WO2022199033A1

WO2022199033A1 - Network device, inter-board communication method, and storage medium

Info

Publication number: WO2022199033A1
Application number: PCT/CN2021/128587
Authority: WO
Inventors: 焦赵云
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-03-22
Filing date: 2021-11-04
Publication date: 2022-09-29
Also published as: CN115190003A

Abstract

The present embodiment relates to the field of communications, and in particular, to a network device, an inter-board communication method, and a storage medium. Boards included in the network device provided by the embodiments of the present disclosure comprise a primary main control board, a standby main control board, and at least one line card. The line card is provided with at least two line card ports used for inter-board communication, and the at least two line card ports are respectively connected to the primary main control board and the standby main control board, to form at least two communication links between the primary main control board and the line card. If any board detects that any communication link between the primary main control board and the line card is abnormal, another normal communication link is employed to enable the primary main control board to communicate with the line card. According to the present embodiment, when the connection between either the primary main control board or the standby main control board and the line card is interrupted, normal working of inter-board communication can still be ensured, thereby improving the stability and reliability of the inter-board communication.

Description

Network device, inter-board communication method and storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese patent application CN202110302471.8, which was filed on March 22, 2021, and is entitled "A kind of network device", the entire contents of which are incorporated into this application by reference.

technical field

The present disclosure relates to the field of communications, and in particular, to a network device, an inter-board communication method and a storage medium.

Background technique

At present, many network devices adopt the structure of chassis and board, such as high-end switches, high-end routers, OLTs, and DSLAMs. Boards are divided into active main control board, standby main control board and line card. The control link between the active main control board, the standby main control board and the line card is called the inter-board communication link. The connection method is that the switch chip on the active main control board is connected to the switch chip on the standby main control board and all the line cards, and the connection between the switch chip on the standby main control board and the line cards is during the main-standby switchover. Switch by switch.

However, the board-pluggable network device is to insert the board into the backplane, and there is a reliability problem due to the use of connectors for connection. For example, when the communication between a line card and the switch chip on the active main control board is interrupted, the communication between the main main control board and the line card can be restored only when the main control board is switched to the new main control board. When a line card cannot communicate with the switching chip on the new active main control board, it needs to be switched back, and there is a situation of repeated switching.

SUMMARY OF THE INVENTION

The present disclosure provides a network device, which can improve the stability of communication between boards and improve the efficiency of communication when both the main main control board and the standby main control board are disconnected from different line cards.

An embodiment of the present disclosure provides a network device, including a board card including: an active main control board, a standby main control board, and at least one line card; at least one communication port is used between the main main control board and the standby main control board Connection; at least two line card ports for inter-board communication are arranged on the line card, and at least two line card ports are respectively connected to the main main control board and the standby main control board, forming at least two main main control boards and lines The communication link between the cards; if any board detects that any communication link between the main main control board and the line card is abnormal, another normal communication link is used to enable the main main control board Communicate with the line card.

The embodiment of the present disclosure also provides an inter-board communication method applied to the above-mentioned network device, including: configuring at least two communication links formed between the main main control board and the line card; If any communication link between the main main control board and the line card is abnormal, another normal communication link is used to enable the main main control board to communicate with the line card.

Embodiments of the present disclosure further provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, implements the foregoing method steps.

Description of drawings

1 is a schematic diagram of a connection between boards in a network device in the prior art;

FIG. 2 is a schematic structural diagram of a network device according to the first embodiment of the present disclosure;

3 is a schematic structural diagram of a network device according to a second embodiment of the present disclosure;

4 is a schematic diagram of connections between components in a network device according to a second embodiment of the present disclosure;

5 is a schematic diagram of an interconnection port in a network device according to a second embodiment of the present disclosure;

6 is a schematic diagram of an aggregation group configured in a network device according to a second embodiment of the present disclosure;

7 is a schematic diagram of an aggregation group in another connection mode in a network device provided according to a second embodiment of the present disclosure;

8 is a schematic diagram of an active/standby mode configured in a network device according to a third embodiment of the present disclosure;

FIG. 9 is a flowchart of a method for inter-board communication in a network device provided in a fourth embodiment of the present disclosure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, each embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can appreciate that in the various embodiments of the present disclosure, many technical details are set forth for the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can be implemented. The following divisions of the various embodiments are for the convenience of description, and should not constitute any limitation on the specific implementation of the present disclosure, and the various embodiments may be combined with each other and referred to each other on the premise of not contradicting each other.

A structural block diagram of a related network device is shown in FIG. 1 , and a current network device includes an active main control board, a standby main control board and at least one line card. The control link between the active main control board, the standby main control board and the line card is called the inter-board communication link. Generally, the communication link between boards and the service link are independent. Commonly used communication links between boards are Ethernet or HDLC. Ethernet is the most commonly used communication method between boards. The connection method is that the switch chip on the main main control board is connected to the standby main control board and all line cards, and the switch chip on the standby main control board is connected to the main main control board at the same time. The control board is connected to all line cards, and the communication link of the line card port is switched through the switch on the line card. Figure 1 shows the connection status of the active main control board and the backup main control board under normal conditions. The connection shown in 1, the switch chip on the new active main control board is connected to the new standby main control board and all line cards. There is a defect in this overall switching method: if the board of the network device is inserted into the backplane in a plug-in manner, due to the use of connectors to connect the board and the backplane, there will be frequent plugging and unplugging between the board and some parts of the board. The problem of disconnection of the line card is that when the communication between the line card 1 and the switch chip on the active main control board is interrupted, the communication between the main main control board and the line card can be restored only when the active and standby switches are switched to the new main control board. For communication, if the line card 2 cannot communicate with the switching chip on the new active main control board, it needs to be switched back, and repeated switching occurs.

The first embodiment of the present disclosure relates to a network device. As shown in FIG. 2 , the network device includes an active main control board 10 , a standby main control board 20 and at least one line card 30 .

The main main control board 10 and the standby main control board 20 are connected through at least one communication port. The line card 30 is provided with at least two line card ports, and the at least two line card ports are respectively connected to the main main control board 10 and the standby main control board 20 to form communication between the at least two main main control boards and the line cards. link. If any board detects that any communication link between the main main control board and the line card is abnormal, another normal communication link is used to enable the main main control board to communicate with the line card.

By using the network device proposed in the present disclosure, at least two line card ports are set on the line card of the network device, and the two line card ports are respectively connected to the main main control board and the standby main control board, so that the network device at the same time There are at least two communication links between each line card and the main main control board. When any communication link between the line card and the main main control board is disconnected, another normal communication link can be used. Link, since there is no need to perform active/standby switchover between the active main control board and the standby main control board, the normal communication between the line card and the active main control board can be ensured, and the communication efficiency is improved; on the other hand, When the connection between the standby main board and other line cards is interrupted at the same time, it is not necessary to perform the active-standby switchover between the active main control board and the standby main control board to avoid repeated switching; at the same time, it will not affect other The communication between the normal line card and the main main control board or the standby main control board further improves the reliability of the communication between the boards.

The second embodiment of the present disclosure relates to a network device, the second embodiment is a detailed introduction to the first embodiment, and a structural block diagram of the network device is shown in FIG. 3 .

In one example, the main main control board includes a main main control board processor and a first forwarding chip connected to the main main control board processor. The standby main control board includes a standby main control board processor and a second forwarding chip connected to the standby main control board processor. A line card port is provided on the line card processor of the line card. The first forwarding chip is connected to any line card port to form a first communication link between the processor of the main main control board and the line card. The first forwarding chip and the second forwarding chip are connected through at least one communication port, and the second forwarding chip is connected with another line card port of the line card to form a second communication link between the first forwarding chip and the line card. The active main control board processor is configured to configure the first communication link and the second communication link to be in a load sharing mode, or configured to configure the first communication link and the second communication link to be in an active/standby mode.

For example, in this example, the network device may be a plug-in network device, the board is connected to the backplane in a plug-in manner, and the backplane is provided with a metal connector connected to the line card. The outside of the network equipment is a frame structure, which is used to protect the board and facilitate the setting of the backplane. In this example, the boards of the network device include an active main control board, a standby main control board, and line cards, and there may be multiple line cards, for example, two line cards, three or more line cards, and so on. Each line card is provided with at least two line card ports. The line card includes a line card processor and a line card forwarding chip. The line card ports can be arranged on the line card processor or on the line card forwarding chip. If there are more than two standby main control boards, there can be more than three line card ports. In this example, the two line card ports built into the line card processor are used as an example.

As shown in Figure 4, there are n line cards, n is an integer greater than 2, the line card forwarding chip is not shown in the line card, and there are two communications between the main main control board and the line card processor of each line card The links are respectively a first communication link and a second communication link. The port on the first forwarding chip is directly connected to any line card port on the line card processor to form a first communication link. The communication port of the first forwarding chip is connected to the communication port of the second forwarding chip, and the port of the second forwarding chip is connected to another line card port on the line card processor to form a second communication link. As shown in FIG. 4 , the first communication link between the line card 1 and the first forwarding chip is marked as a solid line a1, and the second communication link is marked as a2.

The number of communication links between the first forwarding chip and the second forwarding chip may be one or two, that is, port a of the first forwarding chip is connected to port a of the second forwarding chip, and the first forwarding chip is connected to port a of the second forwarding chip. The b port of the second forwarding chip is connected to the b port of the second forwarding chip to form two communication links between the first forwarding chip and the second forwarding chip, as shown in FIG. 5 .

In one example, the active main control board processor is used to configure the communication port in the first forwarding chip for connecting to the second forwarding chip as the first stack port; the standby main control board processor is used to configure the communication port used in the second forwarding chip The communication port connected to the first forwarding chip is the second stack port. The main main control board processor and the standby main control board processor are respectively used for: configuring the port used for connecting the line card in the first forwarding chip and the port used for connecting the line card on the second forwarding chip as the first aggregation group . The line card is used for configuring the line card port connected with the first forwarding chip and the line card port connected with the second forwarding chip to the second aggregation group of the board. The first aggregation group is connected with the second aggregation group to form an aggregation link, so that the first communication link and the second communication link are in a load sharing mode.

The following describes the process of configuring the first communication link and the second communication link in the load sharing mode in detail with reference to FIG. 6 .

As shown in FIG. 6 , the communication port a of the first forwarding chip is connected to the communication port a of the second forwarding chip. At the same time, the communication port a on the first forwarding chip is configured as the first stack port, and the communication port a on the second forwarding chip is The communication port a is configured as the second stack port. The port p1 in the first forwarding chip is connected to the line card port 1 of the line card 1 , and the port p1 ′ of the second forwarding chip is connected to the line card port 2 of the line card 1 . The active main control board processor is used to configure the port p1 on the active main control board processor and the port p1' on the standby main control board processor as the first aggregation group; the line card processor is used for connecting with the first forwarding chip The connected line card port 1 and the line card port 2 connected to the second forwarding chip are configured as a second aggregation group, wherein the first aggregation group and the second aggregation group are connected to form an aggregation chain between the first forwarding chip and the line card path, so that the first communication link and the second communication link are configured in a load sharing mode. In FIG. 6 , a schematic diagram of an aggregated link between the line card 1 and the first forwarding chip is shown with a bold solid line, and the aggregated mark is marked with a circle.

It should be noted that, the active main control board processor and the standby main control board processor configure the first aggregation group information on the main control boards where they are located. The first aggregation group information includes identification information of the first forwarding chip, information of the first port in the first forwarding chip for connecting with the line card, identification information of the second forwarding chip, and information in the second forwarding chip for connecting with the line card. Information about the connected second port. The line card is also used to configure the second aggregation group information on the line card, where the second aggregation group information includes information on the line card port on the line card used to connect to the first forwarding chip and the line card used to connect to the second forwarding chip port information.

The first aggregation group information and the second aggregation group information are introduced with reference to FIG. 6 . The identification information of the first forwarding chip is marked as card1, the identification information of the second forwarding chip is marked as card2, the information of the first port used to connect with the line card in the first forwarding chip is marked as p1, and the information of the second forwarding chip is marked as p1. The information of the second port connected to the line card is denoted as p1'. The first aggregation group information stored in the active main control board processor is {card1-p1, card2-p1'}; meanwhile, the standby main control board processor also stores the same first aggregation group information {card1-p1, card2- p1'}. The line card processor 1 stores second aggregation group information {line card 1-port1, line card 1-port2}.

It is worth mentioning that by configuring an aggregated link, there are two communication links between the line card and the first forwarding chip, so that in the event of an abnormality in one link, the traffic can be automatically transferred to the other. On the normal communication link, the reliability of the communication between the first forwarding chip and the line card is ensured.

In another example, if the first forwarding chip and the second forwarding chip are connected through two communication ports. Configure another port in the first forwarding chip for connecting to the second forwarding chip as a third stacking port; configure the first stacking port and the third stacking port as a third aggregation group, store corresponding third aggregation group information, and The three-aggregation information includes port information of the third stack port and port information of the first stack port. The standby main control board processor is further configured to configure another port in the second forwarding chip for connecting to the first forwarding chip as a fourth stacking port; configure the second stacking port and the fourth stacking port as a fourth aggregation group, and Fourth aggregation group information is stored, where the fourth aggregation group information includes port information of the second stack port and port information of the fourth stack port. The first aggregation group, the second aggregation group, the third aggregation group and the fourth aggregation group are connected to each other to form an aggregation link.

The following describes the case where the first forwarding chip and the second forwarding chip are connected through two communication ports with reference to FIG. 7 .

As shown in the connection relationship shown in Figure 7, the port p4 in the first forwarding chip is configured as the third stacking port, the port p4' in the second forwarding chip is configured as the fourth stacking port, and the main control board processor is used to connect the Ports p3 and p4 are configured as a third aggregation group, and ports p3' and p4' are configured as a fourth aggregation group. As shown in FIG. 7 , the identification information of the first forwarding chip is marked as card1, the identification information of the second forwarding chip is marked as card2, the information of the first port in the first forwarding chip for connecting to the line card is marked as p1, and the first The information of the second port in the two forwarding chips for connecting with the line card is denoted as p1'. The first stack port is denoted as p3, the third stack port is denoted as p4, the second stack port is denoted as p3', and the fourth stack port is denoted as p4'. The first aggregation group information stored in the active main control board processor is {card1-p1, card2-p1'}; meanwhile, the standby main control board processor also stores the same first aggregation group information {card1-p1, card2- p1'}. The line card processor 1 stores second aggregation group information {line card 1-port1, line card 1-port2}. The third aggregation group information stored by the processor of the active main control board is {card1-p3, card1-p4}, and the fourth aggregation group information is {card2-p3', card2-p4'}.

Since the first forwarding chip and the second forwarding chip are each connected through two ports, there are two communication links between the first forwarding chip and the second forwarding chip, and they are configured as an aggregation group. If one of the links is abnormal, the If it is in the disconnected state, the communication between the first forwarding chip and the second forwarding chip will not be affected, which further improves the reliability of the communication between the boards.

In one example, the interconnected ports in the network device are all configured in the auto-negotiation mode; or, the interconnected ports in the network device are all configured in the remote fault notification mode.

For example, as shown in Figure 7, when the interconnected ports work at 100M or 1G or 2.5G, the line card port 1 in the line card processor and the port p1 of the first forwarding chip are both configured in auto-negotiation mode. , the port p1' of the second forwarding chip and the line card port 2 of the line card processor are also configured in auto-negotiation mode, and the communication port p3 on the first forwarding chip and the communication port p3' on the second forwarding chip are configured as In the auto-negotiation mode, the communication port p4 on the first forwarding chip and the communication port p4' on the second forwarding chip are configured in the auto-negotiation mode. Or, when the interconnected port is 10G, the line card port 1 and port p1 in the line card processor are configured in forced mode, and the remote fault notification function is enabled. Similarly, the port p1' on the second forwarding chip is connected to The line card port 2 in the line card processor is also configured in the forced mode, and the remote fault notification function is enabled, and the communication port p3 of the first forwarding chip and the communication port p3' on the second forwarding chip are configured in the forced mode, The communication port p4 of the first forwarding chip and the communication port p4' of the second forwarding chip are configured in forced mode, and the remote fault notification function is enabled.

In the auto-negotiation mode, the two connected ports can learn the state of the opposite end from each other, so that the two connected ports maintain the same port state. After the remote fault notification function is enabled on the 10G port, if one of the two interconnected ports fails, it will actively notify the peer end to keep the peer port in the same link state.

When a failure occurs, the working process of this network device is as follows.

In one example, the active main control board processor is further configured to: if it is detected that the physical state of the first port changes, delete or add the first port aggregation information in the first aggregation group information, and reset the first port the logical forwarding state, and send the information of the physical state of the first port to the standby main control board processor, so that the standby main control board processor can delete or add the first port in the first aggregated information on the main control board where it is located Aggregation information, wherein the first port aggregation information includes information of the first port and identification information of the first forwarding chip. The standby main control board processor is further configured to: if it is detected that the physical state of the second port changes, delete or add the second port aggregation information in the first aggregation group information, reset the logical forwarding state of the second port, and Sending information about the physical state of the second port to the active main control board processor, so that the active main control board processor deletes or adds the second port aggregation information in the first aggregation information on the main control board where it is located, wherein , the second port aggregation information includes information of the second port and identification information of the second forwarding chip. The line card is also used for: if it is detected that the physical state of the line card port changes, delete or add the line card port aggregation information in the second aggregation information, and reset the logical forwarding state of the line card port of the changed state, and the line card Port aggregation information includes port information of line card ports.

For example, the processor of the active main control board detects that the physical state of the first port is changed from the connected state to the disconnected state, and deletes the information of the first port and the identification information of the first forwarding chip in the first aggregation group information ; reset the logical forwarding state of the first port to a disabled state or a blocked state, and send the information that the first port is in a disconnected state to the standby main control board processor, and the standby main control board processor will also store the first The information of the first port and the identification information of the first forwarding chip are deleted from the aggregation group information. Each line card port in the line card has a port scanning task, and the line card processor detects the disconnected line card port, and deletes the information of the disconnected line card port from the second aggregation group information, Set the logical forwarding state of the line card port in the disconnected state to the disabled state or the blocked state.

The processor of the active main control board detects that the physical state of the first port is changed from the disconnected state to the connected state, and adds the information of the first port and the identification information of the first forwarding chip to the first aggregation group information; Set the logical forwarding state of the first port to the forwarding state, and send the information that the first port is in a connected state to the standby main control board processor, and the standby main control board processor also adds this information to the stored first aggregation group information. information of the first port and identification information of the first forwarding chip. Each line card port in the line card has a port scanning task. The line card processor detects that the line card port changes from the disconnected state to the connected state, and adds the information of the line card port in the connected state from the second aggregation group information. , set the logical forwarding state of the line card port in the connected state to the forwarding state.

The processor of the active main control board detects that the physical state of the first stack port and/or the third stack port is changed from the disconnected state to the connected state, and adds the information of the first stack port and/or the third aggregation group information to the information of the third aggregation group. or the information of the third stack port; reset the logical forwarding state of the first stack port and/or the third stack port to the forwarding state. If the processor of the active main control board detects that the physical state of the first stack port and/or the third stack port is changed from the connected state to the disconnected state, the information of the first stack port and/or the information of the first stack port are deleted from the third aggregation group information /or information of the third stack port; reset the logical forwarding state of the first stack port and/or the third stack port to the disabled state, or reset the logical forwarding state of the first stack port and/or the third stack port is blocked.

The working process in the event of failure will be described in detail below with reference to FIG. 7 .

As shown in Figure 7, when the processor of the active main control board detects that the port p1 of the first forwarding chip is changed from the connected state to the disconnected state, it deletes {card1-p1} from the first aggregation group information, and the port p1 The logical forwarding state is set to the disabled state or the blocking state, and the information that the port p1 is in the disconnected state is sent to the standby main control board processor, and the standby main control board processor is located in the first aggregation group on the main control board. Delete {card1-p1} from the message. When the active main control board processor detects that the port p1 of the first forwarding chip has changed from the disconnected state to the connected state, it adds {card1-p1} from the first aggregation group information, and sets the logical forwarding state of the port p1 to forwarding state, and send the information of the connection state of the port p1 to the standby main control board processor, and the standby main control board processor adds {card1-p1} information to the first aggregation group information on the main control board where it is located. .

When the standby main control board processor detects that the port p1' of the second forwarding chip has changed from the connected state to the disconnected state, it deletes {card2-p1'} from the first aggregation group information, and logically forwards the port p1'. The state is set to the disabled state or the blocked state, and the information of the disconnection state of the port p1' is sent to the processor of the active main control board, and the processor of the active main control board is located in the first aggregation group on the main control board. Also delete {card2-p1'} from the message. When the standby main control board processor detects that the port p1' of the second forwarding chip has changed from the disconnected state to the connected state, it adds {card2-p1'} from the first aggregation group information, and logically forwards the port p1'. The state is set to the forwarding state, and the information of the connection state of the port p1' is sent to the active main control board processor, and the active main control board processor is also added to the first aggregation group information on the main control board where it is located. {card2-p1'} information.

The line card processor periodically detects each line card port. If it detects that the line card port 1 is changed to the disconnected state, it deletes {line card 1-port1} from the second aggregation group information, and removes the line card in the disconnected state. Port 1 is set to the blocking state; if the line card detects that the line card port 2 has changed from the disconnected state to the connected state, it will add {line card 1-port2} from the second aggregation group information, and the line card in the connected state will be added. Port 2 is set to forwarding state.

When the processor of the active main control board detects that the stack port p3 changes from the connected state to the disconnected state, it deletes the information of the stack port p3 from the third aggregation group information of the active main control board, and sets the stack port p3 to block state. When the processor of the standby main control board detects that the stack port p3' changes from the connected state to the disconnected state, it deletes the information of the stack port p3' from the information of the fourth aggregation group on the standby main control board, and stores the stack port p3'. Set to blocking state. When the processor of the active main control board detects that the stack port p3 changes from the disconnected state to the connected state, the processor of the active main control board adds the stack port p3 to the third aggregation group of the active main control board, and sets the stack port p3 to the forwarding state. When the processor of the standby main control board detects that the stack port p3' changes from the disconnected state to the connected state, it adds the stack port to the fourth aggregation group information of the standby main control board, and sets the stack port p3' to the forwarding state .

In this example, the main main control board and the standby main control board are connected through two communication ports, which further improves the stability of the communication between the main main control board and the line card.

The third embodiment of the present disclosure relates to a network device, and the third embodiment is another way of implementing inter-board communication in the active-standby mode of the first embodiment. The connection mode between the main main control board, the standby main control board and the line card in the network device is the same as the connection structure in the first embodiment or the second embodiment. FIG. 8 is a schematic diagram of this embodiment.

In one example, both the first communication link and the second communication link are normal links. If the active main control board processor is configured as the link control end, the main main control board processor and the standby main control board processor are used to perform the following processing: set the port in the specified communication link to the enabled state, To enable the specified communication link as the main communication link; set the ports in other communication links to the disabled or blocked state, and delete the ports that are set to the disabled or blocked state from the MAC address table stored in each Corresponding MAC address, so that other communication links can be used as backup communication links. The line card is used to delete the MAC address corresponding to the port in the standby communication link from the MAC address table stored in the line card, so that the standby communication link and the active communication link form an active-standby mode.

If the line card is configured as the link control terminal, the line card is used to perform the following processing: set the port in the specified communication link to the enabled state to enable the specified communication link as the main communication link; The ports in the communication link are set to the disabled state or the blocked state, and the MAC address corresponding to the port set to the disabled state or the blocked state is deleted from the MAC address table stored in the line card, so that other communication links can be used as backup communication links. road. The main main control board processor and the standby main control board processor are also used for: detecting that the MAC address corresponding to the port in the standby communication link is deleted from the respective stored MAC address tables, so that the standby communication link can communicate with the main control board. Links form active/standby mode.

For example, the port connected to the second forwarding chip can be set to the normal Ethernet port mode, and the second forwarding chip can also set the port connected to the first forwarding chip to the normal Ethernet port mode. If the communication link between the main control board and the line card is a normal communication link, you can choose to open the first communication link and close the second communication link, that is, the first communication link is used as the designated communication link . The way to open the first communication link is: if the main control board processor is configured as the link control terminal, the main control board processor sets the port in the first communication link to the enable state , and set the logical forwarding state to forwarding state. The way to close the first communication link is to set the port in the first communication link to a disabled state or a blocked state and delete the MAC address of the port from the MAC address table stored in the current board, and notify the standby master at the same time. The control board processor, the standby main control board processor sets the port in the standby communication link into a disabled state or a blocked state, and deletes the MAC address of the port from the MAC address table stored by the standby main control board processor. The line card is used to delete the MAC address corresponding to the port in the standby communication link from the MAC address table stored in the line card, so that the standby communication link and the active communication link form an active-standby mode. When the first communication link is interrupted, the first link is closed and the second link is opened. The way of opening the second communication link is to set the port where the second communication link is located to an enable state, and set the logical forwarding state of the port to the forwarding state. The way of closing the second communication link is to set the port where the second communication link is located to a disabled state or a blocked state and delete the MAC address from the locally stored MAC address table.

The method of opening the first communication link is as follows: if the line card is configured as the link control terminal, the port in the designated communication link is set to the enabled state to enable the designated communication link as the main communication link; The ports in other communication links are set to the disabled or blocked state, and the MAC address corresponding to the port that is set to the disabled or blocked state is deleted from the MAC address table stored in the line card, so that other communication links can be used as backup communication link. At the same time, the main main control board processor and the standby main control board processor are also used for: detecting the port in the standby communication link, and deleting the MAC address corresponding to the port of the standby communication link from the MAC address table stored in each, In order to make the standby communication link and the active communication link form the active-standby mode.

Note: The method of using the main control board as the control terminal and the line card as the control terminal has been described in detail above, so it is not necessary to repeat them here.

In one example, if the first communication link and the second communication link are in the active/standby mode, the active main control board processor, the standby main control board processor, and the line card are further configured to perform the following processing: Periodic detection is in The port of the main communication link corresponds to the port state. If it is detected that the state of the corresponding port of the port changes to the disconnected state, the standby communication link is activated and the current main communication link is disconnected.

The active main control board processor periodically detects the state of the port connected with the first forwarding chip and the line card, and the standby main control board processor periodically detects the state of the port connected with the second forwarding chip and the line card. If both ports are in a connected state, the first communication link is preferably opened and the second communication link is closed. If the port of the active main control board is in a disconnected state and the port of the standby main control board is in a connected state, the first communication link is closed and the second communication link is opened. If the port of the standby main control board is in a disconnected state and the port of the active main control board is in a connected state, the second communication link is closed and the first communication link is opened. If both ports are disconnected, both communication links are closed.

Similarly, the line card processor periodically detects the state of the line card port connected to the first forwarding chip and the state of the line card port connected to the second forwarding chip. Open the first communication link and close the second communication link. If the line card port of the first communication link is in a disconnected state and the line card port of the second communication link is in a connected state, the first communication link is closed and the second communication link is opened. If the line card port of the second communication link is in a disconnected state and the line card port of the first communication link is in a connected state, the second communication link is closed and the first communication link is opened. If both line card ports are disconnected, both communication links are closed.

If the processor of the main main control board sets the first communication link and the second communication link in the active/standby mode, the working process of the active/standby mode will be described below with reference to FIG. 8 .

In one example, the active main control board processor sets the p1 port to enabled and the p1 port is in the connected state, the active main control board processor sets the p1' port of the standby main control board processor to the disabled state, and the line The card processor detects that the line card port connected to the port p1' of the second forwarding chip is in a disconnected state, and deletes the MAC address corresponding to the disconnected line card port from the local MAC address table stored in the line card. A first communication link communicates. When the active main control board processor detects that the p1 port is disconnected, it deletes the MAC address of the p1 port from the MAC address table of this board, and sets the p1' port of the standby main control board processor to the enabled state , and the p1' port is connected. The line card processor detects that the line card port connected to the first forwarding chip p1' is in a disconnected state, and deletes the MAC address corresponding to the disconnected line card port from the local MAC address table stored in the line card. The second communication link communicates.

In another example, the line card sets the port connected to the p1 port of the active main control board to the enabled state, and the line card port connected to the p1 port on the line card is in the connected state, then the line card will communicate with the standby main control board. The line card port connected to the p1' port of the control board processor is set to be disabled, and the standby main control board processor detects that the p1' port is disconnected, and stores the corresponding MAC address of the p1' port from the standby main control board processor. is deleted from the local MAC address table, and the first communication link is used for communication at this time. When the line card detects that the line card port connected to the processor p1 of the active main control board is disconnected, it deletes the MAC address of the line card port from the MAC address table of this board, and connects it with the standby main control board. The line card port connected to the p1' port of the processor is set to the enabled state, and the line card port is in the connected state. When the processor of the main main control board detects that the p1 port is disconnected, it deletes the MAC address corresponding to the p1 port from the MAC address table stored on the board, and uses the second communication link for communication at this time.

In this example, similar to the second embodiment, the interconnected ports are all configured in the auto-negotiation mode when the rate is 10M or 100M or 1G or 2.5G. It is configured in forced mode at 10G, and the remote error notification function of the chip needs to be turned on. When one end of the link is disconnected, the port on the opposite end will also change to the disconnected state. Therefore, each main control board and line card can set the forwarding state as long as it detects the connection state of the port of its own line card. Do additional synchronization between the master and the line cards.

In the active-standby configuration mode, one of the inter-board communication links between the active main control board and the line card is active and the other is standby. When the port disconnection occurs on the first communication link, switch to the second communication link. At the same time, it can also report to the police to avoid repeated switching.

The fourth embodiment of the present disclosure relates to a method for inter-board communication, which is applied to the network device in the above-mentioned embodiments, and the process is shown in FIG. 9 .

Step 401: Configure at least two communication links formed between the active main control board and the line card.

The network device includes an active main control board, a standby main control board and at least one line card. The main main control board includes a main main control board processor and a first forwarding chip connected to the main main control board processor. The standby main control board includes a standby main control board processor and a second forwarding chip connected to the standby main control board processor. The first forwarding chip is connected to a line card port of the line card to form a first communication link between the first forwarding chip and the line card. The first forwarding chip and the second forwarding chip are connected through at least one communication port, and the second forwarding chip is connected with another line card port of the line card to form a second communication link between the first forwarding chip and the line card. The active main control board processor is configured to configure the first communication link and the second communication link to be in the load sharing mode, or configured to configure the first communication link and the second communication link to be the active and standby communication mode.

For example, in this example, the network device may be a plug-in network device, the board is connected to the backplane in a plug-in manner, and the backplane is provided with a metal connector connected to the line card. The outside of the network equipment is a frame structure, which is used to protect the board and facilitate the setting of the backplane. In this example, the board includes an active main control board, a standby main control board, and line cards, and there are multiple line cards, for example, two line cards, three or more line cards, and so on. Each line card is provided with at least two line card ports. If there are more than two standby main control boards, more than three line card ports can be configured on the line card. In this example, two line card ports are used as an example.

There are two links between the main main control board and each line card, namely the first communication link and the second communication link. The first communication link is formed by connecting the first forwarding chip to the line card, and the second communication link is formed by connecting the first forwarding chip to the second forwarding chip, and the second forwarding chip is connected to the line card. There may be one or more than two communication links between the first forwarding chip and the second forwarding chip, that is, port a of the first forwarding chip is connected to port a of the second forwarding chip, and the first forwarding chip is connected to port a of the second forwarding chip. The b port of the chip is connected to the b port of the second forwarding chip to form two or more communication links between the first forwarding chip and the second forwarding chip.

Step 402: If any of the boards detects that any communication link between the main main control board and the line card is abnormal, another normal communication link is used to enable the main main control board to communicate with the line card.

In the load sharing mode, the two communication links work at the same time. When one communication link is disconnected, the traffic is automatically forwarded to another normal communication link. In the active/standby mode, if the first communication link between the active main control board and the line card is abnormal, but the second communication link between the standby main control board and the line card is normal, you can switch to the standby main control board. A second communication link between the board and the line card communicates. Similarly, if the second communication link between the standby main control board and the line card is abnormal, but the first communication link between the active main control board and the line card is normal, it can be switched to the active main control board. Communicates with the first communication link between the line cards. If both communication links are normal, the first communication link is preferred for communication.

The fifth embodiment of the present disclosure relates to a computer-readable storage medium storing a computer program, and the computer program implements the above-mentioned functions when executed by a processor.

Those skilled in the art can understand that all or part of the steps in the method of the above embodiments can be completed by instructing the relevant hardware through a program. The program is stored in a storage medium and includes several instructions to make a device (which may be a single-chip microcomputer) , chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as U disk, removable hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk.

Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present disclosure, and in practical applications, various changes in form and details can be made without departing from the spirit and the spirit of the present disclosure. scope.

Claims

A network device, wherein the included boards include: an active main control board, a backup main control board, and at least one line card;

The main main control board and the standby main control board are connected through at least one communication port;

The line card is provided with at least two line card ports for inter-board communication, and at least two of the line card ports are respectively connected to the main main control board and the standby main control board, forming at least two the communication link between the main main control board and the line card;

If any of the boards detects that any one of the communication links between the active main control board and the line card is abnormal, another normal communication link is used, so that the main The main control board communicates with the line cards.
The network device according to claim 1, wherein the main main control board comprises: a main main control board processor and a first forwarding chip connected to the main main control board processor; the backup main control board The control board includes: a standby main control board processor and a second forwarding chip connected to the standby main control board processor;

The first forwarding chip is connected to any one of the line card ports to form a first communication link between the main main control board processor and the line card;

The first forwarding chip and the second forwarding chip are connected through at least one of the communication ports, and the second forwarding chip is connected with the other port of the line card to form the first forwarding chip. a second communication link between the forwarding chip and the line card;

The main main control board processor is configured to configure the first communication link and the second communication link to be in a load sharing mode, or configured to configure the first communication link and the second communication link The road is in active and standby mode.
The network device according to claim 2, wherein the active main control board processor is configured to: configure a communication port in the first forwarding chip for connecting the second forwarding chip to be a first stack port; The standby main control board processor is configured to configure the communication port in the second forwarding chip for connecting the first forwarding chip as a second stack port;

The main main control board processor and the standby main control board processor are respectively used for: connecting the port in the first forwarding chip for connecting the line card and the port on the second forwarding chip for connecting The port of the line card is configured as a first aggregation group; the line card is used to configure the line card port connected with the main chip and the line card port connected with the backup chip as the board The second aggregation group of ;

Wherein, the first aggregation group is connected with the second aggregation group to form an aggregation link, so that the first communication link and the second communication link are in a load sharing mode.
The network device according to claim 3, wherein the active main control board processor and the standby main control board processor configure the first aggregation group information on the main control boards where they are located;

The first aggregation group information includes: identification information of the first forwarding chip, information of the first port in the first forwarding chip for connecting with the line card, identification information of the second forwarding chip, and the information of the second port in the second forwarding chip for connecting with the line card;

The line card is further configured to configure second aggregation group information on the line card, where the second aggregation group information includes: information on the line card used to connect the line card port of the first forwarding chip and information on the line card port used to connect the second forwarding chip.
The network device according to claim 4, wherein, if the main main control board processor configures the first communication link and the second communication link to be a load sharing mode;

The active main control board processor is further configured to delete or add the first port aggregation information in the first aggregation group information if it is detected that the physical state of the first port has changed, and reset the the logical forwarding state of the first port, and send information about the physical state of the first port to the standby main control board processor for the first port of the standby main control board processor on the main control board where the standby main control board processor is located. Deleting or adding the first port aggregation information from the aggregation information, wherein the first port aggregation information includes: the information of the first port and the identification information of the first forwarding chip;

The standby main control board processor is further configured to delete or add second port aggregation information in the first aggregation group information, and reset the second port aggregation information if it is detected that the physical state of the second port changes. The logical forwarding state of the second port, and send the information of the physical state of the second port to the active main control board processor, so that the active main control board processor can be used for the second port on the main control board where the active main control board processor is located. The second port aggregation information is deleted or added in a piece of aggregation information, wherein the second port aggregation information includes: the information of the second port and the identification information of the second forwarding chip;

The line card is also used for: if it is detected that the physical state of the line card port changes, delete or add line card port aggregation information in the second aggregation information, and reset the line card in the changed state The logical forwarding state of the port, and the line card port aggregation information includes: port information of the line card port.
The network device according to claim 2, wherein, if the active main control board processor is configured as a link control end, the main main control board processor and the standby main control board processor are configured to execute the following: Processing: Set the port in the specified communication link to the enabled state to enable the specified communication link as the main communication link; set the port in the other communication link to the disabled or blocked state, and use the specified communication link as the main communication link. Delete the MAC address corresponding to the port set to the disabled state or the blocked state from the MAC address table stored in each, so that other communication links can be used as backup communication links; the line card is used to be in the backup communication link. The MAC address corresponding to the port is deleted from the MAC address table stored in the line card, so that the standby communication link and the main communication link form an active-standby mode;

If the line card is configured as the link control terminal, the line card is configured to perform the following processing: set the port in the designated communication link to the enabled state, so as to enable the designated communication link as the main communication link link; set the ports in other communication links to the forbidden state or the blocked state, and delete the MAC address corresponding to the port that is set to the forbidden state or the blocked state from the MAC address table stored in the line card, so that the Other communication links are used as backup communication links; the active main control board processor and the backup main control board processor are also used to: detect that the MAC address corresponding to the port in the backup communication link is stored from the respective stored ones. The MAC address table is deleted, so that the standby communication link and the active communication link form an active-standby mode.
The network device according to claim 6, wherein the first communication link and the second communication link are in active/standby mode;

The main main control board processor, the standby main control board processor, and the line card are further configured to perform the following processing: Periodically detect the port state corresponding to the port in the main communication link, and if detected When the state of the corresponding port of the port is changed to the disconnected state, the backup communication link is enabled, and the current active communication link is disconnected.
The network device according to claim 3, wherein the first forwarding chip and the second forwarding chip are connected by two communication ports;

The active main control board processor is further configured to: configure another port in the first forwarding chip for connecting to the second forwarding chip as a third stacking port; connect the first stacking port and the The third stack port is configured as a third aggregation group, and stores corresponding third aggregation group information, where the third aggregation information includes: port information of the third stack port and port information of the first stack port;

The standby main control board processor is further configured to configure another port in the second forwarding chip for connecting the first forwarding chip as a fourth stacking port; the second stacking port and the fourth The stack port is configured as a fourth aggregation group, and stores fourth aggregation group information, where the fourth aggregation group information includes: port information of the second stack port and port information of the fourth stack port;

Wherein, the first aggregation group, the second aggregation group, the third aggregation group and the fourth aggregation group are interconnected to form an aggregation link.
The network device according to claim 8, wherein the active main control board processor is further configured to: detect that the physical state of any stack port in the third aggregation group is changed, then in the third aggregation group Delete or add the first stack port change information in the aggregation group information, and reset the logical forwarding state of the stack port, wherein the first stack port change information includes: the physical state on the active main control board processor occurs. Port information corresponding to the changed stack port;

The standby main control board processor is further configured to: detect that the physical state of any stack port in the fourth aggregation group is changed, and delete or add the second stack port change information in the fourth aggregation group information , reset the logical forwarding state of the stack port, wherein the second stack port change information includes: port information corresponding to the stack port whose physical state is changed on the processor of the standby main control board.
The network device according to claim 2, wherein two interconnected ports in the network device are both configured in an auto-negotiation mode; or, both interconnected ports in the network device are configured as remote fault notification model.
An inter-board communication method, applied to the network device according to any one of the preceding claims, the method comprising:

Configure at least two communication links formed between the main main control board and the line card;

If any board detects that any communication link between the main main control board and the line card is abnormal, another normal communication link is used to enable the main main control board to communicate with the line card.
A computer-readable storage medium storing a computer program, the computer program implementing the steps of the method according to claim 11 when executed by a processor.