. The device according to claim 27, wherein when the state of the BFD is DOWN, it indicates a fault, and when the state of the BFD is UP, it indicates normal; The BFD is configured with a delayed UP time, and the duration of the delayed UP time is greater than the duration of the control plane device delivering the user information to the first user plane device. 29. A message feedback device, characterized in that it is used in a first user plane device, the device comprising: an obtaining unit, configured to obtain the user information corresponding to the second user plane device from the control plane device when the first user plane device recovers from the state of being unable to provide the service to the state of providing the service; a receiving unit, configured to receive a keep-alive message sent by the user equipment, where the keep-alive message is used to request that the user equipment be in an online state; a feedback unit, configured to feed back a confirmation message to the user equipment according to the user information obtained by the obtaining unit; The second user plane device is configured to acquire user information corresponding to the first user plane device from the control plane device when the first user plane device cannot provide services, and receive a keep-alive message sent by the user equipment , query whether there is user information corresponding to the keep-alive message in the second user plane device, and when there is user information corresponding to the keep-alive message, feed back the confirmation message to the user equipment , when there is no user information corresponding to the keep-alive message, send the keep-alive message to the control plane device, and the control plane device is used to respond to the keep-alive message. 30. The apparatus of claim 29, wherein The acquiring unit is further configured to receive the user information sent by the control plane device after the first user plane device is upgraded; The receiving unit is further configured to receive a priority increase command sent by the control plane device, where the priority increase command is sent by the control plane device after the first user plane device is upgraded; according to the The priority raising command increases the first VRRP priority of the first user plane device; when the first VRRP priority is higher than the second VRRP priority of the second user plane device, the first user The VRRP state of the plane device is switched from the standby state to the primary state; The receiving unit is further configured to receive a second VRRP priority sent by the second user plane device, where the second VRRP priority is the priority of the second user plane device when it receives the control plane device After the lowering command, the priority lowering command is sent by the control plane device after the upgrade of the first user plane device is completed; when the second VRRP priority is lower than the first VRRP priority , switching the VRRP state of the first user plane device from the standby state to the main state. 31. The apparatus of claim 30, wherein The receiving unit is further configured to receive a priority reduction command sent by the control plane device, where the priority reduction command is sent by the control plane device when the first user plane device is upgraded; according to the priority A level lowering command lowers the first VRRP priority of the first user plane device; when the first VRRP priority is lower than the second VRRP priority of the second user plane device, the first user plane device The VRRP state of the device is switched from the main state to the standby state; The receiving unit is further configured to receive a second VRRP priority sent by the second user plane device, where the second VRRP priority is the priority of the second user plane device when it receives the control plane device If the priority is increased after the increase command, the priority increase command is sent by the control plane device when the first user plane device is upgraded; when the first VRRP priority of the first user plane device is lower than the first user plane device. When the VRRP priority is two, the VRRP state of the first user plane device is switched from the main state to the standby state. 32. The apparatus of claim 29, wherein The receiving unit is further configured to send the first state change information to the control plane device when the uplink fault recovery of the first user plane device is detected through BFD; receive the control plane device according to the The user information issued by the first state change information; after the user information is issued, receive the first handover notification sent by the control plane device; according to the first handover notification, improve the a first VRRP priority; when the first VRRP priority is higher than the second VRRP priority of the second user plane device, switching the VRRP state of the first user plane device from the standby state to the main state; The receiving unit is further configured to receive the second VRRP priority sent by the second user plane device, where the second VRRP priority is when the second user plane device receives the second VRRP priority sent by the control plane device The second handover notification is reduced when the second handover notification is sent after the control plane device completes sending the user information to the first user plane device according to the second state change information. The state change information is sent by the second user plane device to the control plane device when the second user plane device detects that the first user plane device or the downlink failure of the first user plane device has recovered through BFD; When the VRRP priority is lower than the first VRRP priority of the first user plane device, the VRRP state of the first user plane device is switched from the standby state to the main state. 33. The apparatus of claim 29, wherein The receiving unit is further configured to lower the first VRRP priority of the first user plane device after detecting an uplink failure through BFD; the first VRRP priority of the first user plane device is low Switching the VRRP state of the first user plane device from the main state to the standby state when the second VRRP priority of the second user plane device is used; The receiving unit is further configured to receive a second VRRP priority sent by the second user plane device, where the second VRRP priority is when the second user plane device detects the first user plane device through BFD or increased when the downlink of the first user plane device fails; when the second VRRP priority is higher than the first VRRP priority of the first user plane device, the first user plane The VRRP state of the device is switched from the master state to the standby state. 34. The apparatus according to claim 32, wherein when the state of the BFD is DOWN, it indicates a fault, and when the state of the BFD is UP, it indicates normal; The BFD is configured with a delayed UP time, and the delay duration of the delayed UP time is longer than the time duration for the control plane device to deliver the user information to the first user plane device. 35. A message feedback device, characterized in that it is used in a control plane device, the device comprising: A first sending unit, configured to send user information corresponding to the first user plane device to a second user plane device when the first user plane device cannot provide services, and the second user plane device is configured to send the user information corresponding to the first user plane device to the second user plane device. When a user plane device cannot provide services, obtain user information corresponding to the first user plane device from the control plane device, receive a keep-alive message sent by the user equipment, and query whether the second user plane device exists The user information corresponding to the keep-alive message, when there is user information corresponding to the keep-alive message, a confirmation message is fed back to the user equipment, and when there is no user information corresponding to the keep-alive message When the message is sent, the keep-alive message is sent to the control plane device, and the control plane device is used to respond to the keep-alive message; a second sending unit, configured to send the user information corresponding to the second user plane device to the first user plane device when the first user plane device recovers from being unable to provide services to providing services, and the first user plane device The device is configured to receive a keep-alive message sent by the user equipment, and feed back a confirmation message to the user equipment according to the user information. 36. The apparatus of claim 35, wherein The first sending unit is further configured to send user information corresponding to the first user plane device to the second user plane device when the first user plane device is upgraded; The first sending unit is further configured to send a priority lowering command to the first user plane device, where the first user plane device is configured to lower the first user plane after receiving the priority lowering command The first VRRP priority of the device, when the first VRRP priority is lower than the second VRRP priority of the second user plane device, the VRRP state of the first user plane device is switched from the master state to the standby state state; The first sending unit is configured to send a priority raising command to the second user plane device, and the second user plane device is configured to raise the second user plane device after receiving the priority raising command When the second VRRP priority is higher than the first VRRP priority of the first user plane device, switch the VRRP state of the second user plane device from the standby state to the main state . 37. The apparatus of claim 35, wherein The second sending unit is further configured to send the user information corresponding to the second user plane device to the first user plane device after the first user plane device is upgraded; The second sending unit is further configured to send a priority raising command to the first user plane device, where the first user plane device is configured to raise the first user plane after receiving the priority raising command The first VRRP priority of the device, when the first VRRP priority is higher than the second VRRP priority of the second user plane device, the VRRP state of the first user plane device is switched from the standby state to the primary state state; The second sending unit is further configured to send a priority lowering command to the second user plane device, where the second user plane device is configured to lower the priority of the second user after receiving the priority lowering command The second VRRP priority of the user plane device, when the second VRRP priority is lower than the first VRRP priority of the first user plane device, switch the VRRP state of the second user plane device from the main state to Standby state. 38. The apparatus of claim 35, wherein The first sending unit is further configured to receive a VRRP state switching notification sent by the second user plane device, where the VRRP state switching notification is when the first VRRP priority of the first user plane device is lower than the Sent when the second VRRP priority of the second user plane device; delivering user information corresponding to the first user plane device to the second user plane device; wherein the first VRRP priority is the first user plane device After a user plane device detects an uplink failure through BFD, the second VRRP priority is reduced; or the second VRRP priority is when the second user plane device detects the first user plane device or the first user plane device through BFD. Raised when the downlink of the user plane equipment fails. 39. The apparatus of claim 38, wherein The first sending unit is further configured to receive a keep-alive message of the user equipment sent by the second user plane device. It is sent when the user information corresponding to the keep-alive message is sent; the confirmation message is fed back to the user equipment according to the stored user information. 40. The apparatus of claim 35, wherein The first sending unit is further configured to receive first state change information sent by the first user plane device, where the first state change information is that the first user plane device detects the first user through BFD Sent when the uplink of the plane device recovers from a fault; The first sending unit is further configured to receive second state change information sent by the second user plane device, where the second state change information is that the second user plane device detects the first user through BFD Sent when the downlink fault of the plane device or the first user plane device recovers; The second sending unit is further configured to send a first handover notification to the first user plane device after the user information is issued, where the first handover notification is used to improve the first user plane device The first VRRP priority of; The second sending unit is further configured to send a second handover notification to the second user plane device after the user information is issued, where the second handover notification is used to lower the second user plane device The second VRRP priority.

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