WO2017000550A1

WO2017000550A1 - Method and device for switching between primary and backup link and realizing redundancy backup of link

Info

Publication number: WO2017000550A1
Application number: PCT/CN2016/072690
Authority: WO
Inventors: 江启运; 汤渊清
Original assignee: 北京东土科技股份有限公司
Priority date: 2015-07-02
Filing date: 2016-01-29
Publication date: 2017-01-05
Also published as: CN105099771B; CN105099771A

Abstract

Embodiments of the present invention disclose methods and devices for switching between a primary link and backup link and realizing redundancy backup of a link. A method for switching between a primary link and backup link is applied in a first switch, and can comprise the following steps: receiving a failure communication packet; searching, according to port numbers of ports for corresponding links allocated by respective backup groups and recorded in a local configuration information table, for a corresponding port; and configuring the found port to be in an open state, such that a first link connected to the port is in a connected state. A method for realizing redundancy back of a link is applied in the first switch, and can comprise the following steps: monitoring a link state of a DRP ring network link of the first switch, the DRP ring network link being connected to a second switch; searching for all ports in a blocked state; and selecting one port from the found ports to configure the selected port to be in an open state. The technical solutions provided in the embodiments of the present application can be applied to reduce an operating cost of redundancy backup of a link, and satisfy the millisecond level requirement of switching in industrial applications.

Description

Master-slave link switching, method and device for implementing link redundancy backup

This application claims the priority of the Chinese Patent Application entitled "A Master-Slave Link Switching, Link Redundancy Backup Method and Apparatus" submitted by the Chinese Patent Office on July 2, 2015, and the application number is 201510383324.2. The entire contents are incorporated herein by reference.

Technical field

The present application relates to the field of industrial Ethernet technologies, and in particular, to a method for switching between active and standby links, and a method and device for implementing link redundancy backup.

Background technique

In the existing DRP (Distributed Redundancy Protocol) ring network, each switching device that constitutes a DRP ring network is in an equal position, and each switching device maintains the network state in a fixed allocated time slice and sends The network maintenance message, the other switching device fills in the network status of the current ring port in the maintenance message, and forwards the network maintenance message. After the next time slice arrives, the switching device corresponding to the time slice in the DRP ring network To maintain the network.

In practical applications, the switching equipment can be located in an industrial Ethernet site, such as a substation, and two switching devices can be deployed in one industrial Ethernet site, and the switching devices located nationwide form a DRP ring network. Based on the needs of the user, different terminals located in the industrial Ethernet site need to be connected to implement data transmission in the DRP ring network. In order to ensure data transmission, each terminal connected to the network topology formed in the DRP ring network needs to form a redundant backup of the link.

In the prior art, when implementing redundancy backup, one method is to connect two switching devices in the DRP ring network in the same industrial Ethernet site through two links by using two network card terminals, and the dual network card terminals simultaneously The two switching devices send data packets, and the two switching devices negotiate, and one of the switching devices forwards the data packets. Once a link between the dual NIC terminal and the switching device fails, the switch can be used. The other link transmits data packets to implement redundant backup of the link.

Another method is to use a terminal that supports the Rapid Spanning Tree Protocol (RSTP). The terminal and the switching device in the DRP ring network generate a network topology based on the RSTP protocol, and implement redundancy backup of the link based on the RSTP protocol. .

The dual NIC terminals and RSTP terminals used in the existing two methods have higher costs, which increases the cost of redundant backup of the link, and the low-cost common hub HUB port terminal cannot be used in either method. use. In addition, when the link is faulty, the time for re-generating the network topology of the RSTP terminal will be limited by the number of switching devices included in the DRP ring network. When there are many switching devices included in the DRP ring network, each switching device After the network state maintenance is completed in the allocated time slice, the redundant backup of the link can be realized, and the redundancy backup time will reach the second level, which cannot meet the millisecond switching requirement in industrial applications.

Summary of the invention

To solve the above problem, the embodiment of the present application discloses a method for switching between active and standby links, and a method and device for implementing link redundancy backup. The technical solutions are as follows:

A method for implementing a link redundancy backup is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the second switching device All of the switching devices in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, and through the second link The second switching device is connected, the first link is in a disconnected state, the second link is in a connected state, and the first link and the second link form a backup group; Methods include:

Monitoring a link state of a DRP ring network link that is connected to the second switching device;

When it is detected that the DRP ring network link that is connected to the second switching device is faulty, and the length of the entire DRP ring network is in a fault state reaches a preset threshold, according to the record in the local configuration information table for each backup group The port number of the port that is itself assigned to the corresponding link, and finds each port that is in the blocked state;

Select a port from the discovered port, set it to the open state, and connect the first link connected to the port to connect the first link and the first link in the same backup group. The second link is switched to the link in the DRP ring network.

In a specific implementation manner of the present application, the selecting one port from the discovered ports and setting it to an open state includes:

According to the priority of each terminal and the port assigned to the link corresponding to each terminal, check The port identified as the link corresponding to the terminal with the highest priority among the found ports, and the identified port is set to the open state.

The backup groups corresponding to the discovered ports are sorted in the order of the preset IDs, and the ports corresponding to the first backup group are set to the open state.

An active/standby link switching method is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, where the first switching device and the second switching device are both a switching device in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, and through the second link The second switching device is connected, and the first link and the second link form a backup group, and the second link that is currently in a connected state in the first link and the second link The primary link is the primary link, and the first link that is currently in the disconnected state is the backup link. The method includes:

Receiving a fault communication message, where the fault communication message includes the identification information of the backup group where the second link that is faulty is located;

When it is determined that it is the switching device corresponding to the backup group where the second link that is faulty is located, the corresponding port number of the port allocated for the corresponding link for each backup group itself is searched according to the port number recorded in the local configuration information table. Port

Set the discovered port to the open state, so that the first link connected to the port is connected.

In an embodiment of the present application, the identifier information of the backup group includes: identifier information of an industrial Ethernet station where the backup group is located, and identifier information of a group where the backup group is located in an industrial Ethernet site; or The identification information of the industrial Ethernet site where the backup group is located, the identification information of the group where the backup group is located in the industrial Ethernet site, and the identification information of the switching device in the group; or the identifier of the terminal corresponding to the backup group information.

A link redundancy backup device is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the second switching device All are switching devices in the same distributed redundancy protocol DRP ring network; a terminal in the website, the terminal is connected to the first switching device by using a first link, and is connected to the second switching device by using a second link, where the first link is in a disconnected state. The second link is in a connected state, and the first link and the second link form a backup group; the device includes:

a link state monitoring module, configured to monitor a link state of a DRP ring network link that is connected to the second switching device;

a second port search module, configured to: when it is detected that the DRP ring link connected to the second switching device is faulty, and the duration of the entire DRP ring network is in a fault state reaches a preset threshold, according to the local configuration information table Find the port number of the port assigned to the corresponding link for each backup group itself, and find each port that is in the blocked state;

a second port opening module, configured to select a port from the discovered ports, set it to an open state, and connect the first link connected to the port to connect the first link and the first The second link of a link in the same backup group is switched to the link in the DRP ring network.

In a specific implementation manner of the application, the second port opening module is specifically configured to:

According to the priority of each terminal and the port assigned to the link corresponding to each terminal, the port assigned to the link corresponding to the terminal with the highest priority is identified from the found port, and the identified port is set to be opened. status.

An active/standby link switching device is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, where the first switching device and the second switching device are both a switching device in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, and through the second link The second switching device is connected, and the first link and the second link form a backup group, and the second link that is currently in a connected state in the first link and the second link The primary link is the primary link, and the first link that is currently in the disconnected state is the backup link; the device includes:

The fault communication message receiving module is configured to receive the fault communication message, where the fault communication message includes the identification information of the backup group where the second link that is faulty is located;

The first port searching module is configured to allocate, according to the local configuration information table, the corresponding link for each backup group according to the switching device corresponding to the backup group where the second link that is faulty is located. Port number of the port, find the corresponding port;

The first port open module is configured to set the found port to an open state, so that the first link connected to the port is in a connected state.

With the technical solution provided by the embodiment of the present application, after receiving the fault communication message, the first switching device can determine whether it is the backup group where the faulty link is located, according to the identifier information of the backup group in the fault communication message. The switching device determines whether the identification information of the backup group is recorded in the local configuration information. If yes, the first switching device can find the port that is allocated to the corresponding link of the same backup group as the faulty link. And setting the port to an open state, so that the link connected to the port is in a connected state, or the first switching device detects that the DRP ring link connected to the second switching device is faulty, and When the duration of the faulty state of the entire DRP ring network reaches the preset threshold, you can find the blocked port that is assigned to the corresponding link of each backup group, and select a port from the discovered ports to set it. In the open state, the link connected to the port can be connected, thereby implementing redundant backup of the link. In the embodiment of the present application, the terminal is not limited. The common HUB port terminal can also implement redundancy backup of the link, which reduces the running cost of the redundant backup of the link. In addition, the first switching device can set the corresponding port to the open state as long as it receives the fault communication message or meets the port open condition, and does not need to reconstruct the entire network topology structure. Therefore, the process requires a short duration and can meet the industrial requirement. The millisecond level of switching requirements in the application.

In order to achieve the above object, an embodiment of the present application further provides a storage medium, where the storage medium is used to store an application, and the application is configured to execute one of the applications described in the present application at runtime. A method for implementing link redundancy backup. The method for implementing link redundancy backup described in the present application includes:

In order to achieve the above object, an embodiment of the present application further provides an application, where the application is used to perform a link redundancy backup method described in the present application at runtime. The method for implementing link redundancy backup described in the present application includes:

In order to achieve the above object, the embodiment of the present application further provides a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the second device. The switching devices are all switching devices in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, through the second chain The second link is connected to the second switching device, the first link is in a disconnected state, the second link is in a connected state, and the first link and the second link form a backup group;

The first switching device includes:

a processor, a memory, a communication interface, and a bus;

The processor, the memory, and the communication interface are connected by the bus and complete communication with each other;

The memory stores executable program code;

The processor runs a program corresponding to the executable program code by reading executable program code stored in the memory for:

In order to achieve the above object, an embodiment of the present application further provides a storage medium, where the storage medium is used to store an application, and the application is configured to perform one type of active/standby link switching described in the present application at runtime. method. The method for switching between the active and standby links in the present application includes:

In order to achieve the above object, an embodiment of the present application further provides an application, where The program is used to perform a primary and backup link switching method described in the present application at runtime. The method for switching between the active and standby links in the present application includes:

In order to achieve the above object, the embodiment of the present application further provides a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the second device. The switching devices are all switching devices in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, through the second chain The road is connected to the second switching device, and the first link and the second link form a backup group, and the first link and the second link are currently in a connected state. The second link is the primary link, and the first link that is currently in the disconnected state is the backup link.

The first switching device includes:

a processor, a memory, a communication interface, and a bus;

The memory stores executable program code;

When it is determined that it is the switching device corresponding to the backup group where the second link that is faulty is located, the end allocated for the corresponding link for each backup group itself is recorded according to the local configuration information table. Port number of the port, find the corresponding port;

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the drawings without any creative work for those skilled in the art.

1 is a schematic diagram of a DRP ring network in an embodiment of the present application;

2 is a flowchart of an implementation of a method for switching between a primary and backup link in an embodiment of the present application;

FIG. 3 is a flowchart of an implementation of a method for implementing link redundancy backup according to an embodiment of the present application;

4 is a schematic structural diagram of an active/standby link switching apparatus according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a device for implementing link redundancy backup in the embodiment of the present application.

detailed description

An active/standby link switching method provided by the embodiment of the present application is described. The method may include the following steps:

The execution body of the above steps is the first switching device. The first switching device and the second switching device are deployed in the same industrial Ethernet site, such as a substation, and the first switching device and the second switching device are switching devices in the same distributed redundancy protocol DRP ring network; In the Industrial Ethernet site Each terminal, the terminal is connected to the first switching device through the first link, and is connected to the second switching device through the second link, and the first link and the second link form a backup group, in the first chain. In the second link, the second link that is currently in the connected state is the primary link, and the first link that is currently in the disconnected state is the backup link. The embodiment of the present application is described by taking an industrial Ethernet station as a substation as an example.

Referring to Figure 1, in a nationwide DRP ring network, there are four switching devices: SW1, SW2, SW3, and SW4. Among them, SW2 and SW3 are deployed in the first substation, and SW1 and SW4 are deployed in the second substation. In the first substation, there are three terminals having a link connection relationship with SW2 and SW3, and the terminal H1, the terminal H2, and the terminal H3. For each terminal, the link that is currently connected is the primary link, and the link that is currently disconnected is the backup link. That is to say, the first switching device in the embodiment of the present application may be different for different terminals. For example, for the terminal H1, if the link connected to the SW2 is in the connected state, and the link connected to the SW3 is in the disconnected state, the SW2 is the second switching device, and the SW3 is the first switching device; It is said that if the link connected to SW2 is in the disconnected state and the link connected to SW3 is in the open state, SW2 is the first switching device, and SW3 is the second switching device. The two links corresponding to the terminal H1 form a first backup group, the two links corresponding to the terminal H2 form a second backup group, and the two links corresponding to the terminal H3 form a third backup group. It should be noted that the number of terminals in the same substation can be adjusted according to the actual situation, and the embodiment of the present application does not limit this.

When the link between the switching device and the terminal fails, the corresponding switching device sends a fault communication packet to the other switching device in the DRP ring network. The fault communication packet contains the identifier of the backup group where the faulty link is located. information. After receiving the fault communication message, the first switching device can determine whether it is the switching device corresponding to the backup group where the second link is faulty according to the identifier information of the backup group in the fault communication message. If yes, Then, according to the port number of the port allocated for the corresponding link for each backup group itself recorded in the local configuration information table, the port allocated to the link in the same backup group as the failed second link can be found. And setting the port to the open state, so that the first link connected to the port is in a connected state, and the switching between the active and standby links is implemented.

With the technical solution provided by the embodiment of the present application, after receiving the fault communication message, the first switching device can determine whether it is the backup group where the faulty link is located, according to the identifier information of the backup group in the fault communication message. The switching device determines whether the identification information of the backup group is recorded in the local configuration information. If yes, the first switching device can find the port that is allocated to the corresponding link of the same backup group as the faulty link. And set the port to open. In this way, the link connected to the port can be connected, thereby implementing redundant backup of the link. In the embodiment of the present application, the terminal is not limited. The common HUB port terminal can also implement redundancy backup of the link, which reduces the running cost of the redundant backup of the link. In addition, the first switching device can set the corresponding port to the open state as long as it receives the faulty communication packet, and does not need to reconstruct the entire network topology structure. Therefore, the process requires a short duration and can meet milliseconds in industrial applications. Switching requirements.

The technical solutions in the embodiments of the present application are clearly and completely described in the following, in which the technical solutions in the embodiments of the present application are clearly and completely described. The embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

The embodiment of the present application provides a method for switching between the active and standby links, where the method is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the second device. The switching devices are all switching devices in the same DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, and is connected to the second switching device through the second link. And the first link and the second link form a backup group. In the first link and the second link, the second link that is currently in the connected state is the primary link, and the first link is currently in the disconnected state. The link is a backup link; as shown in FIG. 2, which is an implementation flowchart of the method, the method may include the following steps:

S110: Receive a fault communication message.

The fault communication message includes the identifier information of the backup group where the second link that is faulty is located. In practical applications, each terminal in the industrial Ethernet site is connected to two switching devices in the industrial Ethernet site in the DRP ring network through a link, one of which is the main link in the connected state, and the other chain The road is a backup link in the disconnected state, and each terminal sends a data packet through its primary link.

When the link between the switching device and the terminal in the DRP ring network fails, the corresponding switching device can send fault communication packets to other switching devices in the DRP ring network through broadcast or multicast. The fault communication packet can contain the identification information of the backup group where the faulty link is located. In a DRP ring network, a backup group can be uniquely identified by the identification information of the backup group. It should be noted that the faulty link is the first link that fails.

In an embodiment of the present application, the identifier information of the backup group may include: identifier information of an industrial Ethernet station where the backup group is located, and identifier information of a group where the backup group is located in an industrial Ethernet site; Or the identification information of the industrial Ethernet site where the backup group is located, the identification information of the group where the backup group is located in the industrial Ethernet site, and the identification information of the switching device in the group; or the terminal corresponding to the backup group Identification information.

It should be noted that the identification information of the backup group is not limited to the above-mentioned information, and a unique coding information may be used to determine a unique identification information for each backup group in the DRP ring network. Make restrictions.

After receiving the fault communication message, the first switching device can resolve the identification information of the backup group where the faulty link is located from the fault communication message, and record the corresponding backup group in the local configuration information table of the first switching device. The identification information is obtained by querying the configuration information table, and the first switching device can determine whether it is the switching device corresponding to the backup group where the faulty link is located. If the information about the VRRP group with the faulty link is recorded in the configuration information table, the first switching device is the switching device corresponding to the VRRP group where the faulty link resides.

For ease of understanding, an example is given. For example, SW2 in FIG. 1 detects that the main link connecting SW2 and terminal H1 is faulty, and SW2 can send a fault communication message to other switching devices in the DRP ring network, and the fault communication message includes SW2 and terminal H1. For the terminal H1, the SW3 is the first switching device in the embodiment of the present application, and the SW3 receives the faulty communication packet and parses the identifier of the VRRP group. The backup group where the faulty link is located is the first backup group. If the information about the first backup group is recorded in the local configuration information table, the SW3 can determine that it is the first backup group. Switching equipment.

When the first switching device determines that it is the switching device corresponding to the backup group where the second link that is faulty is located, the operation of step S120 may be continued.

S120: Search for the corresponding port according to the port number of the port allocated for the corresponding link for each backup group itself recorded in the local configuration information table.

In an industrial Ethernet site, such as a substation, if a terminal in the Industrial Ethernet site is to be connected to a switching device in the Industrial Ethernet site, a corresponding switching device is required to assign a port to the corresponding link of the corresponding terminal. . For example, SW2 in Figure 1 can assign port 1 to terminal H1. Terminal H2 allocates port 2, and assigns port 3 to terminal H3. Similarly, SW3 can assign port 1 to terminal H1, port 2 to terminal H2, and port 3 to terminal H3. Of course, specific port assignment rules can be set and adjusted according to specific conditions.

After the terminal in the industrial Ethernet site performs the link configuration with the switching device, the configuration information table can be saved in the corresponding switching device. For example, the configuration information table saved in SW3 can be as shown in Table 1.

备份组的标识信息Backup group identification information	端口号The port number
第一备份组的标识信息Identification information of the first backup group	11
第二备份组的标识信息Identification information of the second backup group	22
第三备份组的标识信息Identification information of the third backup group	33

Table 1

It should be noted that Table 1 only shows the identification information and port number of the backup group in the configuration information table. In the actual application, the configuration information table can also store other more information, such as the identification information of the second switching device. The port number assigned by the second switching device to the corresponding link of each terminal.

The first switching device searches for a port assigned to the link in the same backup group as the failed link according to the port number of the port allocated for the corresponding link for each backup group itself recorded in the local configuration information table. For example, the faulty link is the link between the SW2 and the terminal H1, and the fault communication message received by the SW3 includes the identifier information of the first backup group, and the SW3 queries the local configuration information table to identify the identifier information of the first backup group. The corresponding port number is 1. This port is the port that SW3 is assigned to the link in the same backup group as the faulty link.

S130: Set the found port to an open state, so that the first link connected to the port is in a connected state.

After the first switching device finds the port assigned to the link in the same backup group as the faulty link, the port may be set to an open state, so that the link connected to the port is in a connected state. To switch between the active and standby links. For example, the faulty link is the link between the SW2 and the terminal H1, the SW3 is the switching device corresponding to the backup group where the faulty link is located, and the SW3 sets the port of the link assigned to the terminal H1 to the open state, which can enable The link between SW3 and terminal H1 is connected. In the pass state, the data packet sent by the terminal H1 is transmitted through the link between the SW3 and the terminal H1.

With the technical solution provided by the embodiment of the present application, after receiving the fault communication message, the first switching device can determine whether it is the backup group where the faulty link is located, according to the identifier information of the backup group in the fault communication message. The switching device determines whether the identification information of the backup group is recorded in the local configuration information. If yes, the first switching device can find the port allocated to the corresponding link of the same backup group as the faulty link. The port is set to the open state, so that the link connected to the port can be connected, thereby implementing redundant backup of the link. In the embodiment of the present application, the terminal is not limited. The common HUB port terminal can also implement redundancy backup of the link, which reduces the running cost of the redundant backup of the link. In addition, the first switching device can set the corresponding port to the open state as long as it receives the faulty communication packet, and does not need to reconstruct the entire network topology structure. Therefore, the process requires a short duration and can meet milliseconds in industrial applications. Switching requirements.

In a DRP ring network, not only the link between the switching device and the terminal may be faulty, but also the DRP ring link between the switching devices may be faulty. If the switching device supports the RSTP protocol in the DRP ring network, when a fault occurs on the link between two switching devices on the DRP ring network, you can enable the pre-configured port in the blocked state. Redundant backup of the link. However, if there are at least two DRP ring network links, if the redundancy backup of the link is to be implemented, the link redundancy backup method provided by the embodiment of the present application may be applied.

The method is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, and the first switching device and the second switching device are both the same distributed redundancy protocol DRP ring network. a switching device in the medium; the terminal is connected to the first switching device by using the first link, and is connected to the second switching device by using the second link, where the first link is In the disconnected state, the second link is in a connected state, and the first link and the second link form a backup group.

As shown in FIG. 3, an implementation flowchart of a method for implementing link redundancy backup provided by an embodiment of the present application may include the following steps:

S210: Monitor a link state of a DRP ring network link that is connected to the second switching device.

To ensure normal communication of the entire DRP ring network, the first switching device can monitor the link state of the DRP ring network link that is connected to the second switching device in real time. If the DRP ring link is detected, The operation of step S220 can be continued.

S220: When it is detected that the DRP ring link connected to the second switching device is faulty, and the duration of the entire DRP ring network is in a fault state reaches a preset threshold, according to the record in the local configuration information table for each The port number of the port that the backup group itself allocates for the corresponding link, and finds each port that is in the blocked state.

In the actual application, if the switching device supports the RSTP protocol in the DRP ring network, when the link between two switching devices on the DRP ring network fails, the pre-configured port in the blocked state is opened. The method of performing the redundancy backup of the link and opening the pre-configured port in the blocked state belongs to the prior art, and is not repeatedly described in the embodiment of the present application.

When a DRP ring network link on the DRP ring network fails, the pre-configured port is blocked and the link is redundant. The required time is shorter. You can set the time according to the length of time required in the actual application. A threshold.

When the first switching device detects that the DRP ring link is faulty and has not reached the preset threshold, the DRP ring network is in a normal communication state, indicating that the previously blocked port in the DRP ring network has been opened. , solved the link failure problem.

Conversely, when the first switching device detects that the DRP ring link connected to the second switching device is faulty, and the duration of the fault condition of the entire DRP ring network reaches a preset threshold, the DRP ring network may be indicated. The link is not the first faulty link in the DRP ring network. Before the DRP ring network link fails, the link between other switching devices in the DRP ring network has failed, and the pre-configuration is performed. The operation of a blocked port. At this time, the first switching device can find each port in the blocked state according to the port number of the port allocated for the corresponding link for each backup group itself recorded in the local configuration information table.

For example, SW3 can obtain the information of port 1, port 2, and port 3 according to the port number recorded in the local configuration information table for each backup group itself, and then determine the status of each port. Each port in the blocked state is found, for example, the ports found are port 1 and port 2.

S230: Select a port from the discovered ports, set it to an open state, and connect the first link connected to the port to connect the first link and the first link. The second link in the backup group switches to the link in the DRP ring network.

After the operation of step S220 is performed, the first switching device finds each port in the blocked state, and selects one port from the found ports. Specifically, the first switching device may randomly select or select according to a preset requirement, and then select The outgoing port is set to an open state, so that the link connected to the port is in a connected state. In this way, the two links in the backup group corresponding to the port are in a connected state, which is equivalent to switching the first link and the second link in the same backup group as the first link to the DRP ring. The link in the network forms a switching of the DRP ring network, where the first link and the second link can transmit data packets as part of the link of the DRP ring network.

After the DRP ring network is switched, the election of the primary switching device can be performed on the DRP ring network. The elected primary switching device re-configures the port status of the corresponding port. This process is prior art. This will not be repeated here.

In a specific implementation manner of the present application, step S230 may specifically include the following steps:

In actual applications, priority can be set for each terminal connected to the DRP ring network according to the actual situation. The priorities of different terminals are different. For example, a high priority can be set for a terminal with a small load capacity. After obtaining the priority of each terminal and the port allocated by each terminal for each terminal, the first switching device can identify the port allocated by the link corresponding to the terminal with the highest priority from the found port. And set the identified port to the open state.

In another specific implementation manner of the present application, step S230 may specifically include the following steps:

In a DRP ring network, each backup group has a unique identifier. The backup groups corresponding to the discovered ports can be sorted according to the order of the identifiers from large to small or from small to large, and the first backup group is corresponding. The port is set to open.

In the DRP ring network, for each Industrial Ethernet site, each of the Industrial Ethernet sites Each terminal can be connected to two switching devices in the industrial Ethernet site. When at least two DRP ring links in the DRP ring network fail, the first switching device in different industrial Ethernet sites is The method provided in this embodiment of the present application can be used to set the port of the corresponding link allocated to the corresponding terminal to an open state to implement redundancy backup of the link.

Applying the technical solution provided by the embodiment of the present application, when the first switching device detects that the DRP ring network link connected to the second switching device is faulty, and the duration of the DRP ring network in the fault state reaches a preset threshold, Find the blocked port that is assigned to the corresponding link of each backup group, and select one of the discovered ports to set it to the open state, so that the link connected to the port can be Connected state, thus achieving redundant backup of the link. In the embodiment of the present application, the terminal is not limited. The common HUB port terminal can also implement redundancy backup of the link, which reduces the running cost of the redundant backup of the link. In addition, as long as the port switching condition is met, the first switching device can set the corresponding port to the open state without reconfiguring the entire network topology structure, so the process requires a short duration and can meet millisecond switching in industrial applications. Claim.

Corresponding to the method embodiment shown in FIG. 2, the embodiment of the present application further provides an active/standby link switching device, where the device is applied to a first switching device, and the first switching device and the second switching device are deployed in the same industry. In the Ethernet site, the first switching device and the second switching device are switching devices in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal passes the a link is connected to the first switching device, connected to the second switching device by using a second link, and the first link and the second link form a backup group, where the first link In the link and the second link, the second link that is currently in the connected state is the primary link, and the first link that is currently in the disconnected state is the backup link; as shown in FIG. 4, the device may include The following modules:

The fault communication message receiving module 310 is configured to receive the fault communication message, where the fault communication message includes the identifier information of the backup group where the second link that is faulty is located;

The identification information of the backup group may include: identifier information of an industrial Ethernet site where the backup group is located, and identifier information of a group where the backup group is located in an industrial Ethernet site; or an industrial Ethernet site where the backup group is located The identification information of the group in which the backup group is located in the industrial Ethernet site and the identification information of the switching device in the group; or the identification information of the terminal corresponding to the backup group.

The first port searching module 320 is configured to: when determining that the switching device corresponding to the backup group where the second link is faulty, the corresponding link is recorded for each backup group according to the local configuration information table. The port number of the assigned port to find the corresponding port;

The first port opening module 330 is configured to set the found port to an open state, so that the first link connected to the port is in a connected state.

Applying the device provided by the embodiment of the present application, after receiving the fault communication message, the first switching device can determine whether the backup group corresponding to the fault link is exchanged according to the identifier information of the backup group in the fault communication message. The device, that is, whether the identification information of the backup group is recorded in the local configuration information, and if yes, the first switching device can find the port allocated to the corresponding link of the same backup group as the faulty link, and The port is set to the open state, so that the link connected to the port can be connected, thereby implementing redundant backup of the link. In the embodiment of the present application, the terminal is not limited. The common HUB port terminal can also implement redundancy backup of the link, which reduces the running cost of the redundant backup of the link. In addition, the first switching device can set the corresponding port to the open state as long as it receives the faulty communication packet, and does not need to reconstruct the entire network topology structure. Therefore, the process requires a short duration and can meet milliseconds in industrial applications. Switching requirements.

Corresponding to the method embodiment shown in FIG. 3, the embodiment of the present application further provides a link redundancy backup device, where the device is applied to a first switching device, and the first switching device is deployed in the same manner as the second switching device. In an industrial Ethernet site, the first switching device and the second switching device are switching devices in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal passes The first link is connected to the first switching device, and is connected to the second switching device by using a second link, where the first link is in an open state, and the second link is in a connected state, and The first link and the second link form a backup group; as shown in FIG. 5, the device may include the following modules:

The link state monitoring module 410 is configured to monitor a link state of a DRP ring network link that is connected to the second switching device.

The second port searching module 420 is configured to: when it is detected that the DRP ring link connected to the second switching device is faulty, and the duration of the entire DRP ring network is in a fault state reaches a preset threshold, according to the local The port number of the port assigned to the corresponding link for each backup group itself recorded in the configuration information table, and each port in the blocked state is searched;

The second port opening module 430 is configured to select a port from the discovered ports, set it to an open state, and enable the first link connected to the port to be in a connected state, to connect the first link and the The second link of the first link in the same backup group is switched to the link in the DRP ring network.

In a specific implementation manner of the present application, the second port opening module 430 may be specifically configured to: according to the priority of each terminal and the port allocated by itself for the link corresponding to each terminal, from the found The port identified in the port as the link corresponding to the terminal with the highest priority, and the identified port is set to the open state.

In a specific implementation manner of the present application, the second port opening module 430 may be specifically configured to: sort the backup groups corresponding to the searched ports according to a preset identifier sequence, and correspond to the first backup group. The port is set to open.

When the device provided by the embodiment of the present application detects that the DRP ring network link that is connected to the second switching device is faulty, and the length of the DRP ring network is in a fault state reaches a preset threshold, the device can search for a preset threshold. Connect to the blocked port that is assigned to the corresponding link of each backup group, and select one of the discovered ports to set it to the open state. In this way, the link connected to the port can be connected. State, thus enabling redundant backup of the link. In the embodiment of the present application, the terminal is not limited. The common HUB port terminal can also implement redundancy backup of the link, which reduces the running cost of the redundant backup of the link. In addition, as long as the port switching condition is met, the first switching device can set the corresponding port to the open state without reconfiguring the entire network topology structure, so the process requires a short duration and can meet millisecond switching in industrial applications. Claim.

In order to achieve the above object, an embodiment of the present application further provides a storage medium, where the storage medium is used to store an application, and the application is used to perform link redundancy described in the present application at runtime. Backup method. The method for implementing link redundancy backup described in the present application includes:

The first switching device includes:

a processor, a memory, a communication interface, and a bus;

The memory stores executable program code;

In order to achieve the above objective, the embodiment of the present application further provides an application, where the application is used to perform a primary and backup link switching method described in the present application at runtime. The method for switching between the active and standby links in the present application includes:

Set the discovered port to the open state, so that the first link connected to the port is connected. status.

The first switching device includes:

a processor, a memory, a communication interface, and a bus;

The memory stores executable program code;

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variants thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that includes a plurality of elements includes not only those elements but also Other elements that are listed, or include elements inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The various embodiments in the present specification are described in a related manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

One of ordinary skill in the art can understand that all or part of the steps in implementing the above method embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, which is referred to herein. Storage media such as ROM/RAM, disk, CD, etc.

The above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are included in the scope of the present application.

Claims

A method for implementing a link redundancy backup, which is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the The second switching device is a switching device in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device by using the first link, The second link is connected to the second switching device, the first link is in a disconnected state, the second link is in a connected state, and the first link and the second link constitute a backup Group; the method includes:

Monitoring a link state of a DRP ring network link that is connected to the second switching device;

When it is detected that the DRP ring network link that is connected to the second switching device is faulty, and the length of the entire DRP ring network is in a fault state reaches a preset threshold, according to the record in the local configuration information table for each backup group The port number of the port that is itself assigned to the corresponding link, and finds each port that is in the blocked state;

Select a port from the discovered port, set it to the open state, and connect the first link connected to the port to connect the first link and the first link in the same backup group. The second link is switched to the link in the DRP ring network.
The method according to claim 1, wherein said selecting a port from the found ports and setting it to an open state comprises:

According to the priority of each terminal and the port assigned to the link corresponding to each terminal, the port assigned to the link corresponding to the terminal with the highest priority is identified from the found port, and the identified port is set to be opened. status.
The method according to claim 1, wherein said selecting a port from the found ports and setting it to an open state comprises:

The backup groups corresponding to the discovered ports are sorted in the order of the preset IDs, and the ports corresponding to the first backup group are set to the open state.
An active/standby link switching method is applied to a first switching device, where the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the first The second switching device is a switching device in the same distributed redundancy protocol DRP ring network; Each terminal in the industrial Ethernet site, the terminal is connected to the first switching device by using a first link, and the second switching device is connected by a second link, and the first link is The second link constitutes a backup group. In the first link and the second link, the second link that is currently in the connected state is the primary link, and the first link that is currently in the disconnected state. As a backup link; the method includes:

Receiving a fault communication message, where the fault communication message includes the identification information of the backup group where the second link that is faulty is located;

When it is determined that it is the switching device corresponding to the backup group where the second link that is faulty is located, the corresponding port number of the port allocated for the corresponding link for each backup group itself is searched according to the port number recorded in the local configuration information table. Port

Set the discovered port to the open state, so that the first link connected to the port is connected.
The method according to claim 4, wherein the identification information of the backup group comprises: identification information of an industrial Ethernet site where the backup group is located, and identification information of a group where the backup group is located in an industrial Ethernet site. Or the identification information of the industrial Ethernet site where the backup group is located, the identification information of the group in which the backup group is located in the industrial Ethernet site, and the identification information of the switching device in the group; or the terminal corresponding to the backup group Identification information.
A device for implementing a link redundancy backup, characterized in that it is applied to a first switching device, the first switching device and the second switching device are deployed in the same industrial Ethernet site, the first switching device and the The second switching device is a switching device in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device by using the first link, The second link is connected to the second switching device, the first link is in a disconnected state, the second link is in a connected state, and the first link and the second link constitute a backup Group; the device comprises:

a link state monitoring module, configured to monitor a link state of a DRP ring network link that is connected to the second switching device;

a second port search module, configured to: when it is detected that the DRP ring link connected to the second switching device is faulty, and the duration of the entire DRP ring network is in a fault state reaches a preset threshold, The port number of the port assigned to the corresponding link for each backup group itself recorded in the local configuration information table, and each port in the blocked state is searched;

a second port opening module, configured to select a port from the discovered ports, set it to an open state, and connect the first link connected to the port to connect the first link and the first The second link of a link in the same backup group is switched to the link in the DRP ring network.
The device according to claim 6, wherein the second port opening module is specifically configured to:

According to the priority of each terminal and the port assigned to the link corresponding to each terminal, the port assigned to the link corresponding to the terminal with the highest priority is identified from the found port, and the identified port is set to be opened. status.
The device according to claim 6, wherein the second port opening module is specifically configured to:

The backup groups corresponding to the discovered ports are sorted in the order of the preset IDs, and the ports corresponding to the first backup group are set to the open state.
An active/standby link switching device is configured to be applied to a first switching device, where the first switching device and the second switching device are deployed in a same industrial Ethernet site, the first switching device and the first The second switching device is a switching device in the same distributed redundancy protocol DRP ring network; for each terminal in the industrial Ethernet site, the terminal is connected to the first switching device through the first link, and passes through the second The link is connected to the second switching device, and the first link and the second link form a backup group, and the first link and the second link are currently in a connected state. The second link is the primary link, and the first link that is currently in the disconnected state is the backup link; the device includes:

The fault communication message receiving module is configured to receive the fault communication message, where the fault communication message includes the identification information of the backup group where the second link that is faulty is located;

The first port searching module is configured to allocate, according to the local configuration information table, the corresponding link for each backup group according to the switching device corresponding to the backup group where the second link that is faulty is located. Port number of the port, find the corresponding port;

The first port open module is configured to set the found port to an open state, so that the first link connected to the port is in a connected state.
The device according to claim 9, wherein the identification information of the backup group comprises: identification information of an industrial Ethernet site where the backup group is located, and identification information of a group where the backup group is located in an industrial Ethernet site. Or the identification information of the industrial Ethernet site where the backup group is located, the identification information of the group in which the backup group is located in the industrial Ethernet site, and the identification information of the switching device in the group; or the terminal corresponding to the backup group Identification information.