CN115348153B - Control method, device, equipment and storage medium of forwarding equipment - Google Patents

Abstract

The application provides a control method, a control device and a control storage medium of forwarding equipment, and relates to the technical field of communication. The method is applied to a matched device, the matched device is one of a plurality of forwarding devices in a preset network architecture, the network architecture further comprises a network control device, and the method comprises the following steps: acquiring a flow table corresponding to each forwarding device, each forwarding device and initial state information of a corresponding link from network control equipment; monitoring whether the network control equipment is in normal operation; if the network control equipment is determined not to normally operate, determining the follow-up state information of each forwarding equipment and the corresponding link; and if the network control equipment is monitored to restore normal operation, the flow table and the subsequent state information are sent to the network control equipment. The method and the device cooperate with the equipment to ensure that the flow table and the initial state information are not lost, and store the subsequent state information of each forwarding device; when the network control equipment resumes normal operation, the flow table and the subsequent state information of each forwarding equipment can be quickly acquired, and the time consumption is low.

Description

Control method, device, device and storage medium of forwarding equipment

technical field

The present application relates to communication technology, and in particular to a control method, device, device and storage medium of forwarding equipment.

Background technique

Software Defined Network (SDN for short) is a new network innovation architecture. Its concept is to centralize the management of the entire network. SDN centralizes the decision-making capabilities of all network devices (specifically expressed as flow tables) to network control devices. Above all, the network device is replaced by a forwarding device with a simple structure, and the forwarding device only needs to perform forwarding of communication data. In recent years, more and more developers pay attention to how to ensure that the flow table generated by the network control device and the state information of all forwarding devices are not lost when the network control device fails, or the bus between the network control device and all forwarding devices is interrupted And other issues.

In the prior art, the network control device generates flow tables of all forwarding devices, sends them to each forwarding device, and informs each forwarding device how to forward communication data. At the same time, the network control device will also monitor the status information of each forwarding device and the corresponding link. When the network control device fails, or the bus between the network control device and all forwarding devices is interrupted, it is necessary to repair the network control device and/or the bus, or deploy a new network control device to take over, and/or a new bus to Connect all forwarding devices. The repaired network control device or the new network control device obtains the state information of all forwarding devices one by one, and generates a new flow table.

However, during repair or before a new network control device takes over, if at least one forwarding device is damaged or its corresponding link is interrupted, the network control device will not be able to obtain the status information of the forwarding device; the repaired network control device or the new network control The device loses all previous flow tables and status information of all forwarding devices. It needs to re-acquire the status information of all forwarding devices and generate new flow tables, which consumes a lot of time, which in turn leads to the efficiency of obtaining the status information of all forwarding devices and flow tables. lower.

Contents of the invention

This application provides a forwarding device control method, device, device, and storage medium to solve the problem that if at least one forwarding device is damaged or its corresponding link is interrupted during repair or before a new network control device takes over, the network control device will The problem that the state information of the forwarding device cannot be obtained; it also solves the problem that the repaired network control device or the new network control device loses all the previous flow tables and the state information of all forwarding devices, and it is necessary to obtain the state information of all forwarding devices and generate The new flow table consumes a lot of time, which leads to the problem of low efficiency in obtaining the state information of all forwarding devices and the flow table.

In a first aspect, the present application provides a method for controlling a forwarding device, the method is applied to a coordinating device, and the coordinating device is one of multiple forwarding devices in a preset network architecture, and the preset network architecture further includes Network control equipment, including:

Obtain the flow table corresponding to each forwarding device, each forwarding device and the initial state information of the corresponding link from the network control device;

monitoring whether the network control device is operating normally;

If it is determined that the network control device is not operating normally, then determine the subsequent state information of each forwarding device and the corresponding link;

If it is detected that the network control device resumes normal operation, the flow table and the subsequent state information are sent to the network control device.

In a feasible manner, the monitoring whether the network control device is running normally includes:

Monitoring whether the network control device fails and whether the bus between the network control device and each forwarding device is interrupted.

In a feasible manner, the monitoring whether the network control device is running normally includes:

sending a keep-alive message to the network control device;

After a preset time, it is judged whether a keep-alive message response is received;

If it is determined that the keep-alive message response is received, it is determined that the network control device is operating normally;

If it is determined that no keep-alive message response is received, it is determined that the network control device is not running normally.

In a feasible manner, the determination of the subsequent state information of each forwarding device and the corresponding link includes:

sending a detection message to an adjacent forwarding device, so that the adjacent forwarding device obtains the link information that the detection message passes through, carries the link information into the detection message, and sends the The forwarding device continues to forward the detection message;

Receiving a mirror detection message sent by an adjacent forwarding device, where the mirror detection message includes a forwarding link through which the mirror detection message passes;

Subsequent state information of each forwarding device and corresponding link is determined according to the forwarding link and at least one pre-stored terminal forwarding device identifier.

In a feasible manner, the determining subsequent state information of each forwarding device and corresponding link according to the forwarding link and at least one pre-stored terminal forwarding device identifier includes:

Determine whether the forwarding link includes the corresponding terminal forwarding device identifier;

If it is determined that the forwarding link does not include the corresponding terminal forwarding device identifier, determine the faulty forwarding device or disconnected link according to the forwarding link, and determine the subsequent state information of the faulty forwarding device or the corresponding disconnected link It is a fault state, and it is determined that there is no faulty forwarding device and the subsequent state information of the corresponding disconnected link is a normal state;

If it is determined that the forwarding link includes the corresponding terminal forwarding device identifier, it is determined that there is no faulty forwarding device and disconnected link in the forwarding link, and it is determined that the subsequent state information of each forwarding device and the corresponding link is in a normal state.

In a feasible manner, monitoring whether the network control equipment resumes normal operation includes:

periodically sending a keep-alive message to the network control device;

After each keep-alive message is sent, it is judged whether a keep-alive message response is received after a preset time;

If it is determined that the keep-alive message response is received, it is determined that the network control device resumes normal operation;

If it is determined that no keep-alive message response is received, it is determined that the network control device has not resumed normal operation.

In a feasible manner, if it is determined that the network control device is running normally, the method further includes:

receiving a flow table update instruction sent by the network control device, where the flow table update instruction includes a new flow table corresponding to at least one forwarding device;

The flow table of the corresponding forwarding device is updated according to the new flow table.

In a second aspect, the present application provides a control device for a forwarding device, the device is located in a coordinating device, and the coordinating device is one of multiple forwarding devices in a preset network architecture, and the preset network architecture also includes a network control equipment, said means comprising:

An acquisition module, configured to acquire the flow table corresponding to each forwarding device, each forwarding device and the initial state information of the corresponding link from the network control device;

A monitoring module, configured to monitor whether the network control device is operating normally;

A determination module, configured to determine subsequent state information of each forwarding device and corresponding link if it is determined that the network control device is not operating normally;

A sending module, configured to send the flow table and the subsequent state information to the network control device if it is detected that the network control device resumes normal operation.

In a third aspect, the present application provides a cooperation device, the cooperation device includes: a processor, and a memory and a transceiver communicatively connected to the processor;

The memory stores computer-executable instructions; the transceiver is used to send and receive data;

The processor executes the computer-executed instructions stored in the memory, so as to implement the method described in the above first aspect or any feasible manner.

In a fourth aspect, the present application provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement the first aspect or any one of the above-mentioned aspects. methods described in One Possible Way.

The present application provides a forwarding device control method, device, device, and storage medium, the method is applied to a coordinating device, and the coordinating device is one of multiple forwarding devices in a preset network architecture, and the preset network architecture also includes A network control device, the method includes: obtaining the flow table corresponding to each forwarding device, each forwarding device and the initial state information of the corresponding link from the network control device; monitoring whether the network control device is running normally; if it is determined that the network control device is not in If it is running normally, determine the subsequent state information of each forwarding device and the corresponding link; if it detects that the network control device is back to normal operation, then send the flow table and subsequent state information to the network control device. In this application, the cooperative device acquires and stores the flow table corresponding to each forwarding device, each forwarding device and the initial state information of the corresponding link from the network control device; then cooperates with the device to monitor whether the network control device is operating normally; if the network control device If it is not running normally, the cooperating device will determine the subsequent status information of each forwarding device and the corresponding link, and the cooperating device will temporarily perform the function of monitoring the forwarding device in the network control device and store the subsequent status information; if the cooperating device monitors the network control device After returning to normal operation, the cooperative device will send the flow table and subsequent state information stored by itself to the network control device that resumes work. This application uses the cooperative device to store the flow table corresponding to each forwarding device, the initial state information of each forwarding device and the corresponding link, which can ensure that the flow table and initial state information are not lost; when the network control device is not operating normally, the cooperative device Then collect and determine the follow-up state information of each forwarding device and the corresponding link, ensure timely acquisition and storage of the follow-up state information of each forwarding device, which is conducive to the monitoring of the forwarding device and the corresponding link; when the network control device returns to normal operation, The cooperating device sends the flow table and subsequent state information to the network control device, which facilitates the network control device to obtain the flow table and subsequent state information of each forwarding device in a timely and fast manner, without spending a lot of time re-obtaining the flow table and subsequent state information one by one. This saves time and improves the efficiency of obtaining state information and flow tables of all forwarding devices.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

FIG. 1 is a network architecture diagram provided by the prior art;

FIG. 2 is a network system architecture diagram of a method for controlling a forwarding device provided by the present application;

FIG. 3 is a schematic flowchart of a method for controlling a forwarding device provided in Embodiment 1 of the present application;

FIG. 4 is a schematic flowchart of a method for controlling a forwarding device provided in Embodiment 3 of the present application;

FIG. 5 is a schematic flowchart of a method for controlling a forwarding device provided in Embodiment 4 of the present application;

FIG. 6 is a schematic flowchart of a method for controlling a forwarding device provided in Embodiment 5 of the present application;

FIG. 7 is a schematic diagram of a control device of a forwarding device provided in Embodiment 7 of the present application;

FIG. 8 is a schematic structural diagram of a matching device provided in Embodiment 8 of the present application.

By means of the above drawings, specific embodiments of the present application have been shown, which will be described in more detail hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the application in any way, but to illustrate the concept of the application for those skilled in the art by referring to specific embodiments.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

First, the nouns involved in this application are explained:

Forwarding device: When communication data is transmitted in the network, two communication unit devices cannot be directly connected to transmit communication data. Therefore, an intermediate device needs to be deployed in the communication data transmission path for transfer. The intermediate device is the forwarding device. In most actual cases, the forwarding device can be regarded as a large router, which mainly realizes the forwarding function of communication data.

Network control device: refers to separating the control functions of all network devices and concentrating them on one device, which is the network control device. The network control device has decision-making ability, and controls all forwarding devices to forward communication data according to a negotiated protocol.

The traditional network architecture is composed of many network devices, links between each network device and other related devices. A network device has the function of control and communication data forwarding.

Until recent years, a new type of network architecture, namely Software Defined Network (SDN for short), was proposed, which is an implementation method of network virtualization. The core technology of SDN is to separate the control function of each network device from the communication data forwarding function, and only keep the communication data forwarding function in the network device, and the original network device becomes a forwarding device with a simple structure, which has the communication data forwarding function . However, the control functions of the original network devices will all be concentrated in one network control device, and the network control device will control all forwarding devices and make decisions. Specifically, the network control device generates the flow tables of all forwarding devices and sends them to each forwarding device. Each forwarding device reads the flow table entries and forwards the communication data based on the flow table entries. This process is the network control device A decision is made to forward the communication data, and the forwarding device performs the forwarding of the communication data.

Figure 1 is a network architecture diagram provided by the prior art. As shown in Figure 1, the network control device is connected to a bus, and the bus includes ports A that can connect multiple lines, and each port A includes multiple interfaces A , each interface A can be connected to multiple line ports B, each port B contains multiple interfaces B, and each interface B can be connected to a forwarding device.

Optionally, interface B may also be connected to port C of multiple lines, and so on until the last interface is connected to the forwarding device. Wherein, the number of forwarding devices may reach hundreds or even more.

In the prior art, after the network architecture is completed, the network control device obtains the status information of all forwarding devices, the status information includes whether the forwarding device is faulty, whether the link corresponding to the forwarding device is disconnected, and which forwarding devices the forwarding device is related to connection etc. At the same time, the network control device can generate the flow table of each forwarding device according to the obtained status information of the forwarding device and actual needs. The number of flow tables is the same as the number of forwarding devices. The entries will inform the respective forwarding devices how to forward the communication data and make a decision on communication data forwarding. After the network control device generates the flow table, it sends it to the respective forwarding devices. Each forwarding device reads and stores the flow table, and forwards the communication data according to the decision of the flow table. Specifically, each forwarding device has at least one adjacent forwarding device, and the flow table of each forwarding device determines which adjacent forwarding device its own forwarding device should forward communication data to, and the forwarding device proceeds according to the decision of the flow table. The forwarding of the communication data is forwarded to the next adjacent forwarding device. When at least one forwarding device appears to be faulty, or the link corresponding to the forwarding device is disconnected, in order to prevent communication data from passing through the faulty forwarding device or the disconnected link, the network control device will The flow table is updated, so that when the above-mentioned unfavorable situation occurs, the communication data bypasses the faulty forwarding device or the broken link, and finally realizes the transmission of the communication data.

However, there are still some defects in the prior art. The specific manifestations are as follows: first, when the network control device fails, or the bus between the network control device and each forwarding device is disconnected, the network control device will not be able to make decisions, and the network control device and each forwarding device are in a state of Isolated state, that is, there is no communication connection between each other. The flow table in the network control device and the initial state information of each forwarding device will be lost or damaged; at the same time, the network control device cannot obtain the follow-up state information of each forwarding device and its corresponding link; secondly, when there is a new The network control device takes over and/or the bus connection again, or the old network control device and/or the bus has been repaired, the network control device needs to reacquire the current state information of each forwarding device and its corresponding link, and regenerate the flow according to the current state information table, the process is complicated and time consuming.

In order to solve the loss or damage of the flow table in the network control device and the initial state information of each forwarding device in the prior art, the network control device cannot obtain the subsequent state information of each forwarding device and its corresponding link, and the network control device needs to obtain it again The inventors of this solution designed a new solution after creative research to solve the time-consuming problem of generating the flow table from the current state information of each forwarding device and its corresponding link. This solution is applied to a coordinating device, and the coordinating device is one of multiple forwarding devices in a preset network architecture, and the preset network architecture also includes a network control device. In order to solve the problems such as the loss or damage of the flow table in the network control device and the initial state information of each forwarding device, this solution is specifically manifested in: cooperate with the device to obtain the flow table corresponding to each forwarding device, each forwarding device and the corresponding The initial state information of the link and store it. In order to solve the problem that the network control device cannot obtain the subsequent state information of each forwarding device and its corresponding link when the network control device is not operating normally, the cooperative device collects the subsequent state information of each forwarding device. If the device is not running normally, the cooperative device determines the subsequent state information of each forwarding device and the corresponding link. In order to solve the problem that when the network control device resumes normal operation, it takes a long time for the network control device to reacquire the current state information of each forwarding device and its corresponding link to generate a flow table, which in turn leads to a low efficiency in obtaining the state information and flow table of all forwarding devices. For low-level problems, this solution can cooperate with the device to quickly send the flow table stored by itself and the subsequent state information of each forwarding device to the network control device. Subsequent status information is sent to the network control device.

The network system architecture of a forwarding device control method, device, device, and storage medium provided by the present application is introduced below.

FIG. 2 is a network system architecture diagram of a method for controlling a forwarding device provided in the present application. As shown in FIG. 2 , the network system architecture includes multiple forwarding devices 201 , a network control device 202 , and a coordination device 203 . It should be noted that the number of forwarding devices can be as high as one hundred, and the cooperation device 203 is preset from multiple forwarding devices 201 . Each forwarding device 201 is communicatively connected to the network control device 202 through a bus and respective links. The forwarding devices 201 can be connected by communication, and whether each forwarding device 201 is connected by communication is determined according to the requirements of the operator, and there is no limitation here. Wherein, the communication connection may be a feeder connection or an optical fiber connection.

Wherein, the forwarding device 201 includes a forwarding device A, a forwarding device B, a forwarding device C, a forwarding device D, and a forwarding device E. Among them, the forwarding device A is connected to the forwarding device B and the forwarding device C respectively, the forwarding device B is connected to the forwarding device C and the forwarding device E, the forwarding device C is connected to the forwarding device D, and the forwarding device D is connected to the forwarding device E communicates with the coordinating device 203 , and forwarding device E communicates with the coordinating device 203 .

The specific workflow is as follows: After the network architecture is completed, the network control device 202 will obtain the initial state information of all forwarding devices 201, and generate the flow table of each forwarding device 201 according to the initial state information, wherein the state information includes the state of each forwarding device 201 , the connection information of the forwarding device 201, the link information corresponding to the forwarding device 201, and the like. Among the many forwarding devices 201, a coordinating device 203 is preset, and the coordinating device 203 can perform not only the function of the forwarding device 201, but also part of the functions of the network control device. The network control device 203 sends the flow table of each forwarding device, the initial state information of each forwarding device and the corresponding link to the cooperation device 203, and the cooperation device 203 receives the flow table of each forwarding device, the initial state of each forwarding device and the corresponding link Information is stored in its own storage area for backup. The cooperation device 203 periodically sends a keep-alive message to the network control device 202 to monitor whether the network control device 202 is running normally. If the cooperating device 203 determines that the network control device 202 is not operating normally, the cooperating device 203 sends a detection message to all forwarding devices 201 adjacent to it. The main purpose is to detect subsequent state information of all forwarding devices 201 and corresponding links, and monitor Information such as whether the forwarding device 201 fails, or whether its corresponding link is broken. The cooperating device 203 collects subsequent state information of all forwarding devices 201 and stores it in its own storage area. It can be understood that if the initial state information and the subsequent state information change, the cooperation device 203 will identify which/multiple forwarding devices and the subsequent state information and initial information of the corresponding link have changed, and the forwarding device's The initial state information is replaced with subsequent state information and stored.

Further, if the cooperation device 203 detects that the network control device resumes normal operation, it will send the flow table and subsequent state information stored by itself to the network control device 202, and the network control device 202 will store it. change, the network control device 202 generates a corresponding new flow table according to the subsequent state information, and re-controls each forwarding device to forward communication data according to the decision of the new flow table. Wherein, the network control device may only update the flow tables of the forwarding devices whose state information changes subsequently, and may not need to update the flow tables of all the forwarding devices.

It should be noted that the coordinating device of the present application has a communication data forwarding function of the forwarding device. When the network control device is not running normally, the cooperating device needs to collect the follow-up status information of each forwarding device and the corresponding link, and forward the communication data according to its own flow table; when the network control device is running normally, the cooperating device needs to To send a keep-alive message to the network control, the communication data should also be forwarded according to its own flow table.

The present application provides a control method, device, device, and storage medium for a forwarding device, aiming to solve the above technical problems in the prior art.

The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below in conjunction with the accompanying drawings.

Embodiment one

FIG. 3 is a schematic flowchart of a method for controlling a forwarding device provided in Embodiment 1 of the present application. The executor of the method of the present application is the control device of the forwarding device. The method is applied to the coordinating device. The coordinating device is one of the multiple forwarding devices in the preset network architecture, and the preset network architecture also includes network control equipment, as shown in Figure 3 As shown, the method in this embodiment includes the following steps.

S301. Obtain a flow table corresponding to each forwarding device, initial state information of each forwarding device and a corresponding link from the network control device.

Wherein, the initial status information is the status information of each forwarding device and the corresponding link before the network control device fails, including information such as whether each forwarding device fails, and/or whether the corresponding link is disconnected. When the network control device is intact, the initial state information can be updated, and the cooperative device generally stores the latest initial state information. The flow table corresponding to the forwarding device is the forwarding decision of each forwarding device for communication data under the current state information, which is specifically expressed as a flow table. The flow table includes the decision of which forwarding device forwards communication data to its adjacent forwarding device. Wherein, the flow table of each forwarding device will be updated according to the update of the initial state information, and the flow table of each forwarding device is inconsistent.

Among them, after the preset network architecture is completed, the network control device will collect and monitor the initial state information of each forwarding device and the corresponding link, and generate the flow table of each forwarding device according to the initial state information, and simultaneously store the initial state information and the flow table Send to the cooperative device, and the cooperative device obtains the flow table, each forwarding device and the initial state information of the corresponding link, and stores it.

It can be understood that when the network control device is always in the normal working state, the network control device will monitor the initial state information of each forwarding device periodically or in real time. The control device will update the flow table of each forwarding device according to the latest initial state information, generate the updated flow table, and send the updated initial state information and the updated flow table to the cooperating device, and the cooperating device will obtain the updated The updated initial state information of the flow table, each forwarding device and the corresponding link is stored. At the same time, the cooperative device can delete the previous initial state information and flow table.

It should be noted that if there is no change between the monitored initial state information and the previously monitored initial state information, it may not need to be stored in the cooperative device again, and the previous initial state information and flow table may be retained.

Specifically, if the latest initial state information of a certain forwarding device has changed compared with its corresponding previous initial state information, only the flow tables of the forwarding device and its adjacent forwarding devices can be updated, and the rest of the forwarding device A flow table without an associated forwarding device may not need to be updated. Further, the updated flow table of the forwarding device and its adjacent forwarding devices is sent to the cooperating device, and the cooperating device will replace the updated flow table and the updated initial state information of the forwarding device and its adjacent forwarding devices The previous flow table and previous initial state information of the forwarding device and its adjacent forwarding devices are stored.

It can be understood that when the network control device is in normal operation, it can monitor and collect the initial state information of each forwarding device and the corresponding link on a regular basis or in real time. If the subsequent initial state information is different from the previous initial state information, The flow table is re-updated according to the latest initial state information. Optionally, the flow table may be updated for all forwarding devices, or only for the forwarding device whose state information changes and its adjacent forwarding devices, and there is no limitation here.

It can be understood that, before the network control device fails or the bus between the network control device and each forwarding device is not disconnected, the state information acquired by the cooperative device is the initial state information, and the initial state information is based on the state of each forwarding device will also be updated. The flow table obtained by the cooperative device is the flow table corresponding to the latest initial state information. Specifically, the previous initial state information and the subsequent initial state information are all the initial state information in this step. In this step, in order to ensure that the initial state information and flow table stored by the cooperative device are more in line with the current time and environment, what the cooperative device finally stores and retains is the latest initial state information and the latest flow table generated based on the latest initial state information.

Wherein, the coordinating device can periodically or in real time obtain the flow table corresponding to each forwarding device, the initial state information of each forwarding device and the corresponding link.

S302. Monitor whether the network control device is running normally.

After the cooperative device obtains the flow table corresponding to each forwarding device, the initial state information of each forwarding device and the corresponding link, it can regularly monitor whether the network control device is running normally.

In one manner, the cooperating device sends a keep-alive message to the network control device, and the keep-alive message is used to monitor whether the network control device fails and/or whether the bus is disconnected. Specifically, the cooperative device sends a keep alive (English: keep alive) message to the network control device. When the message is transmitted to the network control device through the bus, the network control device receives the message. The keep alive message includes monitoring If the network control device fails, or if the bus is disconnected. The network control device responds to the message information, and the keep-alive message responds that the network control device is not faulty, and/or the bus is not disconnected, and everything is running normally. The network control device transmits the keep-alive message response to the cooperating device through the bus, and the cooperating device reads the keep-alive message response and determines that the network control device is running normally at this time. In another situation, when the keep-alive message is sent from the cooperating device for a period of time and no response to the keep-alive message is received, it is determined that the network monitoring device is faulty and/or the bus is disconnected.

In another way, the cooperative device is preset in advance to regularly receive the normal operation signaling sent by the network control device. When the cooperative device receives the normal operation signaling of the network control device within the preset time, it means that the network control device is in normal operation. , if the normal operation signaling of the network control device is not received after the preset time, it means that the network control device is not in normal operation.

S303. If it is determined that the network control device is not running normally, determine subsequent state information of each forwarding device and the corresponding link.

Among them, the subsequent state information of each forwarding device and the corresponding link is when the network control device is not operating normally, the cooperative device acts as part of the function of the network control device to monitor the state information of each forwarding device and the corresponding link, including whether each forwarding device A fault occurs, and/or whether the corresponding link is disconnected or not. The follow-up state information can also be continuously updated. If the follow-up state information is different from the previous follow-up state information, the cooperative device will replace the previous follow-up state information with the follow-up state information and store it.

According to the description of S302 above, in one mode, when the keep-alive message is sent from the cooperating device for a period of time, but no response to the keep-alive message is received, it is determined that the network control device is faulty and/or the bus is disconnected , the network control device is not functioning properly. Wherein, the coordinating device sends detection messages to each forwarding device periodically or in real time to determine subsequent state information of each forwarding device and the corresponding link.

In another manner, when the cooperating device does not receive the normal operation signaling of the network control device within a preset time, it means that the network control device is not in normal operation. At this time, the coordinating device sends a detection message to each forwarding device periodically or in real time, and the detection message is generally used to determine the forwarding device and the corresponding link state, as well as the number of the adjacent forwarding device. Specifically, after the cooperating device sends a detection message to its adjacent forwarding device, if the adjacent forwarding device is intact, it will continue to forward the detection message downwards, and the detection message will be forwarded at the terminal forwarding device (that is, in the network architecture). A mirror detection message is formed in the last forwarding device), and the mirror detection message is returned to the cooperating device according to the original path. The mirror detection message includes information such as the path passed by the mirror message, the forwarding device, etc. The cooperating device determines the subsequent status information of each forwarding device and the corresponding link according to the information of the mirror detection message, and the cooperating device stores the subsequent status information.

Wherein, since there is at least one forwarding device adjacent to the coordinating device, the coordinating device will send detection packets to all adjacent forwarding devices A, and each adjacent forwarding device A has multiple related Adjacent forwarding device B, and then the detection message is forwarded to all adjacent forwarding devices B, and so on, until the detection message is forwarded to the last forwarding device, and then the forwarding is stopped.

It can be understood that if a forwarding device fails or its corresponding link is disconnected, the detection message will not be forwarded to the terminal forwarding device, and the forwarding device before the faulty forwarding device or the link disconnection will stop sending After forwarding, the previous forwarding device forms a mirrored detection message, and returns the mirrored detection message to the cooperating device according to the original path.

Optionally, the coordinating device can issue a monitoring signaling that the network control device is not operating normally to each forwarding device. Corresponding to the state of the link and its adjacent forwarding device number and other commands, each forwarding device replies with a monitoring signaling image, which includes the state of each forwarding device itself, the state of the corresponding link, and the state of the adjacent forwarding device number etc. The cooperative device can receive the monitoring signaling image, and then determine the subsequent status of each forwarding device and the corresponding link, and cooperate with the device to store the subsequent status information.

It can be understood that when the network control device has not resumed normal operation, the cooperating device can determine the follow-up state information periodically or in real time. Therefore, when the follow-up state information of each forwarding device and the corresponding link is compared with the previously collected When there is a change, the previous subsequent state information can be replaced by the subsequent subsequent state information, and the subsequent subsequent state information is stored. It can be understood that the follow-up state information is actually constantly being updated, and cooperates with the device to collect and save the latest follow-up state information.

It should be noted that the purpose of cooperating with the device to obtain the latest follow-up state information is to ensure that the follow-up state information stored by itself is more in line with the current time and environment, so as to facilitate subsequent sending of accurate follow-up state information to the network control device.

S304. If it is detected that the network control device resumes normal operation, send the flow table and subsequent state information to the network control device.

Wherein, after the cooperation device sends a keep-alive message to the network control device, it is detected that the network control device resumes normal operation. The specific manifestation is: within a period of time when the cooperative device sends the keep-alive message to the network control device, the network control device has not recovered, and the cooperative device cannot receive the keep-alive message response within the preset time. The cooperating device still sends keep-alive messages periodically until one time when it sends a keep-alive message, the cooperating device receives the keep-alive message response of the keep-alive message, which means that the cooperating device monitors that the network control device resumes normal operation. Among them, the restoration of normal operation may be that the network architecture redeploys a new network control device and/or a new bus connection, or it may be that the operator has repaired the old network control device and/or bus, so that the network control device normal operation.

Further, if the cooperative device detects that the network control device resumes normal operation, the cooperative device sends the flow table and subsequent state information stored by itself to the network control device. The network control device updates the flow table of the forwarding device whose corresponding state information has changed according to the subsequent state information, and replaces the flow table sent by the cooperating device with the corresponding updated flow table, and stores the corresponding updated flow table.

Wherein, the cooperating device can send the flow table and subsequent state information to the network control device at one time.

This embodiment provides a method for controlling a forwarding device. The method is applied to a coordinating device. The coordinating device is one of multiple forwarding devices in a preset network architecture. The preset network architecture also includes a network control device. The method includes: Obtain the flow table corresponding to each forwarding device, the initial state information of each forwarding device and the corresponding link from the network control device; monitor whether the network control device is operating normally; if it is determined that the network control device is not operating normally, determine each forwarding device and subsequent state information of the corresponding link; if it is detected that the network control device resumes normal operation, the flow table and subsequent state information are sent to the network control device. In this embodiment, the flow table of each forwarding device, the initial state information of each forwarding device and the corresponding link are obtained by cooperating with the device, and stored, so as to ensure that the flow table and the initial state information are not lost; when the network control device is not operating normally, Cooperate with the equipment to collect and determine the follow-up status information of each forwarding device and corresponding link to ensure timely acquisition and storage of the follow-up status information of each forwarding device, which is conducive to the monitoring of forwarding devices and corresponding links; when the network control device resumes normal operation , the cooperating device sends the flow table and subsequent state information to the network control device, which facilitates the network control device to obtain the flow table and subsequent state information of each forwarding device in a timely and fast manner, without spending a lot of time re-obtaining the flow table and subsequent state information one by one information, saving time and improving the efficiency of obtaining status information and flow tables of all forwarding devices.

Embodiment two

Based on the description of the first embodiment, the second embodiment of the present application is further refined on the basis of the first embodiment. This embodiment is an optional implementation mode for monitoring whether the network control device is running normally, specifically including: monitoring the network control device Check whether there is a failure and monitor whether the bus between the network control equipment and each forwarding equipment is interrupted.

Specifically, if the network control device fails, and/or the bus between the network control device and each forwarding device is interrupted, the network control device cannot operate normally, so when monitoring whether the network control device is operating normally, the monitoring network Whether the control equipment fails and whether the bus between the network control equipment and each forwarding equipment is interrupted.

Among them, the bus is the main line connecting the network control device and each forwarding device. Generally, if the bus is disconnected, the communication between the network control device and each forwarding device will be disconnected. At this time, the network control device is like An isolated device cannot establish a communication connection with any forwarding device. It can be understood that even if the network control device is intact, it cannot establish a communication connection with each forwarding device, the network control device cannot monitor the status of each forwarding device, and cannot generate a new flow table.

In a feasible manner, the cooperation device may send a keep-alive message to the network control device, and the keep-alive message passes through the link between the cooperation device and the network control device, and then is transmitted to the bus and enters the network control device. If the bus is not disconnected and the network control device is intact, the keep-alive message enters the network control device. The keep-alive message includes monitoring whether the network control device fails and/or the bus is disconnected. The keep-alive message information generates a keep-alive message response, and sends the keep-alive message response to the cooperating device, and the keep-alive message response includes all normal operation information. At this time, the cooperative device receives the keep-alive message response, and confirms that the network control device is operating normally, and successfully detects that the network control device is not faulty, and the bus is not disconnected.

Similarly, if the bus is disconnected, the keep-alive message enters the bus through the link between the cooperation device and the network control device. At this time, the bus is disconnected, and the keep-alive message cannot be transmitted upwards. Generally, if the transmission of the keep-alive message is blocked on the front end of the bus, and the device has not received the keep-alive message response of the keep-alive message within a preset time, it is determined that the bus may be disconnected at this time. Among them, the front end of the bus is the dividing line between the bus and the back end of the coordinating device link. After the file is transmitted to the front end of the bus, it will not continue to be transmitted backwards. Similarly, if the network control device fails, the keep-alive message enters the bus through the link between the cooperation device and the network control device, and then enters the network control device through the bus. At this time, the network control device fails and the network control device cannot read Keep alive message. Further cooperate with the keep-alive message response that the device does not receive the keep-alive message within the preset time.

Wherein, the monitoring of the network control device by the cooperative device may be regular or real-time.

Optionally, only the network control device fails, or only the bus is disconnected, or the network control device fails and the bus is disconnected at the same time.

This embodiment provides a method for controlling a forwarding device. The method monitors whether the network control device is running normally, including: monitoring whether the network control device fails and whether the bus between the network control device and each forwarding device is interrupted. In this embodiment, the device cooperates with monitoring the network control device to determine whether the network control device is running normally. Cooperate with the equipment to conduct a comprehensive monitoring of the normal operation of the network control equipment. If the network control equipment fails and/or the bus is disconnected, it is considered that the network control equipment cannot operate normally. The comprehensive monitoring of the network control equipment facilitates the follow-up work of the equipment Unfold in time.

Embodiment Three

Fig. 4 is a schematic flowchart of a control method for a forwarding device provided in Embodiment 3 of the present application. Based on the descriptions of Embodiment 1 to Embodiment 2, Embodiment 3 of the present application is further based on any one of the above-mentioned embodiments. In detail, this embodiment is an optional implementation of monitoring whether the network control device is running normally, specifically including:

S401. Send a keep-alive message to the network control device.

Specifically, the cooperation device sends a keep-alive message to the network control device, and the keep-alive message passes through the link and the bus between the cooperation device and the network control device, and finally enters the network control device.

Specifically, the cooperating device can periodically send a keep-alive message. For example, the cooperating device is preset to send a keep-alive message to the network control device every 10 minutes. According to the actual situation, it can also be other periods, which are not mentioned here. Do limit.

S402. Determine whether a keep-alive message response is received after a preset time.

Specifically, a preset time is set in the cooperative device, and the preset time can be used to measure whether a keep-alive message response is received within this period of time. Exemplarily, the preset time may be 5 minutes, or other values.

After a preset time, the cooperating device judges whether a keep-alive message response is received. If the cooperative device receives the keep-alive message response, it judges yes, and executes S403; if the cooperative device does not receive the keep-alive message response, judges no, and executes S404.

Wherein, the keep-alive message response includes the intact state of the network control device and the bus, that is, information about the normal operation of the network control device.

S403. Determine that the network control device is running normally.

Specifically, if a keep-alive message response is received within the preset time, it indicates that the keep-alive message has entered the network control device, and the network control device forms a keep-alive message response, and returns to the cooperative network according to the original path. equipment.

It can be understood that once a keep-alive message response is formed, it means that the network control device and the bus are intact, so it can be determined that the network control device is running normally.

S404. Determine that the network control device is not running normally.

Specifically, if no keep-alive message response is received within the preset time, it can be understood that the keep-alive message is not transmitted to the bus or is transmitted to the bus but not into the network control device. In the above two cases, the network None of the control devices can receive the keep-alive message, and it is even more impossible to form a keep-alive message response. Since the keep-alive message response cannot be formed, the cooperating device cannot receive the keep-alive message response within a preset time, and the cooperating device can determine that the network control device is not operating normally.

In one case, the bus is disconnected, but the network equipment is intact. Due to the disconnection of the bus, even though the network control equipment is normal at this time, it cannot send messages for collecting and monitoring status information to each forwarding equipment. All communication data of the device cannot be sent to the forwarding device, therefore, in this case, the network control device is not operating normally.

It can be understood that the keep-alive message response is formed by the network control device, so the bus disconnection and/or the network control device failure cannot form a keep-alive message response. At this time, no matter how long the preset time is, the cooperating device will not receive a keep-alive message response, and the cooperating device determines that the network control device is not running normally.

Wherein, in order to avoid slow transmission of the keep-alive message response due to environmental changes, the preset time may be appropriately increased.

An embodiment of the present application provides a method for controlling a forwarding device. The method is used to monitor whether the network control device is running normally, including: sending a keep-alive message to the network control device; and judging whether the keep-alive message is received after a preset time Response; if it is determined that a keep-alive message response is received, it is determined that the network control device is operating normally; if it is determined that a keep-alive message response is not received, it is determined that the network control device is not operating normally. In this embodiment, by sending a keep-alive message to the network control device, it is determined whether the network control device is running normally according to whether the cooperative device has received a keep-alive message response after a preset time. If the cooperative device determines that no keep-alive message response is received, it determines that the network control device is not operating normally. Since the cooperative device judges whether it has received the keep-alive message response, it can promptly determine whether the network control device is running normally, which realizes strong real-time monitoring of the network control device and improves the functionality of the cooperative device; when the network control device When it is not running normally, it is convenient to stimulate and cooperate with the equipment to perform follow-up work.

Embodiment four

Fig. 5 is a schematic flowchart of a control method for a forwarding device provided in Embodiment 4 of the present application. Based on the descriptions of Embodiment 1 to Embodiment 3, Embodiment 4 of the present application is based on any one of the above-mentioned embodiments. In detail, this embodiment is an optional implementation manner for determining the subsequent state information of each forwarding device and the corresponding link, specifically including:

S501. Send a detection message to an adjacent forwarding device, so that the adjacent forwarding device obtains the link information passed by the detection message, carries the link information into the detection message, and continues forwarding to the forwarding device connected to it Probe message.

Wherein, the detection message is used to monitor the state of the forwarding device and the corresponding link.

Specifically, the cooperative device determines that the network control device is not operating normally, and the cooperative device immediately generates a detection message and sends the detection message to the adjacent forwarding device respectively. It can be understood that the cooperative device has at least one adjacent forwarding device , all forwarding devices adjacent to the coordinating device will obtain the detection message, and at the same time, the adjacent forwarding device can obtain the link information that the detection message passes through, and the adjacent forwarding device will carry the link information to the in the probe message. The adjacent forwarding device also has at least one adjacent forwarding device, and continues to send the detection message carrying the link information to all the adjacent forwarding devices.

Exemplarily, the coordinating device has two adjacent forwarding devices, namely forwarding device A1 and forwarding device A2, wherein the coordinating device is connected to the forwarding device A1 through a link a1, and the coordinating device is connected to the forwarding device A2 through a link a2 . Cooperate with the device to form a detection message, and send the detection message to the forwarding device A1 through the link a1, and send it to the forwarding device A2 through the link a2, and the forwarding device A1 obtains the link information A-1 passed by the detection message. The link information A-1 is that the detection message enters the forwarding device A1 through the link a1, and the forwarding device A2 obtains the link information A-2 through which the detection message passes. The link information A-2 is the link through which the detection message passes. a2 enters the forwarding device A2, the forwarding device A1 carries its link information A-1 into the detection message, and the forwarding device A2 carries its link information A-2 into the detection message. The forwarding device A1 is connected to the forwarding device B1 and the forwarding device B2 respectively, wherein the forwarding device A1 and the forwarding device B1 are connected through the link b1, and the forwarding device A1 and the forwarding device B2 are connected through the link b2, and the forwarding device A1 will carry the link The detection message of information A-1 continues to be sent to forwarding device B1 and forwarding device B2 respectively. Forwarding device B1 obtains the detection message and the link information that the detection message passes through. The link information B-1 For the detection message carrying the link information A-1 to enter the forwarding device B1 through the link b1, the forwarding device B1 carries its link information B-1 into the above detection message carrying the link information B-1, By analogy, until the detection message carrying a lot of link information is transmitted to the terminal forwarding device, or a faulty forwarding device, or a disconnected link, the forwarding of the detection message stops.

It can be understood that if one of the detection messages encounters a faulty forwarding device or a disconnected link during forwarding, the detection message will no longer be forwarded downwards, but it will not affect the rest of the faulty forwarding device and disconnection. Link-unrelated forwarding devices continue to forward downwards.

It can be understood that on the terminal forwarding device, since the terminal forwarding device is connected to at least one forwarding device, if all the forwarding devices in the entire network architecture are intact, the terminal forwarding device will receive at least one probe carrying many link information message.

S502. Receive a mirroring detection message sent by an adjacent forwarding device, where the mirroring detection message includes a forwarding link through which the mirroring detection message passes.

Specifically, if the detection message carrying many link information is forwarded to the terminal forwarding device, the terminal forwarding device will obtain the last link information that the current detection message passes through, and carry the link information to the terminal that has carried many link information. In the path information, the terminal forwarding device will sort out the link information in the detection message, and return the original path according to the sorted link information to form a mirrored detection message. Wherein, the mirror detection message includes a forwarding link through which the mirror detection message passes, and the forwarding link includes a forwarding device through which the mirror detection message passes, an input port and an output port on the forwarding device, and a passed link.

Similarly, if a forwarding device fails or the link is disconnected during the forwarding of the detection message, a forwarding device before the forwarding device fails will sort out the links carried by the detection message, And return to the original path according to the sorted link information to form a mirror detection message.

It can be understood that when the mirrored detection message is returned on the original path according to the link information, each forwarding device will record the forwarding device, the input port and output port on the forwarding device, and the link passed by the mirrored detection message. Read other information to form a forwarding link. When the forwarding device, the input port and output port on the forwarding device, and the passed link are all read when the mirror detection message of all forwarding devices on the link information passes through After extraction and integration, a complete forwarding link is formed.

Wherein, the forwarding device adjacent to the coordinating device will form a final mirror detection message, and the cooperating device receives the mirroring detection message of the forwarding device adjacent to it.

Wherein, the mirror detection message may also include link information when the detection message is forwarded.

It can be understood that all the forwarding devices, the input ports and output ports of the forwarding devices, and the links between the forwarding devices are numbered for easy identification. Wherein, the link information includes the link number, and the forwarding link includes information such as the number of the corresponding forwarding device, the numbers of the input port and the output port of the forwarding device, and the link numbers between the forwarding devices.

Exemplarily, according to the above example of S501, the cooperative device sends a detection message, and the detection message is forwarded to the forwarding device B1 through the forwarding device A1, and the link information B-1 includes: the detection message passes through the link a1 and the link b1. Among them, the forwarding device A1 has an input port a'1 and an output port A'1, and the forwarding device B1 has an input port b'1 and an output port B'1. The forwarding link of the mirror detection message includes: the mirror detection message passes through the forwarding device A1, the input port a'1 and the output port A'1, the forwarding device B1, the input port b'1 and the output port B'1, and the link a1 and link b1.

S503. Determine subsequent state information of each forwarding device and corresponding link according to the forwarding link and at least one pre-stored terminal forwarding device identifier.

Wherein, the coordinating device pre-stores at least one terminal forwarding device identifier, and generally there are two or one terminal forwarding devices, and when one of the terminal forwarding devices is selected as the coordinating device, there is one terminal forwarding device.

Further, the cooperating device determines whether each forwarding device is faulty or whether the link corresponding to the forwarding device is disconnected according to the forwarding link and at least one pre-stored terminal forwarding device identifier, and then can determine the follow-up of each forwarding device and the corresponding link. status information.

In one manner, the subsequent state information of each forwarding device and the corresponding link is determined according to the forwarding link and at least one pre-stored terminal forwarding device identifier, specifically including:

Determine whether the forwarding link includes the corresponding terminal forwarding device identifier.

If it is determined that the forwarding link does not include the corresponding terminal forwarding device identifier, determine the faulty forwarding device or disconnected link according to the forwarding link, and determine the subsequent state information of the faulty forwarding device or the corresponding disconnected link It is a fault state, and it is determined that there is no faulty forwarding device and the subsequent state information corresponding to the disconnected link is a normal state.

If it is determined that the forwarding link includes the corresponding terminal forwarding device identifier, it is determined that there is no faulty forwarding device and disconnected link in the forwarding link, and it is determined that the subsequent state information of each forwarding device and the corresponding link is in a normal state.

Specifically, the coordinating device stores the identifier of at least one destination forwarding device, and if there is a forwarding device in the forwarding link whose number is consistent with the identifier of the destination forwarding device, it means that the forwarding link includes the corresponding destination forwarding device identifier, that is, Indicates that the mirror detection packet is returned at the terminal forwarding device. It should be noted that if the forwarding links are displayed in the order of the links passed by the mirror detection message, in general, it is enough to determine whether the first forwarding device number of the forwarding link is consistent with the terminal forwarding device ID. A forwarding device number that is consistent with a pre-stored terminal forwarding device ID means that the forwarding link includes a corresponding terminal forwarding device ID. Optionally, for the sake of insurance, in case the information in the forwarding link is not recorded and stored according to the order in which the mirror detection message passes through the link, it is also possible to match the numbers of all forwarding devices in the forwarding link with the terminal forwarding device identifier to match.

Similarly, if no forwarding device number is found to match the terminal forwarding device ID in the forwarding link, it means that the mirror detection message does not return to the partner device along the original path from the terminal forwarding device, but before the terminal forwarding device. The forwarding device starts to return, which means that the detection message encounters obstacles when forwarding, and cannot reach the destination forwarding device smoothly. It can only reach the forwarding device before the destination forwarding device, and the forwarding device will return according to the link information. To cooperate with the device to form a mirror detection message, it can be determined that there is a faulty forwarding device or a disconnected link in the forwarding link. Specifically, the first forwarding device in the forwarding link returned according to the link information, the adjacent forwarding device that is not in the forwarding link is very likely to have a faulty forwarding device or a disconnected link .

Exemplarily, in the forwarding link, starting from the forwarding device 3 and returning to the cooperating device according to the original path, the forwarding link includes the forwarding device 3, the forwarding device 2 and the forwarding device 1, and the forwarding device 3 is connected to the forwarding device 2 and the forwarding device 4 , forwarding device 4 is the next forwarding device of forwarding device 3, and forwarding device 2 is the previous forwarding device of forwarding device 3. In this forwarding link, the probe message reaches forwarding device 3, but fails to continue forwarding The forwarding is completed by forwarding the detection message to the forwarding device 3. The forwarding device 3 returns to the cooperating device according to the link information and forms a mirrored detection message. The mirrored detection message contains the information passed by the mirrored detection message. forward link. It can be understood that, because the forwarding device 4 is faulty or the link between the forwarding device 4 and the forwarding device 3 is disconnected, the probe message is not forwarded to the forwarding device 4 at the forwarding device 3. According to the After knowing the information of forwarding device 3, forwarding device 2, and forwarding device 1, it can be determined that forwarding device 4 is faulty, or that there is a disconnected link between forwarding device 3 and forwarding device 4, and determine the subsequent state information of forwarding device 4 and the corresponding link to a fault state.

Among them, forwarding device 3, forwarding device 2 and forwarding device 1 are not faulty, and the link between forwarding device 1 and forwarding device 3 is not disconnected, and then it is determined that forwarding device 3, forwarding device 2, forwarding device 1 and their The subsequent state information of the corresponding link is normal state.

Specifically, if a forwarding device number is found to match the end point forwarding device ID in the forwarding link, it means that the mirror detection message is returned to the partner device along the original path from the end point forwarding device, which means that the detection message is forwarded to the end point The forwarding device returns to the cooperating device according to the original path of the link information from the terminal forwarding device to form a mirror detection message, so it can be determined that there is no faulty forwarding device or disconnected link in the forwarding link. Specifically, the forwarding link includes the terminal device and the forwarding device in front of it, which means that the forwarding link is unimpeded, and the detection message can be smoothly forwarded from the cooperative device to the terminal device, and returned by the terminal device to the cooperative device, forming a mirrored detection message. During this period, all the forwarding devices that pass through are not faulty, and the links between the passing forwarding devices are not disconnected. It can be determined that there are no faulty forwarding devices and disconnected links in the forwarding link. path, and then determine that the subsequent state information of each forwarding device and the corresponding link is in a normal state.

In the above illustrative example, if the forwarding device 3 is the terminal device, the forwarding link starts from the forwarding device 3 and returns to the cooperating device according to the original path, and the forwarding link includes the forwarding device 3, the forwarding device 2 and the forwarding device 1, Then it can be determined that forwarding device 3, forwarding device 2 and forwarding device 1 are not faulty, and the link between forwarding device 1 and forwarding device 3 is not disconnected, and then it is determined that forwarding device 3, forwarding device 2, forwarding device 1 and The subsequent state information of the corresponding link is normal state.

In this manner, determining the subsequent state information of each forwarding device and the corresponding link according to the forwarding link and at least one pre-stored terminal forwarding device ID includes: determining whether the forwarding link includes the corresponding terminal forwarding device ID; If the forwarding link does not include the corresponding terminal forwarding device identifier, then according to the forwarding link, it is determined that there is a faulty forwarding device or there is a disconnected link, and the follow-up status information of the faulty forwarding device or the corresponding disconnected link is determined to be faulty If it is determined that there is no faulty forwarding device and the subsequent state information of the corresponding disconnected link is normal; if it is determined that the forwarding link includes the corresponding terminal forwarding device identifier, then it is determined that there is no faulty forwarding device and disconnected links, and determine that the subsequent state information of each forwarding device and the corresponding link is in a normal state. In this embodiment, according to whether the forwarding link includes the identifier of the corresponding terminal forwarding device, it is determined whether there is a faulty forwarding device or a disconnected link in the forwarding link, and then the subsequent status information of the forwarding device and the corresponding link is determined. Specifically, if it is determined that the forwarding link does not include the corresponding terminal forwarding device identifier, it is determined according to the forwarding link that there is a faulty forwarding device or a disconnected link in the network architecture, and the faulty forwarding device or the corresponding link Subsequent state information is a fault state, and the forwarding device and the corresponding link in the forwarding link are forwarding devices without faults and disconnected links, then it is determined that there are no faulty forwarding devices and corresponding disconnected links The follow-up status information is normal; if it is determined that the forwarding link includes the terminal forwarding device identifier, then it is determined that there is no faulty forwarding device and disconnected link in the forwarding link, and it is determined that in the forwarding link, each forwarding device and the follow-up state information of the corresponding link are in normal state. Cooperating with the equipment to conduct comprehensive monitoring of each forwarding device and corresponding link, the subsequent status information of each forwarding device and corresponding link can be determined more accurately, and then it can be more accurately determined whether each forwarding device and corresponding link is in a fault state or normal state.

This embodiment provides a method for controlling a forwarding device. The method is used to determine the subsequent status information of each forwarding device and the corresponding link, including: sending a detection message to an adjacent forwarding device, so that the adjacent forwarding device obtains Detect the link information that the message passes through, carry the link information into the detection message, and continue to forward the detection message to the forwarding device connected to it; receive the mirror detection message sent by the adjacent forwarding device, and mirror the detection message Including the forwarding link that the mirror detection message passes through; determine the subsequent state information of each forwarding device and the corresponding link according to the forwarding link and at least one terminal forwarding device identifier stored in advance. In this embodiment, the cooperative device obtains the link information that the detection message passes through by sending a detection message to the adjacent forwarding device, and continues to send the detection message carrying the link information to the adjacent forwarding device, and cooperates with the device to receive the mirror image detection message, the mirror detection message includes the passed forwarding link, and the coordinating device determines the subsequent state information of each forwarding device and the corresponding link according to the forwarding link and at least one terminal forwarding device identifier stored in advance. Cooperate with the equipment to collect and determine the follow-up state information of each forwarding device and corresponding link, and determine the follow-up state information of each forwarding device and corresponding link according to at least one end-point forwarding device identifier, with high accuracy, and realize the monitoring of each forwarding device and corresponding link Accurate monitoring of the road.

Embodiment five

Fig. 6 is a schematic flow chart of a control method for a forwarding device provided in Embodiment 5 of the present application. Based on the descriptions of Embodiment 1 to Embodiment 4, Embodiment 5 of the present application is based on any one of the above-mentioned embodiments. In detail, this embodiment is an optional implementation of monitoring whether the network control device resumes normal operation, specifically including:

S601. Periodically send a keep-alive message to the network control device.

Among them, according to the description of the third embodiment, the cooperating device determines that the network control device is not operating normally. Send a keep-alive message to determine whether the network control device resumes normal operation. The periodic interval time can be set according to one's own needs, and there is no limitation here.

S602. After sending the keep-alive message each time, judge whether a keep-alive message response is received after a preset time.

Wherein, after sending the keep-alive message to the network control device each time, the cooperation device judges whether to receive the keep-alive message response according to a preset time.

After a preset time, the cooperating device judges whether a keep-alive message response is received. If the cooperative device receives the keep-alive message response, it judges yes; if the cooperative device does not receive the keep-alive message response, it judges no.

Wherein, the keep-alive message response includes the intact state of the network control device and the bus, and information about the network control device resuming operation.

Wherein, after the preset time, if yes, a keep-alive message response is received, and S603 is performed; if not, a keep-alive message response is not received, and S604 is performed.

S603. Determine that the network control device resumes normal operation.

Among them, a new network control device can be redeployed to take over, and/or a new bus can be used to connect the entire network architecture, or a network control device and/or bus that is not operating normally can be repaired, so that the network control device can resume normal operation .

Specifically, if a keep-alive message response is received within the preset time, it indicates that the keep-alive message has entered the network control device, and the network control device forms a keep-alive message response, and returns to the cooperative network according to the original path. equipment.

It can be understood that once a keep-alive message response is formed, it means that the network control device has resumed normal operation.

S604. Determine that the network control device has not resumed normal operation.

Specifically, if no keep-alive message response is received within the preset time, it can be understood that the keep-alive message is not transmitted to the bus or is transmitted to the bus but not into the network control device. In the above two cases, the network The control device cannot receive the keep-alive message, and it is even more impossible to form a keep-alive message response. Therefore, the cooperating device can determine that the network control device has not resumed normal operation. For specific description, refer to S304, which will not be repeated here.

It can be understood that this embodiment is consistent with the method in Embodiment 3. This embodiment is to monitor whether the network control device resumes normal operation after the network control device fails and/or the bus is disconnected. This method is the same as that in Embodiment 3. The same is true for monitoring network control devices for proper functioning.

This embodiment provides a method for controlling a forwarding device. The method monitors whether the network control device resumes normal operation, including: periodically sending a keep-alive message to the network control device; Then judge whether to receive the keep-alive message response; if it is determined that the keep-alive message response is received, it is determined that the network control device resumes normal operation; if it is determined that the keep-alive message response is not received, then it is determined that the network control device has not resumed normal operation . In this embodiment, the cooperative device periodically monitors whether the network control device resumes normal operation. If a keep-alive message response is received after a preset time, it is determined that the network control device resumes normal operation. If the keep-alive message is not received response, it is determined that the network control device has not resumed normal operation. Cooperating with the equipment to periodically monitor the network control equipment, you can know in time whether the network control equipment that was not in normal operation has resumed operation, and then cooperate with the equipment to send subsequent status information to the network control equipment in time; the way of cooperating with the equipment to monitor the network control equipment is simple, The operability is strong, and the accuracy rate of judging whether to receive the keep-alive message response is high.

Embodiment six

Based on the description of Embodiment 1 to Embodiment 5, Embodiment 6 of the present application is further refined on the basis of any one of the above embodiments. Implementation methods include:

Receive a flow table update instruction sent by the network control device, the flow table update instruction includes a new flow table corresponding to at least one forwarding device; update the flow table of the corresponding forwarding device according to the new flow table.

Specifically, when the network control device detects that at least one forwarding device is faulty or the link between the forwarding device and the adjacent forwarding device is disconnected during normal operation, the network control device will perform a flow table on the relevant forwarding device update, and store the updated flow table. At the same time, the network control device sends a flow table update instruction to the cooperation device, the flow table update instruction includes at least one new flow table corresponding to the forwarding device, and the cooperation device receives and updates the flow table update instruction sent by the network control device. Specifically, the cooperating device identifies the flow table of the forwarding device that needs to be updated in the update instruction, and finds the old flow table of the corresponding forwarding device in its own stored flow table, and performs the flow table of the corresponding forwarding device according to the new flow table. update, and store the new flow table in the partner device.

It should be noted that if the link between the forwarding device and the network control device is disconnected, the network control device can update the forwarding device and adjacent forwarding devices, and the network control device can send the updated flow table to The cooperating device is updated and stored, and at the same time, it is also sent to the forwarding device and adjacent forwarding devices. Since the link between the forwarding device and the network control device is disconnected, the forwarding device cannot receive the new flow table, but the forwarding devices adjacent to the forwarding device can receive the new flow table and make decisions according to the new flow table Forwarding of communication data.

This embodiment provides a method for controlling a forwarding device. If it is determined that the network control device is operating normally, the method further includes: receiving a flow table update instruction sent by the network control device, and the flow table update instruction includes at least one corresponding to the forwarding device. New flow table; update the flow table of the corresponding forwarding device according to the new flow table. In this embodiment, when the network control device is running normally, if the network control device detects that at least one forwarding device is faulty or the link is disconnected, it can generate a new flow table of the relevant forwarding device, and will include at least one forwarding device corresponding to The instruction of the new flow table is sent to the cooperative device, and the cooperative device receives the flow table update instruction, and updates the flow table of the corresponding forwarding device according to the new flow table, and stores it. Cooperating with the device to update and store the new flow table is beneficial to protect the latest flow table, in case the new flow table is lost, and cooperate with the device to have the function of backup and update; cooperate with the device to protect the new flow table, which is beneficial to the subsequent network control device according to the new flow table. Flow tables make decisions.

Embodiment seven

The following are device embodiments of the present application, and FIG. 7 is a schematic diagram of a control device for a forwarding device provided in Embodiment 7 of the present application. As shown in FIG. 7 , the device 700 includes the following modules.

The obtaining module 701 is configured to obtain the flow table corresponding to each forwarding device, the initial state information of each forwarding device and the corresponding link from the network control device.

A monitoring module 702, configured to monitor whether the network control device is running normally.

The determination module 703 is configured to determine subsequent state information of each forwarding device and corresponding link if it is determined that the network control device is not operating normally.

The sending module 704 is configured to send the flow table and subsequent state information to the network control device if it is detected that the network control device resumes normal operation.

In a feasible manner, the monitoring module 702 is specifically used for:

Monitor whether the network control equipment fails and whether the bus between the network control equipment and each forwarding equipment is interrupted.

In a feasible manner, the monitoring module 702 is specifically used for:

Send a keep-alive message to the network control device; judge whether a keep-alive message response is received after a preset time; if it is determined that the keep-alive message response is received, then determine that the network control device is operating normally; if it is determined that the keep-alive message is not received message response, it is determined that the network control device is not operating normally.

In a feasible manner, the determining module 703 is specifically configured to:

Send a detection message to the adjacent forwarding device, so that the adjacent forwarding device obtains the link information passed by the detection message, carries the link information into the detection message, and continues to forward the detection message to the forwarding device connected to it Receive the mirroring detection message sent by the adjacent forwarding device, the mirroring detection message includes the forwarding link through which the mirroring detection message passes; determine each forwarding device according to the forwarding link and at least one terminal forwarding device identifier stored in advance and subsequent status information of the corresponding link.

In a feasible manner, the determination module 703 is specifically used to:

Determine whether the forwarding link includes the corresponding terminal forwarding device identifier; if it is determined that the forwarding link does not include the corresponding terminal forwarding device identifier, determine that there is a faulty forwarding device or a disconnected link according to the forwarding link, and determine that there is a The faulty forwarding device or the subsequent state information corresponding to the disconnected link is in the fault state, and it is determined that there is no faulty forwarding device and the subsequent state information corresponding to the disconnected link is in the normal state; if it is determined that the forwarding link includes the corresponding terminal forwarding equipment identification, it is determined that there is no faulty forwarding equipment and disconnected link in the forwarding link, and it is determined that the subsequent state information of each forwarding equipment and the corresponding link is in a normal state.

In a feasible manner, the monitoring module 702 is specifically used for:

Periodically send a keep-alive message to the network control device; after sending a keep-alive message each time, judge whether a keep-alive message response is received after a preset time; if it is determined that a keep-alive message response is received, determine whether the network control device Resuming normal operation; if it is determined that no keep-alive message response is received, it is determined that the network control device has not resumed normal operation.

In a feasible manner, the device for controlling a forwarding device provided in this embodiment further includes: an update module.

Wherein, the update module is used to: if it is determined that the network control device is operating normally, then receive a flow table update instruction sent by the network control device, the flow table update instruction includes at least one new flow table corresponding to the forwarding device; The flow table of the corresponding forwarding device is updated.

The device for controlling a forwarding device provided in this embodiment can execute the method for controlling a forwarding device provided in any one of Embodiments 1 to 6. For specific technical solutions and effects, please refer to the relevant content of the foregoing method embodiments. Here No longer.

Embodiment eight

FIG. 8 is a schematic structural diagram of a matching device provided in Embodiment 8 of the present application. As shown in FIG. 8 , the matching device 800 includes: a processor 801, a memory 802 and a transceiver 803 connected in communication with the processor; the memory 802 stores instructions executed by the computer; the transceiver 803 is used to send and receive data; the processor 801 executes The computer stored in the memory 802 executes instructions to implement any one of the method embodiments in Embodiment 1 to Embodiment 6 above. The specific implementation manner and technical effect are similar and will not be repeated here.

Wherein, in this embodiment, the memory 802 and the processor 801 are connected through a bus. The bus may be an Industry Standard Architecture (Industry Standard Architecture, ISA for short) bus, a Peripheral Component Interconnect (PCI for short) bus, an Extended Industry Standard Architecture (EISA for short) bus, or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 8 , but it does not mean that there is only one bus or one type of bus.

Embodiment nine

The present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement any method embodiment as in the first to sixth embodiments above, and the specific implementation The method and technical effect are similar and will not be repeated here.

Other embodiments of the present application will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the application, these modifications, uses or adaptations follow the general principles of the application and include common knowledge or conventional technical means in the technical field not disclosed in the application . The specification and examples are to be considered exemplary only, with a true scope and spirit of the application indicated by the following claims.

It should be understood that the present application is not limited to the precise constructions which have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (9)

1. A method for controlling a forwarding device, wherein the method is applied to a mating device, the mating device being one of a plurality of forwarding devices in a preset network architecture, the preset network architecture further including a network control device, the method comprising:

acquiring a flow table corresponding to each forwarding device, each forwarding device and initial state information of a corresponding link from network control equipment;

Monitoring whether the network control equipment is in normal operation;

if the network control equipment is determined not to normally operate, determining the follow-up state information of each forwarding equipment and the corresponding link;

if the network control equipment is monitored to restore normal operation, the flow table and the subsequent state information are sent to the network control equipment;

the determining the subsequent state information of each forwarding device and the corresponding link includes:

sending a detection message to adjacent forwarding equipment, so that the adjacent forwarding equipment obtains link information of the detection message, carries the link information into the detection message, and continuously forwards the detection message to the forwarding equipment connected with the link information;

receiving a mirror image detection message sent by adjacent forwarding equipment, wherein the mirror image detection message comprises a forwarding link through which the mirror image detection message passes;

and determining the follow-up state information of each forwarding device and the corresponding link according to the forwarding link and at least one pre-stored destination forwarding device identifier.

2. The method of claim 1, wherein the monitoring whether the network control device is operating properly comprises:

And monitoring whether the network control equipment fails or not and monitoring whether buses between the network control equipment and each forwarding equipment are interrupted or not.

3. The method according to claim 1 or 2, wherein said monitoring whether the network control device is operating normally comprises:

sending a keep-alive message to the network control equipment;

judging whether a keep-alive message response is received after a preset time;

if the keep-alive message response is determined to be received, the network control equipment is determined to be in normal operation;

and if the keep-alive message response is not received, determining that the network control equipment is not in normal operation.

4. The method of claim 1, wherein said determining subsequent status information for each forwarding device and corresponding link based on said forwarding link and at least one pre-stored destination forwarding device identification comprises:

determining whether a forwarding link comprises a corresponding destination forwarding device identifier;

if the forwarding link does not comprise the corresponding destination forwarding equipment identifier, determining that the forwarding equipment with the fault or the link with the disconnection exists according to the forwarding link, determining that the subsequent state information of the forwarding equipment with the fault or the link with the disconnection corresponds to the fault is in a fault state, and determining that the forwarding equipment without the fault and the subsequent state information of the link with the disconnection correspond to the fault are in a normal state;

If the forwarding link is determined to include the corresponding destination forwarding device identifier, determining that no forwarding device and no disconnected link exist in the forwarding link, and determining that the subsequent state information of each forwarding device and the corresponding link is in a normal state.

5. The method of claim 1, wherein monitoring whether the network control device resumes normal operation comprises:

periodically sending a keep-alive message to the network control equipment;

after each time of sending the keep-alive message, judging whether a keep-alive message response is received after a preset time;

if the keep-alive message response is determined to be received, the network control equipment is determined to resume normal operation;

and if the keep-alive message response is not received, determining that the network control equipment does not recover normal operation.

6. The method according to any one of claims 1 or 2, wherein if it is determined that the network control device is operating normally, the method further comprises:

receiving a flow table updating instruction sent by the network control equipment, wherein the flow table updating instruction comprises a new flow table corresponding to at least one forwarding equipment;

and updating the flow table of the corresponding forwarding equipment according to the new flow table.

7. A control apparatus for a forwarding device, where the apparatus is located in a coordination device, where the coordination device is one of a plurality of forwarding devices in a preset network architecture, and the preset network architecture further includes a network control device, where the apparatus includes:

The acquisition module is used for acquiring the flow table corresponding to each forwarding device, each forwarding device and the initial state information of the corresponding link from the network control device;

the monitoring module is used for monitoring whether the network control equipment is in normal operation;

the determining module is used for determining the follow-up state information of each forwarding device and the corresponding link if the network control device is determined not to normally operate;

the sending module is used for sending the flow table and the follow-up state information to the network control equipment if the network control equipment is monitored to resume normal operation;

the determining module is further configured to send a detection message to an adjacent forwarding device, so that the adjacent forwarding device obtains link information that the detection message passes through, carries the link information into the detection message, and forwards the detection message to a forwarding device connected with the link information; receiving a mirror image detection message sent by adjacent forwarding equipment, wherein the mirror image detection message comprises a forwarding link through which the mirror image detection message passes; and determining the follow-up state information of each forwarding device and the corresponding link according to the forwarding link and at least one pre-stored destination forwarding device identifier.

8. A mating apparatus, comprising: a processor, and a memory and transceiver communicatively coupled to the processor;

the memory stores computer-executable instructions; the transceiver is used for receiving and transmitting data;

the processor executes computer-executable instructions stored in the memory to implement the method of any one of claims 1-6.

9. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-6.