CN109309617A - Disaster recovery switching method, related equipment and computer storage medium - Google Patents

Abstract

The embodiment of the invention discloses disaster tolerance switching methods, comprising: control device obtains the state of the first gateway；When the network failure of website belonging to the first gateway described in the state instruction of first gateway, router and the second gateway association in website belonging to first gateway, first gateway are belonged to different websites from second gateway by the control device.Using the embodiment of the present invention, it is able to solve the problems such as computation complexity existing in the prior art is higher, dynamic routing protocol configuration is more complicated, to reduce the complexity of disaster tolerance switching.

Description

Disaster recovery switching method, related equipment and computer storage medium

technical field

The present invention relates to the field of Internet technologies, and in particular, to a disaster-tolerant switching method, related equipment and a computer storage medium.

Background technique

In the Internet, as the scale of servers increases, the scale of data centers becomes larger and larger, and the deployment of multi-site data centers has become the main implementation method. The hardware facilities in the data center, including server clusters, etc., are distributed in different regions, that is to say, the data center can be divided into at least two sites, each site is equipped with hardware facilities, and each site is distributed in the same region or different. The data center pair can realize unified management or deployment of each site to provide external services. Among them, in order to avoid business interruption caused by a site failure, disaster recovery and high reliability can be deployed between multiple sites. Specifically, taking two sites as an example, data can be backed up between the two sites. When one site fails, the other site can provide corresponding business services, so that tenant business is not affected.

Among them, the prior art proposes the following solutions to realize handover between different sites. Specifically, FIG. 1 shows a schematic diagram of a site switching. As shown in Figure 1, each site is deployed with network devices such as gateways, virtual routers, virtual switches, and virtual machines. A global control device is deployed at the two sites, and the global control device performs unified management on the two sites of the data center. When site 1 fails, the virtual router at site 1 switches to site 2 through a dynamic routing protocol.

However, in practice, it is found that the development and configuration process of the dynamic routing protocol is relatively complicated, and it also involves relatively difficult calculations, and the computational complexity is relatively high.

SUMMARY OF THE INVENTION

The embodiment of the present invention discloses a disaster tolerance switching method, related equipment and a computer storage medium, which can solve the problems existing in the prior art, such as complicated configuration of dynamic routing protocols and high computational complexity.

In a first aspect, an embodiment of the present invention discloses and provides a disaster-tolerant switching method, and the method includes:

The control device acquires the state of the first gateway, and when the state of the first gateway indicates that the network of the site to which the first gateway belongs is faulty, the control device may put the site (specifically, the first site) to which the first gateway belongs. The router is associated with the second gateway; wherein the first gateway and the second gateway are located in different sites respectively.

By implementing the embodiments of the present invention, the control device can directly determine whether the gateway of the first site to which the first gateway belongs is faulty according to the state of the first gateway, and switch the association of the routers in the first site to the second site when the failure occurs To ensure normal communication connection and avoid interruption of tenant services. Compared with the prior art, it can solve the problems existing in the prior art, such as complicated configuration of dynamic routing protocols and high computational complexity, thereby reducing the complexity of disaster recovery switching and improving the convenience of disaster recovery switching. .

With reference to the first aspect, in a first possible implementation manner of the first aspect, the obtaining of the state of the first gateway by the control device specifically includes: the control device obtains the failure state of the first gateway, and when the state of the first gateway is the failure state , it may indicate that the network of the first site is faulty. Specifically, if the control device does not receive the notification message sent by the first gateway within a preset time period, it may determine that the state of the first gateway is a fault state; and/or, when the control device receives the failure message sent by the first gateway, it may It is determined that the state of the first gateway is a fault state. The notification message is used to notify that the network of the first site is not faulty. The failure message is used to notify that the network of the first site has failed.

By implementing the above steps, the control device can accurately determine whether the network of the first site is faulty according to the state of the first gateway, which can improve the diversity and accuracy of network fault detection.

With reference to the first aspect and the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the control device associates the router in the site to which the first gateway belongs with the second gateway, specifically The method includes: the control device generates a first forwarding table associated with the router and the second gateway, and sends the first forwarding table to the second gateway. The first forwarding table is used by the second gateway to forward the data packet in the first site to the router.

By implementing the above steps, the control device can generate the first forwarding table for the second gateway. Correspondingly, the second gateway can send the data packets in the first site to the router according to the first forwarding table, so as to realize mutual network communication. It avoids problems such as interruption and impact of tenant services in disaster recovery scenarios, thereby ensuring high reliability of business communication.

In combination with the first aspect and the first and second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the control device associates the router in the site to which the first gateway belongs with the second possible implementation manner. The gateway association specifically includes: the control device generates a second forwarding table associated with the router and the second gateway, and sends the second forwarding table to the router. The second forwarding table is used by the router to forward the data packet in the first site to the second gateway.

By implementing the above steps, the control device can also generate a second forwarding table for the router. Correspondingly, the router can send the data packet in the first site to the second gateway according to the second forwarding table, so as to realize mutual network communication. It avoids problems such as interruption and impact of tenant services in disaster recovery scenarios, thereby ensuring high reliability of business communication.

In a possible implementation manner combining the first aspect and any one or more of the first to third aspects of the first aspect, in a fourth possible implementation manner of the first aspect, the first gateway may pass The detection message monitors whether the network of the site (the first site) to which the first gateway belongs is faulty, and further may send a fault message and/or a notification message to the control device. It is convenient for the control device to determine the state of the first gateway according to the fault message and/or the notification message, so as to realize the subsequent disaster tolerance switching, which improves the network fault detection efficiency compared with the method of switching the gateway using the dynamic routing protocol in the prior art. Convenience and variety.

In a second aspect, an embodiment of the present invention provides a control device, including an acquisition module and an association module, wherein,

an acquisition module for acquiring the state of the first gateway;

an association module, configured to associate the router in the site to which the first gateway belongs to the second gateway when the state of the first gateway indicates that the network of the site to which the first gateway belongs is faulty, and the first gateway and the second gateway belong to different sites .

With reference to the second aspect, in a first possible implementation manner of the second aspect, the acquisition module is specifically configured to acquire a fault state of the first gateway, wherein the fault state is used to indicate that the control device has not received the first gateway within a preset time period. A notification message sent by the gateway, where the notification message is used to notify that the network of the site to which the first gateway belongs is not faulty, and/or the fault status is used to indicate that the control device receives the fault message sent by the first gateway, and the fault message is used to notify The network of the site to which the first gateway belongs has failed.

In combination with the second aspect and the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the router in the site to which the first gateway belongs is associated with the second gateway, Specifically, it includes: generating a first forwarding table associated with the router and the second gateway, where the first forwarding table is used by the second gateway to forward the data packets in the site to which the first gateway belongs to the router; the association module is further configured to send data packets to the second gateway the first forwarding table.

In combination with the second aspect and the first and second possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the router in the site to which the first gateway belongs is associated with the third possible implementation manner. The association of two gateways specifically includes: generating a second forwarding table associated with the router and the second gateway, where the second forwarding table is used by the router to forward the data packets in the site to which the first gateway belongs to the second gateway; the association module is further configured to forward to the second gateway; The router sends the second forwarding table.

For content not shown or described in the embodiments of the present invention, reference may be made to the relevant description of the method described in the foregoing first aspect or any possible implementation manner of the first aspect, which will not be repeated here.

In a third aspect, an embodiment of the present invention provides a computing device, each computing device includes: a processor, a memory, a communication interface, and a bus; the processor, the communication interface, and the memory communicate with each other through the bus; a communication interface is used for receiving and sending data; a memory for storing instructions; and a processor for invoking program instructions in the memory to execute the method described in the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, a computer non-transitory storage medium is provided, and the computer non-transitory storage medium stores program codes for disaster recovery switching. The program code comprises instructions for carrying out the method described in the first aspect above or in any possible implementation of the first aspect.

In a fifth aspect, a chip product is provided to perform the method in the first aspect or any possible implementation manner of the first aspect.

By implementing the embodiments of the present invention, the problems existing in the prior art, such as high computational complexity and complex dynamic routing protocol configuration, can be solved, thereby reducing the complexity of disaster tolerance switching.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required in the description of the embodiments or the prior art.

FIG. 1 is a schematic diagram of a site switching provided in the prior art.

FIG. 2 is a schematic diagram of a network framework of a disaster-tolerant switching system provided by an embodiment of the present invention.

FIG. 3 is a schematic diagram of a scenario of a disaster-tolerant handover provided by an embodiment of the present invention.

FIG. 4 is a schematic diagram of a network framework of another disaster-tolerant switching system provided by an embodiment of the present invention.

FIG. 5 is a schematic flowchart of a disaster-tolerant switching method provided by an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a control device provided by an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a computing device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the present invention.

In order to solve the problems of complex configuration of dynamic routing protocols and high computational complexity in the prior art, the present application proposes a method for disaster tolerance handover, a network framework, application scenarios and related equipment to which the method is applicable. First, referring to FIG. 1 , it is a schematic diagram of a network framework of a disaster-tolerant switching system provided by an embodiment of the present invention. As shown in FIG. 2 , the disaster recovery switching system 100 includes a control device 12 and at least two sites 14 managed by the control device 12 (two sites, the first site and the second site are shown as examples in the figure). in,

The control device 12 is deployed across sites, and the control device 12 may be a global control device of the at least two sites, or may be a cluster composed of control components deployed correspondingly at each site. When control components are deployed at each site, the failure of one site allows the other site to function normally. In other words, after the control component deployed on one site fails, the control component deployed on the other site can run normally without affecting the normal operation of the control device.

The at least two sites 14 are located in the same data center, which may specifically be a data center or a cloud platform provided by the same manufacturer. A gateway 140, a router 142, a switch 144, and a virtual machine 146 (virtual machine, VM) are deployed in each site. One or more routers 142 may be associated with one gateway 140 . The router 142 sends the received message to the device outside the site through the associated gateway 140 , and the network 140 sends the message received from the device outside the site to the associated router 142 . The multiple routers 142 associated under the same gateway 140 may be routers deployed in the same site, or may be distributed routers across sites, which are not limited in this application. A router can communicate with one or more switches, and accordingly a switch supports communication with one or more routers. One or more virtual machines can be deployed or managed under a switch. Besides, the data center in this embodiment also includes at least one physical machine not shown in FIG. 2 . Each physical machine is connected to switches and routers in the data center, and communicates externally with devices outside the site where the physical machine is located through a gateway associated with the router.

In practical applications, one or more virtual machines can be created or deployed on the same physical device (such as a physical host or server), and these virtual machines are mounted on a switch or a router, as shown in the figure. The router in this application may specifically be a virtual router or a physical router, and the switch may specifically be a virtual switch or a physical switch, which is not limited in this application.

Optionally, a layer-2 network agent device 148 (I2-agent), a layer-3 network agent device 150 (I3-agent), and a gateway agent device 152 may also be deployed in each site. The Layer 2 network proxy device 148 is used to manage the switch 144, for example, communicate with the virtual interactive machine through the Layer 2 network proxy device, configure a corresponding Layer 2 forwarding table for the switch, and the like. The Layer 3 network proxy device 150 is used to manage the router 142, for example, communicate with the router through the Layer 3 network proxy device, configure a corresponding Layer 3 forwarding table for the router, and the like. The gateway proxy device 152 is used for managing the gateway 140, for example, communicating with the gateway through the gateway proxy device, configuring corresponding forwarding tables for the gateway, etc., and how to configure and update various forwarding tables will be described in detail below.

In practical applications, the Layer 2 network proxy device, the Layer 3 network proxy device, and the gateway proxy device may specifically be software modules or hardware units deployed on computing nodes, which are not limited in this application. Generally, a layer-2 network proxy device, a layer-3 network proxy device, or a gateway proxy device may be correspondingly deployed on a computing node, which will not be described and limited here.

In Figure 2, each site includes a computing node and a gateway node. The computing node can communicate with the gateway node through a tunnel. The tunnel here refers to the tunneling technology adopted by the virtual network, such as virtual extensible local area network (VXLAN). ) tunnel, routing encapsulation (generic routing encapsulation, GRE) tunnel, etc. A virtual machine is deployed on a computing node (specifically, a physical device) to run tenant services. The gateway node (specifically, a gateway) carries north-south traffic, that is, traffic of the virtual machine accessing the external network (Internet) or the external network accessing the virtual machine. In the actual communication process, the network where the virtual machine is located is a private network, that is, the virtual machine is connected to the internal private network, and switches and routers are deployed on the private network. The router can access the external network (referred to as the external network) through the gateway.

In this application, each router may be maintained or configured with two gateways, a first gateway and a second gateway, which may also be referred to as a primary gateway and a backup gateway. For example, the gateways 140 of the two sites in the illustration may be configured as the active and standby gateways of a certain router 142 . Usually, the router accesses the external network through the first gateway (main gateway), that is, the first gateway carries the traffic of the router. The second gateway (standby gateway) has no communication traffic. When the first gateway fails, the router can be switched to the second gateway, so as to realize network communication through the second gateway, so as not to affect the tenant's business.

Optionally, the first gateway may specifically be the gateway of the site where the router is currently located. The second gateway is configured by the system according to actual needs, or customized by the user according to actual needs or personal preferences. The first gateway and the second gateway are located in different sites.

The two gateways configured on the same router are different. The two gateways configured on different routers can be the same or different. When the routers of the two sites in the figure have different primary gateways and backup gateways, the two sites provide corresponding business services at the same time. In other words, the primary gateway configured by a router in the first site is the standby gateway configured by another router in the second site.

The associated routers under the same gateway may be routers at the same site, or may be distributed routers across sites, which are not limited in this application. In addition, in this application, the virtual machine (or the tenant) does not perceive the existence of the gateway, that is, does not perceive the existence of the active and standby gateways.

Next, the application scenarios to which this application is applicable are introduced. Specifically, FIG. 3 takes two sites as an example, and specifically shows a schematic diagram of a scenario of disaster recovery handover. As shown in FIG. 3 , when the first site fails (or hangs up), the detection module (monitor) of the gateway 1 in the site can detect that the network egress is blocked and a failure occurs. At this time, a fault message may be sent to the control device, where the fault message is used to notify that the network in the first site has a fault. Correspondingly, the control device can switch all or part of the routers associated with the gateway 1 to the gateway 2 in the second site, so as to facilitate subsequent implementation of corresponding service communication through the gateway 2 . Optionally, the updating of the forwarding table of the gateway 2 and the respective forwarding tables of all or some routers is triggered at the same time, which will be described in detail below.

There are various reasons for the failure of the first site, such as power failure and problems with the gateway 1, etc., which are not described in detail or limited in this application. When the first site fails, in order to ensure that tenant services are not affected, it is necessary to ensure that network devices such as virtual machines, switches, and routers involved in the control plane layer in the first site operate normally, and then switch over the gateway and use the newly switched gateway. Business communications accordingly. For example, when the first site is powered off, the network devices in the first site cannot operate normally. To ensure the normal use of tenant services, network devices with the same service services need to be deployed on other physical devices. The network devices here may specifically include but are not limited to virtual machines, switches, and routers. Alternatively, the network devices in the first site need to be re-created or restored on other physical devices, and this application will not describe in detail how to create these network devices. The network devices created at the second site are the same as the original network devices of the first site. Accordingly, the gateway 1 in the first site can detect the failure of the first site through the detection module, and all routers associated with the gateway 1 (This includes the newly created router) Switch to gateway 2, and network communication can be performed through gateway 2.

Therefore, it should be noted that the network devices (specifically, virtual machines, switches, routers, etc.) involved in this application are deployed in a distributed manner. As shown in FIG. 4 , taking n sites as an example, the illustrated part shows a situation in which switches are deployed in a distributed manner. When site 2 fails, one case is that gateway 2 in site 2 fails, then the router associated with gateway 2 can be switched to the gateway of another site, for example, under gateway 1 of site 1 in the figure, so as to Subsequently, the corresponding communication connection is restored through the gateway 1 . Another situation is that after the network device at site 2 fails, because the network devices are deployed in a distributed manner, when the network device at site 2 fails, the network device associated with gateway 2 at site 1 operates normally, which can also guarantee normal operation of the business. That is, the network devices on the control plane are guaranteed to work normally. Correspondingly, at this time, the router in the site 1 associated with the gateway 2 can also be switched to the gateway of another site, so as to realize the corresponding communication connection.

In addition, the network device described in the embodiment of the present invention may be a virtual network device or a physical network device, which is not limited in this embodiment of the present invention.

Next, referring to FIG. 5 , it is a schematic flowchart of a disaster-tolerant switching method provided by an embodiment of the present invention. The method is applied to a data center including a first site, a second site and a control device, and the first site and the second site are controlled by the control device, that is, the control device can manage the the first site and the second site. The data center may be the data center shown in FIG. 2 , FIG. 3 or FIG. 4 , and correspondingly, the control device may be the control device 12 shown in FIG. The control unit or the control unit in the data center shown in Figure 4. The first site is deployed with a first gateway, and the second site is deployed with a second gateway. The method shown in Figure 5 may include the following implementation steps:

Step S101, the first gateway sends a first message to the control apparatus, where the first message is used to indicate the state of the first gateway. Correspondingly, the control device receives the first message to learn the state of the first gateway.

In the present application, the first gateway can detect the state of its own network exit in real time or periodically through detection packets, that is, the state of the first gateway, to determine whether the network of the first site where the first gateway is located is faulty. The state of the first gateway includes a fault state and a normal state, and the fault state is used to indicate that the network of the first site where the first gateway is located is faulty. The normal state is used to indicate that the network of the first site where the first gateway is located is not faulty.

Step S102, the control apparatus acquires the state of the first gateway.

Step S103: When the state of the first gateway indicates that the network of the first site to which the first gateway belongs is faulty, the control device associates the router in the first site with the second gateway, and the first gateway and the second gateway belong to different sites.

When it is determined that the network to the first site is faulty, the control device can switch the router in the first site to the second gateway, so as to perform network communication through the second gateway. It prevents problems such as service interruption at the first site after the failure of the first site, and effectively ensures high reliability of service communication.

Some specific embodiments and optional embodiments involved in the present application are described below.

In step S101, the first gateway may monitor the state of the first gateway (specifically, the state of the network exit) periodically or in real time to determine whether the network of the first site where the first gateway is located is faulty. There are various implementations of monitoring the status of the gateway. For example, the first gateway sends a detection message to the preset device, and if no response message is received within a period of time, it can be determined that the state of the first gateway is a fault state , the fault state is used to indicate that the network of the first site is faulty. Otherwise, it may be determined that the state of the first gateway is a normal state, where the normal state is used to indicate that the network of the first site is not faulty. For another example, the first gateway may periodically send detection packets to the preset device, and determine the state of the first gateway by detecting the number of times of receiving response packets, etc., which are not described or limited in this application.

Correspondingly, after the first gateway monitors the state of the first gateway (that is, whether the network of the first site where the first gateway is located is faulty), it can send a first message to the control device to notify or instruct the Describe the state of the first gateway.

Specifically, when the first gateway monitors that the state of the first gateway is a normal state, that is, the network of the first site is not faulty, the first message may be sent to the control device. The first message here may specifically be a notification message. The notification message is used to notify that the network of the first site is not faulty, or notify that the state of the first gateway is a fault state. It is understandable that, due to reasons such as failure of the network or the first gateway, the control device may not receive the notification message within a preset period of time. The preset duration is set by the user or the system, for example, 1 minute.

Optionally, after the first gateway monitors that the state of the first gateway is a fault state, that is, after the network of the first site is faulty, it may send a first message to the control device, where the first message may specifically be: failure message. The failure message is used to notify that the network of the first site has failed.

Alternatively, after monitoring the state of the first gateway, the first gateway may send a first message (specifically, a notification message) to the control device. The notification message here is used to notify the state of the first gateway, or used to notify whether the network of the first site is faulty, etc., which is not limited in this application.

Correspondingly, in step S102, after receiving the first message, the control device can obtain the state of the first gateway according to the first message, and then learn whether the network of the first site is faulty. Specifically, when the state of the first gateway is a fault state, the control device may determine that the network of the first site is faulty. Wherein, the fault status can be specifically used to indicate any one or a combination of the following two situations: first, the control device receives a fault message sent by the first gateway, and the fault message is used to indicate the first site 's network has failed. In the second type, the control device does not receive a notification message sent by the first gateway within a preset time period, where the notification message is used to indicate or notify that the network of the first site is faulty.

Correspondingly, when the state of the first gateway is a normal state, the control device may determine that the network of the first site is not faulty, and at this time, the process may be ended. Wherein, the normal state refers to the remaining states except the fault state. Exemplarily, the normal state can be specifically used to indicate any one or a combination of the following two situations: First, the control apparatus does not receive the failure message sent by the first gateway. Second, the control device receives the notification message sent by the first gateway within a preset time period. For the fault message and the notification message, reference may be made to the foregoing embodiments, and details are not repeated here.

In step S103, the network devices (specifically, virtual machines, switches, and routers) involved in the control plane of the present application are all distributed deployment. Since the virtual machines, switches, and routers in the first site are deployed in a distributed manner, when one network device (such as a router) of the same type fails or hangs up, the other network device (router) can also run normally. Affect the normal operation of the control plane. Therefore, after the network of the first site fails, the router associated with the first gateway can be switched to the second gateway, so as to perform corresponding network communication through the second gateway. Here, the number of routers associated under the first gateway may be one or more, which is not limited. Hereinafter in this application, a router is used as an example to describe the related content.

In some embodiments, after switching the router associated with the first gateway to the second gateway, the control device can generate a corresponding first forwarding table for the second gateway. In other words, the control device may generate a first forwarding table associated with the router and the second gateway. Wherein, the first forwarding table is used to establish a communication connection between the router and the second gateway. Specifically, the second gateway may forward the data packet in the first site to the router according to the first forwarding table; or forward the data packet from the router, or the like. In other words, the first forwarding table is used by the second gateway to forward the data packets in the first site to the router. The first forwarding table here may specifically be a forwarding table of the gateway (also referred to as a north-south forwarding table).

Correspondingly, after generating the first forwarding table, the control device sends the first forwarding table to the second gateway, so that the second gateway can update its own forwarding table according to the first forwarding table, and subsequently establish and router based on the updated forwarding table. communication connection between.

In some embodiments, after switching the router associated with the first gateway to the second gateway, the control device can generate a corresponding second forwarding table for the router. In other words, the control device may generate a second forwarding table associated with the router and the second gateway. Wherein, the second forwarding table is used to establish a communication connection between the router and the second gateway. Specifically, the router may forward the data packets in the first site to the second gateway according to the second forwarding table; or forward the data packets from the second gateway, and so on. In other words, the second forwarding table is used by the router to forward the data packets in the first site to the second gateway. The second forwarding table here may specifically be a Layer 3 forwarding table of a router, such as a flow table or a routing table, which will be described in detail below in this application.

Correspondingly, after generating the second forwarding table, the control device sends the second forwarding table to the router, so that the router can update its own forwarding table according to the first forwarding table, and subsequently establish communication with the router according to the updated forwarding table. connect.

In an optional embodiment, step S101 also involves a configuration process of a network device, and the specific implementation steps are as follows. The network devices here may specifically include, but are not limited to, switches, routers, virtual machines, and the like.

Step S201: The control apparatus creates a virtual machine according to the first creation request, and configures a corresponding switch and router for the virtual machine.

The control device may receive a first creation request input by a user, for requesting to create a virtual machine in the first site and configure corresponding switches and routers for the virtual machine. Correspondingly, after receiving the first creation request, the control apparatus may create a corresponding virtual machine, and designate or configure a corresponding router and virtual machine for the virtual machine, so as to create or form a communication link.

Step S202: The control device sends a first configuration message to the switch, which is used to configure the Layer 2 forwarding table of the switch.

After specifying the switch, the control device may send a first configuration message to the switch (specifically, the layer 2 network proxy device corresponding to the switch), for configuring the layer 2 forwarding table of the switch. Correspondingly, after receiving the first configuration message, the Layer 2 network proxy device configures the Layer 2 forwarding table of the switch according to the instruction of the first configuration message.

Exemplarily, the following Table 1 presents a Layer 2 forwarding table based on a virtual local area network (virtual local area network, VLAN).

Table 1

Destination address address type VLAN destination port

As can be seen from Table 1 above, the Layer 2 forwarding table of the switch may include the destination address, destination port, address type, and virtual local area network VLAN. The destination address refers to the destination address or destination network to which the data packet is sent. The destination port refers to the destination port to which the data packet arrives. The address type refers to the category to which the destination address (IP address) belongs. VLAN refers to the virtual local area network in which the communication resides. The destination port refers to the destination port for sending the data packet, which is not described in detail or limited in this application.

Step S203, the control device creates a router according to the second creation request, and configures a first gateway (main gateway) for the router.

The control device receives the second creation request input by the user. The second creation request is used to request to create a corresponding router, and to designate or assign a corresponding master gateway (first gateway) to the router. Correspondingly, after receiving the second creation request, the control device creates a corresponding router according to the instruction of the second creation request, and allocates a corresponding first gateway to the router.

Step S204: The control device sends a second configuration message to the router, which is used to configure the Layer 3 forwarding table of the router.

After specifying the first gateway for the router, the control device may send a second configuration message to the router (specifically, the layer-3 network proxy device corresponding to the router) for configuring the layer-3 forwarding table of the router. Correspondingly, after receiving the second configuration message, the Layer 3 network proxy device can configure the Layer 3 forwarding table of the router according to the instruction of the second configuration message. Wherein, the three-layer forwarding table is used to establish a communication connection between the router and the first gateway. In other words, the router can forward the data packets received by itself according to the Layer 3 forwarding table. The Layer 3 forwarding table of the router may specifically be a routing table or a flow table (for example, an openflow flow table) of the router, which is not limited in this application.

Exemplarily, the following Table 2 shows a routing table.

Destination address netmask routing cost output port Next-hop IP address

As can be seen from Table 2 above, the routing table of the router includes the destination address, network mask, routing cost, output port, and next-hop IP address. The output port refers to the interface to which the data packet is forwarded. The destination address refers to the destination address or destination network to which the data packet is sent. The netmask refers to the address which, together with the destination address, identifies the network segment where the destination host or router is located. This application does not make detailed descriptions and limitations here.

Table 3 below shows an openflow flow table.

header field counter action

As can be seen from Table 3 above, the openflow flow table may include header fields, counters, and actions. Among them, the header field is the identifier of the flow table. Counters are used to calculate flow table statistics. The action indicates the operation to be performed by the data packet matching the flow table, which is not described in detail here in this application.

Step S205: The control apparatus sends a third configuration message to the first gateway, for configuring the forwarding table of the first gateway.

After specifying the first gateway for the router, the control apparatus may send a third configuration message to the first gateway (specifically, a gateway proxy device corresponding to the first gateway). Correspondingly, the gateway proxy device receives the third configuration message, and configures a corresponding forwarding table (also referred to as a north-south forwarding table) for the first gateway according to the instruction of the third configuration message. The north-south forwarding table is used for forwarding data packets from the router, or sending received data packets to the router.

By implementing the embodiment of the present invention, after detecting the network failure of the site where the gateway is located, the router in the site can be switched to other gateways by using the detection message, so as to ensure normal network communication and not affect tenant services. It can solve the problems existing in the prior art, such as complicated configuration of dynamic routing protocols and high computational complexity, thereby reducing the complexity of disaster recovery switching and improving the convenience of disaster recovery switching.

With reference to the relevant descriptions in the embodiments of FIG. 1 to FIG. 5 above, relevant devices and systems applicable to the present application are introduced below. Please refer to FIG. 6 , which is a schematic structural diagram of a control device provided by an embodiment of the present invention. The control device 600 shown in FIG. 6 includes an acquisition module 602 and an association module 604 . in,

The obtaining module 602 is configured to obtain the state of the first gateway;

The associating module 604 is configured to associate the router in the site to which the first gateway belongs with the second gateway when the state of the first gateway indicates that the network of the site to which the first gateway belongs is faulty. The first gateway and the second gateway belong to different sites.

In a possible implementation manner, the acquiring module 602 is specifically configured to acquire a fault state of the first gateway, wherein the fault state is used to indicate that the control device has not received the first gateway within a preset period of time a notification message sent by the gateway, where the notification message is used to notify that the network of the site to which the first gateway belongs is not faulty, and/or the control device receives the fault message sent by the first gateway, the fault The message is used to notify that the network of the site to which the first gateway belongs is faulty.

In a possible implementation manner, the association module 604 is specifically configured to generate a first forwarding table associated with the router and the second gateway, where the first forwarding table is used by the second gateway to associate the The data packets in the site to which the first gateway belongs are forwarded to the router; the first forwarding table is sent to the second gateway.

In a possible implementation manner, the association module 604 is specifically configured to generate a second forwarding table associated with the router and the second gateway, where the second forwarding table is used by the router to associate the first forwarding table with the first forwarding table. The data packets in the site to which the gateway belongs are forwarded to the second gateway shown; and the second forwarding table is sent to the router.

The control device provided in this embodiment of the present invention may specifically be the control device in the embodiment shown in FIG. 2 , which may be used to execute all or part of the implementation steps in the method embodiment described in FIG. 5 above. For the parts not shown or described in the embodiments of the present invention, reference may be made to the relevant descriptions in the embodiments described in the foregoing FIG. 1 to FIG. 5 , and details are not repeated here.

Please refer to FIG. 7 , which is a schematic diagram of a computing device provided by an embodiment of the present invention. As shown in FIG. 7 , the computing device 1000 provided by the present application includes one or more processors 701, a communication interface 702, and a memory 703. The processor 701, the communication interface 702, and the memory 703 may be connected by a bus or in other ways. The present invention The embodiment takes the connection through the bus 704 as an example. in:

The processor 701 may be composed of one or more general-purpose processors, such as a central processing unit (Central Processing Unit, CPU). The processor 701 can be used to run a program of any one or more of the following functional modules in the relevant program code: an acquisition module, an association module, and the like. That is, the processor 701 executes the program code to implement any one or more functions of the acquisition module and the associated module and other functional modules. For details about the acquisition module and the association module, reference may be made to the relevant descriptions in the foregoing embodiments.

Communication interface 702 may be a wired interface (eg, an Ethernet interface) or a wireless interface (eg, a cellular network interface or using a wireless local area network interface) for communicating with other modules/devices. For example, the communication interface 602 in this embodiment of the present application may be specifically configured to receive a fault message or a notification message sent by the first gateway.

The memory 703 may include a volatile memory (Volatile Memory), such as a random access memory (Random Access Memory, RAM); the memory may also include a non-volatile memory (Non-Volatile Memory), such as a read-only memory (Read-Only Memory) , ROM), flash memory (Flash Memory), hard disk (Hard Disk Drive, HDD) or solid-state drive (Solid-State Drive, SSD); the memory 703 may also include a combination of the above-mentioned types of memory. The memory 703 may be used to store a set of program codes, which may be codes that provide control means as shown in FIG. 6 so that the processor 701 invokes the program code stored in the memory 703 to execute the control as shown in FIG. 6 . The means; the program code may be code for executing the method as shown in FIG. 5 , so that the processor 701 calls the program code stored in the memory 703 to execute the method as shown in FIG. 5 above.

It should be noted that FIG. 7 is only a possible implementation manner of the embodiment of the present application. In practical applications, the computing device may further include more or less components, which is not limited here. For content not shown or described in the embodiments of the present application, reference may be made to the relevant descriptions in the embodiment shown in FIG. 5 , which will not be repeated here.

Embodiments of the present invention further provide a computer non-transitory storage medium, where program codes are stored in the computer non-transitory storage medium. The program code includes instructions for executing the method described above in FIG. 5 , which, when executed on a processor, enables the method flow shown in FIG. 5 .

The embodiment of the present invention further provides a computer program product, when the computer program product runs on a processor, the method flow shown in FIG. 5 is implemented.

The steps of the method or algorithm described in conjunction with the disclosure of the embodiments of the present invention may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, read only memory (Read Only Memory, ROM), erasable programmable read only memory ( Erasable Programmable ROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disks, removable hard disks, compact disks (CD-ROMs), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC. Additionally, the ASIC may reside in a computing device. Of course, the processor and storage medium may also exist in the computing device as discrete components.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program is During execution, it may include the processes of the embodiments of the above-mentioned methods. The aforementioned storage medium includes various media that can store program codes, such as ROM, RAM, magnetic disk, or optical disk.

Claims (14)

1. A disaster recovery switching method, comprising:

acquiring the state of a first gateway;

when the state of the first gateway indicates that the network of the site to which the first gateway belongs has a fault, the control device associates a router in the site to which the first gateway belongs with a second gateway, and the first gateway and the second gateway belong to different sites.

2. The method of claim 1, wherein obtaining the status of the first gateway comprises:

the method comprises the steps of obtaining a fault state of a first gateway, wherein the fault state is used for indicating that a control device does not receive a notification message sent by the first gateway within a preset time length, the notification message is used for notifying that a network of a site to which the first gateway belongs does not have a fault, and/or the fault state is used for indicating that the control device receives a fault message sent by the first gateway, and the fault message is used for notifying that the network of the site to which the first gateway belongs has a fault.

3. The method according to claim 1 or 2, wherein associating the router in the site to which the first gateway belongs with the second gateway specifically comprises:

generating a first forwarding table associated with the router and the second gateway, wherein the first forwarding table is used for the second gateway to forward data packets in a station to which the first gateway belongs to the router;

sending the first forwarding table to the second gateway.

4. The method according to any one of claims 1 to 3, wherein associating the router in the site to which the first gateway belongs with the second gateway specifically comprises:

generating a second forwarding table associated with the router and the second gateway, wherein the second forwarding table is used for forwarding a data packet in a site to which the first gateway belongs to the router to the second gateway;

and sending the second forwarding table to the router.

5. The method according to any one of claims 2-4, further comprising:

the first gateway monitors whether a network of a site to which the first gateway belongs has a fault or not through a detection message;

the first gateway sends the failure message and/or the notification message to the control device.

6. A control device, characterized in that the control device comprises an acquisition module and an association module, wherein,

the acquisition module is used for acquiring the state of the first gateway;

the association module is configured to associate a router in a site to which the first gateway belongs with a second gateway when the state of the first gateway indicates that a network of the site to which the first gateway belongs has a fault, where the first gateway and the second gateway belong to different sites.

7. The control device according to claim 6,

the obtaining module is specifically configured to obtain a fault state of a first gateway, where the fault state is used to indicate that the control device does not receive a notification message sent by the first gateway within a preset time period, where the notification message is used to notify that a network of a site to which the first gateway belongs does not fail, and/or the fault state is used to indicate that the control device receives a fault message sent by the first gateway, and the fault message is used to notify that the network of the site to which the first gateway belongs fails.

8. The control device according to claim 6 or 7,

associating the router in the site to which the first gateway belongs with the second gateway specifically includes: generating a first forwarding table associated with the router and the second gateway, wherein the first forwarding table is used for the second gateway to forward data packets in a station to which the first gateway belongs to the router;

the association module is further configured to send the first forwarding table to the second gateway.

9. The control device according to any one of claims 6 to 8,

associating the router in the site to which the first gateway belongs with the second gateway specifically includes: generating a second forwarding table associated with the router and the second gateway, wherein the second forwarding table is used for forwarding a data packet in a site to which the first gateway belongs to the router to the second gateway;

the association module is further configured to send the second forwarding table to the router.

10. A computing device comprising a processor and a memory, wherein,

the memory for storing program code;

the processor executing code in the memory for:

acquiring the state of a first gateway;

and when the state of the first gateway indicates that the network of the site to which the first gateway belongs has a fault, associating a router in the site to which the first gateway belongs with a second gateway, wherein the first gateway and the second gateway belong to different sites.

11. The computing device of claim 10,

the acquiring the state of the first gateway specifically includes: the method and the device for controlling the network failure of the first gateway are used for acquiring a failure state of the first gateway, wherein the failure state is used for indicating that the control device does not receive a notification message sent by the first gateway within a preset time length, the notification message is used for notifying that the network of a site to which the first gateway belongs does not fail, and/or the control device receives a failure message sent by the first gateway, and the failure message is used for notifying that the network of the site to which the first gateway belongs fails.

12. The computing device of claim 10 or 11,

associating the router in the site to which the first gateway belongs with the second gateway specifically includes:

generating a first forwarding table associated with the router and the second gateway, wherein the first forwarding table is used for the second gateway to forward data packets in a station to which the first gateway belongs to the router;

sending the first forwarding table to the second gateway.

13. The computing device of claims 10-12,

associating the router in the site to which the first gateway belongs with the second gateway specifically includes:

generating a second forwarding table associated with the router and the second gateway, where the second forwarding table is used for the router to forward a data packet in a site to which the first gateway belongs to the second gateway;

and sending the second forwarding table to the router.

14. A computer non-transitory storage medium storing a computer program, wherein the computer program when executed by a computing device implements the method of any of claims 1 to 5.