WO2022267937A1

WO2022267937A1 - Protocol calculation method, switch, cross-device link aggregation system, and storage medium

Info

Publication number: WO2022267937A1
Application number: PCT/CN2022/098762
Authority: WO
Inventors: 林宁
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-06-21
Filing date: 2022-06-14
Publication date: 2022-12-29
Also published as: CN115514698A

Abstract

A protocol calculation method, a switch, a cross-device link aggregation system, and a storage medium. The protocol calculation method is used for the cross-device link aggregation system that comprises a first device and a second device, and comprises: receiving a second protocol packet sent by the second device (S100); performing protocol calculation on the second protocol packet to obtain a second protocol calculation result (S200); and sending the second protocol calculation result to the second device (S300).

Description

Protocol calculation method, switch, cross-device link aggregation system and storage medium

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110686533.X and a filing date of June 21, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The embodiments of the present application relate to but are not limited to the field of communication technologies, and in particular, relate to a protocol calculation method, a switch, a cross-device link aggregation system, and a storage medium.

Background technique

As the network scale continues to expand, users have higher and higher requirements for the bandwidth and reliability of backbone links. In related technologies, the bandwidth is often increased by replacing a high-speed interface board or a device supporting a high-speed interface board, but this method requires high costs and is not flexible enough.

The use of MCLAG technology can achieve the purpose of increasing link bandwidth by bundling multiple physical interfaces into one logical interface without hardware upgrades. While achieving the purpose of increasing the bandwidth, link aggregation adopts the mechanism of backup links, which can effectively improve the reliability of links between devices.

Taking the switch device in the network as an example, since the cross-device link aggregation switch system is considered as a logical device in the entire network, when forwarding packets and performing protocol interaction between the server side and the gateway side , forwarding in the cross-device link aggregation switch system in load balancing mode. However, if the cross-device link aggregation switch system needs to participate in protocol calculation, real-time protocol synchronization between two cross-device link aggregation switches is required, which will not only increase the complexity of software processing at the protocol level, but also lead to real-time Increased risk of synchronization failures.

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

The embodiment of the present application provides a protocol calculation method, a switch, a cross-device link aggregation system, and a storage medium. After obtaining the protocol message, the standby device in the cross-device link aggregation system directly forwards it to the master device without performing protocol calculation. The master device performs protocol calculation and then sends it to the backup device to complete the synchronization of the protocol status between the master and backup devices, which can avoid frequent synchronization of the master and backup devices after separate protocol calculations, and complete active-active cross-device link aggregation more simply, quickly and accurately The system's protocol calculation improves the usability and reliability of the network.

In the first aspect, the embodiment of the present application provides a protocol calculation method for a cross-device link aggregation device system including a first device and a second device, and the method includes the following steps: receiving performing protocol calculation on the second protocol message to obtain a second protocol calculation result; sending the second protocol calculation result to the second device. In this method, the first device completes all protocol calculations and sends the protocol calculation results to the second device to complete the synchronization, so that the second device does not participate in the protocol calculation at all, which can avoid frequent synchronization between the two devices after separate protocol calculations, and is simpler Quickly and accurately complete the protocol calculation of the active-active cross-device link aggregation system, improving the usability and reliability of the network.

In the second aspect, the embodiment of the present application provides a protocol calculation method for an inter-device link aggregation device system including a first device and a second device, the method includes the following steps: sending the second protocol message to The first device: receiving the protocol calculation result calculated by the first device, and performing synchronization. The second device in this method does not perform protocol calculation, but only performs protocol forwarding and protocol calculation result synchronization, which reduces the possibility of data link transmission delay loss, improves the success rate of protocol state synchronization, and is simpler and faster And accurately complete the protocol calculation of the active-active cross-device link aggregation system to improve the usability and reliability of the network.

In the third aspect, the embodiments of the present application also provide a switch, at least including: a memory, a processor, and a computer program stored in the memory and operable on the processor, when the processor executes the program Realize the protocol calculation method as described in the first aspect or the second aspect.

In the fourth aspect, the embodiment of the present application also provides a cross-device link aggregation system, including a first device and a second device; the first electronic device includes: a first memory, a first processor, and a A computer program on a memory that can run on a first processor, when the first processor executes the program, implements the protocol computing method as described in the first aspect; correspondingly, the second electronic device includes: A second memory, a second processor, and a computer program stored on the second memory and operable on the second processor, when the second processor executes the program, the protocol calculation method as described in the second aspect is realized .

In the fifth aspect, the embodiments of the present application also provide a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the protocol described in the first aspect or the second aspect. Calculation method.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

FIG. 1 is a schematic diagram of a protocol synchronization framework of an inter-device link aggregation switch system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a master device protocol calculation method provided by an embodiment of the present application;

FIG. 3 is a schematic flow chart of a method for calculating a backup device protocol provided by another embodiment of the present application; and

FIG. 4 is a schematic diagram of a protocol synchronization framework of an inter-device link aggregation switch system provided by an embodiment of the present application.

detailed description

In order to make the purpose, technical solutions and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be noted that although the functional modules are divided in the schematic diagram of the device, and the logical sequence is shown in the flowchart, in some cases, it can be executed in a different order than the module division in the device or the flowchart in the flowchart. steps shown or described. The terms "first", "second" and the like in the specification and claims and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.

The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

MCLAG is a mechanism for cross-device link aggregation. It performs cross-device link aggregation between one device and two other devices, thereby improving link reliability from the board level to the device level, forming a dual-active system. The device performing link aggregation can be not only a switch, but also other network devices such as routers. The embodiment of the present application will use a switch as an example for illustration, but those skilled in the art know that the protocol calculation method involved in the present application is also applicable to a cross-device link aggregation system composed of other network devices.

In general, since the cross-device link aggregation switch system is considered as a logical device in the entire network, when forwarding packets and performing protocol interaction between the server side and the gateway side, it is based on load balancing The mode is forwarded in the inter-device link aggregation switch system.

However, if the cross-device link aggregation switch system needs to participate in the protocol calculation, it is necessary to synchronize the protocol between the two cross-device link aggregation switch systems, but this will bring many problems. Real-time synchronization of the state machine between two switch devices requires running private messages or private packets between the two switch devices to transmit the protocol state machine; at the same time, due to the possibility of failure in real-time synchronization, when two switch devices When the state machine is synchronized in real time, it must be transmitted through the connection link between the two switch devices, and the data may be delayed or lost in the transmission of the link, which will affect the success rate of the protocol state machine synchronization.

Based on this, the embodiment of the present application provides a protocol calculation method. The first device completes all protocol calculations and sends the protocol calculation results to the second device to complete synchronization, so that the second device does not participate in the protocol calculation at all, which can avoid two Frequent synchronization after separate protocol calculations of each device reduces the possibility of data link transmission delay loss, improves the success rate of protocol state synchronization, and completes the hyperactive-active cross-device link aggregation system more simply, quickly and accurately. Protocol computing improves the usability and reliability of the network.

The embodiments of the present application will be further described below in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of a protocol synchronization framework of a cross-device link aggregation switch system, describing the working principle of a dual-active cross-device link aggregation switch system. As shown in the figure, switches A and B form a set of active-active cross-device link aggregation switch system, in which switch A is the master device, switch B is the backup device, and interface A1 of switch A and interface B1 of switch B form a cross-device aggregation chain The main link C1 of the server is connected to the A1 port of the switch A, and the backup link C2 of the server is connected to the B1 port of the switch B. The uplink A2 of the switch A and the uplink B2 of the switch B are connected to the gateway device G.

When gateway G needs to send data traffic to server C, it sends protocol packets and data packets to switches A and B based on the principle of load balancing. Algorithms to achieve load balancing include hash, consistent hashing, round robin scheduling, random mode, pure dynamic node load balancing, etc., and the protocol calculation method involved in this application can be based on any load balancing algorithm. Here, the hash algorithm is taken as an example. Gateway G hashes the data traffic to the A2 interface of switch A and the B2 interface of switch B in the inter-device link aggregation switch system. The packet is sent from port A1. Switch B checks the table according to its own table and sends the packet to server C through port B1. Server C correctly receives the two data streams that are load-balanced by two switches A and B respectively.

In the first aspect, the embodiment of the present application provides a protocol calculation method for a cross-device link aggregation device system including a first device and a second device, wherein the first device is the master device and the second device is the backup device . FIG. 2 is a schematic flowchart of a method for calculating a master device protocol provided by an embodiment of the present application.

As shown in Figure 2, the protocol calculation method provided in this embodiment at least includes:

Step S100: Receive a second protocol message sent by the second device.

In some embodiments, the load-balanced data packets and protocol packets will be sent to the master device and the backup device. Since the backup device will not process and calculate the protocol packets, the backup device will send these protocol packets The packets are forwarded to the master device through the directly aggregated peer-link interface. The master device receives the protocol packets forwarded by the backup device and performs protocol calculation in a centralized manner.

Algorithms for implementing load balancing include various algorithms such as hash, consistent hash, round-robin scheduling, random mode, and purely dynamic node load balancing. In the above-mentioned embodiments, the hash algorithm is used.

Step S200: Perform protocol calculation on the second protocol packet to obtain a second protocol calculation result.

In some embodiments, the master device CPU performs protocol calculation on the received second protocol packet sent by the backup device, and obtains a second protocol calculation result.

In some embodiments, based on the load balancing, the master device will also receive the protocol packet. At this time, the CPU of the master device performs protocol calculation on the first protocol packet directly received by the master device, and obtains the first protocol calculation result.

It is worth noting that the standby device only forwards the protocol packets, but not the data packets, that is, the data forwarding layer will not be affected in any way, and all data packets are still forwarded in the load balancing manner. The data traffic is shared between switches, which can separate data forwarding and protocol calculation in active and standby mode, thereby avoiding mutual influence.

Step S300: Send the calculation result of the second protocol to the second device.

In some embodiments, the master device sends the calculation result of the second protocol to the backup device through the direct-connect aggregated peer-link interface, thereby completing protocol state synchronization.

In some embodiments, the master device completes the protocol calculation, writes the generated entries into the master device hardware table, and completes the correct writing of the slave device hardware table through protocol state synchronization.

According to the protocol calculation method of this embodiment, the master device completes all the protocol calculations and sends the protocol calculation results to the backup device to complete synchronization, so that the backup device does not participate in the protocol calculation at all, which can avoid frequent synchronization between the two devices after separate protocol calculations. It is easier, faster and more accurate to complete the protocol calculation of the active-active cross-device link aggregation system, improving the usability and reliability of the network.

In the second aspect, the embodiment of the present application provides a protocol calculation method for a cross-device link aggregation device system including a first device and a second device, wherein the first device is the master device and the second device is the backup device . FIG. 3 is a schematic flowchart of a method for calculating a protocol of a backup device provided by an embodiment of the present application.

As shown in Figure 3, the protocol calculation method provided in this embodiment at least includes:

Step S400: Send a second protocol packet to the first device, wherein the second protocol packet is not calculated.

In some embodiments, the standby device first determines whether the received packet includes a protocol packet, and if it includes a protocol packet, transmits the second protocol packet to the directly-connected aggregation peer-link interface through redirection.

It is worth noting that there are many ways to redirect, which can be ACL (Access Control Lists, access control list) or capability relationship table (Capabilities List). Those skilled in the art know that any manner that can implement redirection through access control is within the scope of protection of the protocol computing method of the present application.

Step S500: Receive the protocol calculation result calculated by the first device, and perform protocol state synchronization.

In some embodiments, the backup device receives and obtains the protocol calculation result issued by the master device through the directly-connected aggregation peer-link interface, and completes the correct writing of the hardware table of the backup device according to the protocol calculation result, that is, the protocol state synchronization.

According to the protocol calculation method of this embodiment, the backup device does not perform protocol calculation, but only performs protocol forwarding and protocol calculation result synchronization, which reduces the possibility of data link transmission delay loss and improves the success rate of protocol state synchronization , to complete the protocol calculation of the active-active cross-device link aggregation system more simply, quickly and accurately, and improve the usability and reliability of the network.

In a third aspect, the embodiment of the present application provides a switch configured to implement the protocol calculation methods described in the first aspect and the second aspect.

In some embodiments, the switch is set as a master device and a backup device respectively, the link aggregation of the master device and the backup device forms a cross-device link aggregation switch system, the protocol calculation method described in the first aspect runs on the master device, and the backup device runs The protocol calculation method described in the second aspect.

In a fourth aspect, an embodiment of the present application provides a cross-device link aggregation system, including a master device and a backup device; wherein, the master device includes: a first memory, a first processor, and a system stored in the first memory and capable of A computer program running on the first processor, when the first processor executes the program, implements the protocol calculation method described in the first aspect of the embodiment of the present application; correspondingly, the backup device includes: a second memory, a first A second processor and a computer program stored on the second memory and operable on the second processor, when the second processor executes the program, implements the protocol computing method described in the second aspect of the embodiment of the present application.

In some embodiments, the cross-device link aggregation system is set in the entire network environment to form a protocol synchronization framework of the cross-device link aggregation switch system, as shown in FIG. 4 .

FIG. 4 describes the working principle of the active-active cross-device link aggregation switch system provided by the embodiment of the present application. As shown in the figure, switches A and B form a set of active-active cross-device link aggregation switch system, in which switch A is the master device, switch B is the backup device, and interface A1 of switch A and interface B1 of switch B form a cross-device aggregation chain The main link C1 of the server is connected to the A1 port of the switch A, and the backup link C2 of the server is connected to the B1 port of the switch B. The uplink A2 of the switch A and the uplink B2 of the switch B are connected to the gateway device G.

In some embodiments, when switch B detects a protocol message, it will directly forward the protocol message to switch A, that is, switch B will not perform any calculation and analysis actions on the protocol message, and all protocol calculations will be performed by switch A. After completion, the result of the protocol calculation of Switch A will be forwarded to Switch B through the direct-connected aggregation peer-link interface, so as to realize the synchronization of the protocol state between the two switches. It is worth noting that switch B only forwards protocol packets and does not forward data packets, that is, the data forwarding level will not be affected in any way, and all data packets are still forwarded in the load-balanced manner. The data traffic is shared between switches, which can separate data forwarding and protocol calculation in active and standby mode, thereby avoiding mutual influence.

According to the cross-device link aggregation system of this embodiment, the first device completes all the protocol calculations and sends the protocol calculation results to the second device to complete the synchronization, so that the second device does not participate in the protocol calculation at all, which can avoid the separation of the two devices. Frequent synchronization after protocol calculation reduces the possibility of data link transmission delay loss, improves the success rate of protocol status synchronization, and completes the protocol calculation of the active-active cross-device link aggregation system more simply, quickly and accurately. Improve network usability and reliability.

In the fifth aspect, the embodiments of the present application also provide a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the protocol calculation method described in the first aspect; or, execute the first aspect The protocol calculation method described in the second aspect.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media . The mobile terminal device can be a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle-mounted terminal device, a wearable device, a super mobile personal computer, a netbook, a personal digital assistant, a CPE, a UFI (wireless hotspot device), etc.; Specific limits.

The above is a specific description of the preferred implementation of the application, but the application is not limited to the above-mentioned implementation, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the application. Equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims

A protocol calculation method for a cross-device link aggregation device system including a first device and a second device, comprising:

receiving a second protocol packet sent by the second device;

performing protocol calculation on the second protocol message to obtain a second protocol calculation result; and

Send the calculation result of the second protocol to the second device.
The method according to claim 1, further comprising:

receiving the first protocol packet;

performing protocol calculation on the first protocol message to obtain a first protocol calculation result; and

sending the calculation result of the first protocol to the second device.
The method according to claim 2, wherein the first protocol packet and the second protocol packet are obtained according to a load balancing principle.
The method according to any one of claims 1-3, wherein the message transmission between the first device and the second device is performed through a directly-connected aggregation peer-link interface.
A protocol calculation method for a cross-device link aggregation device system including a first device and a second device, comprising:

sending a second protocol packet to the first device, the second protocol packet is not calculated; and

The protocol calculation result calculated by the first device is received, and the protocol state is synchronized.
The method according to claim 5, further comprising:

judging whether the received packet includes the second protocol packet; and

If yes, the second protocol packet is sent to the directly-connected aggregation peer-link interface through redirection, and sent to the first device.
A switch comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor implements the protocol according to any one of claims 1 to 6 when executing the program Calculation method.
A cross-device link aggregation system, including a first device and a second device, wherein:

The first device comprises: a first memory, a first processor, and a computer program stored on the first memory and operable on the first processor, when the first processor executes the program, it implements the claims The protocol calculation method described in any one of 1 to 4;

Correspondingly, the second device includes: a second memory, a second processor, and a computer program stored in the second memory and operable on the second processor. When the second processor executes the program, the The protocol computing method according to any one of claims 5 to 6.
A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the protocol computing method according to any one of claims 1 to 6.