CN115150453B - A method, system, device and storage medium for avoiding LACP protocol timeout - Google Patents

Abstract

The present invention provides a method, system, device and storage medium for avoiding LACP protocol timeout. The method includes: responding to the port channel management restart of the sending end, checking whether there is a warm-reboot identifier in the database, and responding to the presence of a warm-reboot identifier in the database. Reboot flag, send LACPDU package to the receiving end; in response to receiving the LACPDU package at the receiving end, confirm whether the predetermined field in the LACPDU package is zero; in response to the predetermined field in the LACPDU package is not zero, according to warm-reboot Set the timer for the number of seconds required to run, and set the LACP state machine to ignore the LACP timeout flag and continue to wait for the LACPDU packet; Said ignoring the LACP timeout flag and entering the normal timeout judging mode. When the present invention uses LACP, a short timeout can be configured and warm-reboot scenarios can be taken into account.

Description

A method, system, device and storage medium for avoiding LACP protocol timeout

technical field

The present invention relates to the communication field, and more specifically refers to a method, system, device and storage medium for avoiding LACP protocol timeout.

Background technique

At present, the Port Channel (Port Channel) established through LACP (Link Aggregation Control Protocol, Link Aggregation Control Protocol) will periodically send an LACPDU packet on each member port to ensure the status of this Port Channel. If the LACPDU packet sent by the other party is not received before three times the timeout period, this member port will not be included in the target of load balancing. Once all member ports enter this state, the operation status (oper status) of the PortChannel will change. into down. In addition to the interruption of the existing service flow, port down also means that the routing table will change and may cause unnecessary routing vibration. In the warm-reboot scenario, the upper layer management software of the LACP protocol will also be restarted. If the startup completes sending LACPDU packets before the timeout, the other party will determine that the Port Channel is disconnected and discard the traffic. The solution given in the LACP protocol for this problem is to configure the Timeout time as a long timeout (30s), so that the software has 90s The time can come to reboot.

There are three problems in the scheme of changing the long timeout configuration: 1. The timeout configuration is a request from the other party, which means how long the other party expects to receive LLDP. For poor models, 90s may not be enough time for the LACP management software to complete the restart, and there is still the possibility of packet loss; 3. Always configure a long timeout, which means that when the peer end really has a problem, it takes 90s for the switch to perceive the error And divert the traffic to other functioning member ports. In the same scenario, the short timeout is only 3s.

Contents of the invention

In view of this, the purpose of the embodiments of the present invention is to propose a method, system, computer equipment, and computer-readable storage medium for avoiding LACP protocol timeout. The present invention allows the use of LACP You can configure a short timeout and take into account the warm-reboot scenario, so that unnecessary port link down will not occur, which will affect the transmission of service packets.

Based on the above purpose, an aspect of the embodiment of the present invention provides a method for avoiding LACP protocol timeout, including the following steps: in response to the port channel management restart of the sending end, check whether there is a warm-reboot identifier in the database, and respond to the database There is a warm-reboot identifier in the receiving end, and the LACPDU packet is sent to the receiving end; in response to receiving the LACPDU packet, the receiving end confirms whether the predetermined field in the LACPDU packet is zero; in response to the predetermined field in the LACPDU packet is not zero, Set the timer according to the number of seconds required for warm-reboot to run, and set the LACP state machine to ignore the LACP timeout flag and continue to wait for the LACPDU packet; and respond to receiving the release packet from the sender or the timer has not yet been received LACPDU package, cancel the flag of ignoring LACP timeout and enter the normal timeout judgment mode.

In some embodiments, the method further includes: writing the warm-reboot identifier in the database of the sending end, and sending an interrupt signal to each process by using a custom signal representing warm-reboot.

In some embodiments, the method further includes: in response to the signal processor receiving a custom signal representing warm-reboot, sending a request to the LACP operator, the LACP operator sends the LACPDU packet three times to the port under the port channel, and continues to execute Interrupt program.

In some embodiments, the method further includes: in response to the predetermined field in the LACPDU packet being zero, entering a normal timeout determination mode in the LACP state machine.

Another aspect of the embodiments of the present invention provides a system for avoiding LACP protocol timeout, including: an identification module configured to respond to the port channel management restart of the sending end, check whether there is a warm-reboot identification in the database, and respond There is a warm-reboot mark in the database, and the LACPDU packet is sent to the receiving end; the confirmation module is configured to respond to the receiving end receiving the LACPDU packet, confirming whether the predetermined field in the LACPDU packet is zero; the setting module is used for configuration In response to the predetermined field in the LACPDU packet being non-zero, a timer is set according to the number of seconds required for warm-reboot operation, and the LACP state machine is set to ignore the LACP overtime mark and continue to wait for the LACPDU packet; and the module is released for configuration In response to receiving the release packet sent by the sender or the timer has not received the LACPDU packet when the timer expires, the flag of ignoring LACP timeout is removed and the normal timeout judgment mode is entered.

In some embodiments, the system further includes an interrupt module configured to: write the warm-reboot identifier in the database of the sending end, and send an interrupt signal to each process by using a custom signal representing warm-reboot.

In some embodiments, the system further includes a request module configured to: send a request to the LACP operator in response to the signal processor receiving a custom signal representing warm-reboot, and the LACP operator sends three requests to the port under the port channel LACPDU packet, and continue to execute the interrupt program.

In some embodiments, the system further includes a conversion module configured to: respond to the predetermined field in the LACPDU packet being zero, and enter a normal timeout determination mode in the LACP state machine.

In another aspect of the embodiments of the present invention, there is also provided a computer device, including: at least one processor; and a memory, the memory stores computer instructions executable on the processor, and the instructions are executed by the The steps of the above method are realized when the processor executes.

In yet another aspect of the embodiments of the present invention, a computer-readable storage medium is also provided, and the computer-readable storage medium stores a computer program for implementing the above method steps when executed by a processor.

The present invention has the following beneficial technical effects: by modifying the LACPDU content and the timeout judgment method of the LACP state machine, a short timeout can be configured when using LACP and warm-reboot scenarios can be taken into account, and unnecessary port link down will not occur, thereby affecting business Message transmission.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and those skilled in the art can obtain other embodiments according to these drawings without any creative effort.

Fig. 1 is the schematic diagram of the embodiment of the method for avoiding LACP protocol timeout provided by the present invention;

Fig. 2 is the schematic diagram of the embodiment of the system that avoids LACP protocol overtime provided by the present invention;

Fig. 3 is the hardware structure schematic diagram of the embodiment of the computer equipment that avoids LACP protocol overtime provided by the present invention;

Fig. 4 is a schematic diagram of an embodiment of a computer storage medium for avoiding LACP protocol timeout provided by the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

According to the first aspect of the embodiments of the present invention, an embodiment of a method for avoiding LACP protocol timeout is proposed. FIG. 1 is a schematic diagram of an embodiment of a method for avoiding LACP protocol timeout provided by the present invention. As shown in Figure 1, the embodiment of the present invention includes the following steps:

S1. In response to the port channel management restart of the sending end, check whether there is a warm-reboot identifier in the database, and send an LACPDU packet to the receiving end in response to the presence of a warm-reboot identifier in the database;

S2. In response to receiving the LACPDU packet at the receiving end, confirm whether the predetermined field in the LACPDU packet is zero;

S3. In response to the predetermined field in the LACPDU packet being not zero, set a timer according to the number of seconds required for warm-reboot operation, and set the LACP state machine to ignore the LACP timeout flag and continue to wait for the LACPDU packet; and

S4. In response to receiving the release packet sent by the sender or the timer expires and the LACPDU packet has not been received, release the flag of ignoring LACP timeout and enter the normal timeout determination mode.

PortChannel: A technology that integrates multiple physical ports into one logical port to increase the logical bandwidth. The traffic transmitted on it will be balanced through the load balancing algorithm. There are usually two ways to establish a Port Channel, one is static allocation, The second is to establish dynamically through the LACP protocol.

LACP is a protocol based on the IEEE802.3ad standard to realize link dynamic aggregation and de-aggregation, and it is a commonly used protocol in link aggregation. The member ports enabled with the LACP protocol in the link aggregation group communicate by sending LACPDU packets. The two parties reach an agreement on the ports that can send and receive packets, and determine the link that bears the service traffic. In addition, when the aggregation conditions change, such as a link failure, the LACP mode will automatically adjust the links in the aggregation group, and other available member links in the group will take over the failed link to maintain load balance.

There is a Timeout attribute in the LACP protocol, which is used to inform the receiving end how long the member port is disconnected if it does not receive the LACP message, and temporarily put the member port into the deselect state to avoid affecting the traffic forwarding to On the member port, there are currently two settings for this value, long timeout (30s) and short timeout (1s). After exceeding three times the timeout configuration, the member port will be determined to be disconnected.

Warm-reboot: In the data center, offline equipment means business interruption, especially once the switch in charge of the network is offline, the scope of the impact will be far-reaching. Once the software needs to be upgraded, it will lead to business interruption , so different from the general reboot, there is a reboot technology called warm-reboot, through backup database→restart the kernel and upper-layer software→restore the database, so as to update the software and avoid business interruption (because the chip is not affected Influence).

At present, the long timeout configuration in the LACP protocol is unidirectional, and there is no mechanism for reverse notification. The embodiment of the present invention allows the switch to notify the other switch temporarily during the warm-reboot period by expanding the content of the LACP packet and modifying the internal state machine of the LACP Stop the timeout judgment and switch back to the normal mode after the warm-reboot is over to ensure that the PortChannel will not be closed during the warm-reboot.

The sender will first write the warm-reboot flag (identification) in the database (database). This flag is used to allow the process to recognize whether the restart is a warm-reboot or a normal reboot after the process is restarted. Send an interrupt signal to each process to tell each process that the program should end. The embodiment of the present invention uses a self-defined signal SIGUSR to represent warm reboot to distinguish the SIGTERM signal used during normal reboot. When the signal handler (signal processor) knows that this is a warm-reboot, it will send a request (request) to the LACP runner (runner), and the LACPrunner will immediately send three specially crafted LACPDU packets to the port under the Port Channel, and then execute the original interrupt the flow of the program. After the port channel manager (manager) restarts, it will first go to the database to check whether the warm-rebootflag exists. If so, it means that it was a warm-reboot last time. At this time, it will send a special LACPDU packet to notify the counterpart that the warm-reboot process has completed. After the end, you can return to the normal LACP timeout mode.

The receiving end will analyze the LACPDU packet to confirm whether the specific field in the packet is zero. If it is not zero, it means that the peer end is about to enter warm-reboot. At the same time, the number of seconds required for warm-reboot can be known in the packet (assumed to be Y Seconds), the receiving end will do two things at this time, the first is to start a timer to set the timeout after Y seconds, and the second is to set the LACP state machine to temporarily ignore the LACP timeout. The reason for setting the timer is that the other party is warm -Remind to remove the state of ignoring the timeout after the reboot fails. Afterwards, the state machine continues to wait for the LACPDU packet. One case is that the other party actively sends a release packet after the warm-reboot succeeds. The other case is that the timer does not receive the LACPDU packet before the timer expires. And enter the normal timeout judgment mode.

There is a reserved field in the LACPDU packet. In this field, the TLV format is used to place the message to be transmitted. In the embodiment of the present invention, an ignore timeout of 256 seconds (0xFF) is required before warm-reboot, and the warm-reboot is completed. Then send the end packet with type 0x02. The content contained in the LACPDU packet is shown in Table 1:

Table 1

The embodiment of the present invention can be implemented on the SONiC switch product at present, especially PortChannel is often used as the keepalive connection of MCLAG in the standard networking mode of the general data center, on the basis of using the embodiment of the present invention, the switch can have The benefit of short timeout also avoids the problem of warm-reboot, which can be used as a differentiating function from other manufacturers.

It should be pointed out that the steps in each embodiment of the above-mentioned method for avoiding LACP protocol overtime can be mutually interleaved, replaced, increased, and deleted. It should belong to the protection scope of the present invention, and should not limit the protection scope of the present invention to the embodiment.

Based on the above purpose, the second aspect of the embodiments of the present invention proposes a system for avoiding LACP protocol timeout. As shown in Figure 2, the system 200 includes the following modules: an identification module, configured to respond to the restart of the port channel management of the sending end, check whether there is a warm-reboot identifier in the database, and respond to the warm-reboot identifier in the database. The receiving end sends the LACPDU packet; the confirmation module is configured to confirm whether the predetermined field in the LACPDU packet is zero in response to the receiving end receiving the LACPDU packet; the setting module is configured to respond to the predetermined field in the LACPDU packet Not zero, set the timer according to the number of seconds required for warm-reboot to run, and set the LACP state machine to ignore the LACP timeout flag and continue to wait for the LACPDU packet; and the release module, configured to respond to the release sent by the sender When the packet or timer expires and the LACPDU packet has not been received yet, the flag of ignoring the LACP timeout is released and enters the normal timeout judgment mode.

In some embodiments, the system further includes an interrupt module configured to: write the warm-reboot identifier in the database of the sending end, and send an interrupt signal to each process by using a custom signal representing warm-reboot.

In some embodiments, the system further includes a request module configured to: send a request to the LACP operator in response to the signal processor receiving a custom signal representing warm-reboot, and the LACP operator sends three requests to the port under the port channel LACPDU packet, and continue to execute the interrupt program.

In some embodiments, the system further includes a conversion module configured to: respond to the predetermined field in the LACPDU packet being zero, and enter a normal timeout determination mode in the LACP state machine.

Based on the above purpose, a third aspect of the embodiments of the present invention proposes a computer device, including: at least one processor; and a memory, the memory stores computer instructions that can run on the processor, and the instructions are executed by the processor to The following steps are implemented: S1, in response to the port channel management restart of the sending end, check whether there is a warm-reboot identifier in the database, and send an LACPDU packet to the receiving end in response to the presence of a warm-reboot identifier in the database; S2, responding to the receiving end Receive the LACPDU packet, confirm whether the predetermined field in the LACPDU packet is zero; S3, in response to the predetermined field in the LACPDU packet is not zero, set the timer according to the number of seconds required for warm-reboot operation, and set The LACP state machine ignores the LACP timeout mark and continues to wait for the LACPDU packet; and S4, in response to receiving the release packet sent by the sender or the timer not receiving the LACPDU packet when the timer expires, canceling the LACP timeout mark and entering normal Timeout judgment mode.

In some embodiments, the step further includes: writing the warm-reboot identifier in the database of the sending end, and sending an interrupt signal to each process by using a custom signal representing warm-reboot.

In some embodiments, the steps further include: in response to the signal processor receiving a custom signal representing warm-reboot, sending a request to the LACP operator, and the LACP operator sends the LACPDU packet three times to the port under the port channel, and continues to execute Interrupt program.

In some embodiments, the step further includes: in response to the predetermined field in the LACPDU packet being zero, entering a normal timeout determination mode in the LACP state machine.

As shown in FIG. 3 , it is a schematic diagram of the hardware structure of an embodiment of the computer device for avoiding LACP protocol timeout provided by the present invention.

Taking the device shown in FIG. 3 as an example, the device includes a processor 301 and a memory 302 .

The processor 301 and the memory 302 may be connected through a bus or in other ways, and the connection through a bus is taken as an example in FIG. 3 .

The memory 302, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs and modules, such as the corresponding method for avoiding LACP protocol timeout in the embodiment of the present application program instructions/modules. The processor 301 executes various functional applications and data processing of the server by running non-volatile software programs, instructions and modules stored in the memory 302 , that is, implements a method for avoiding LACP protocol timeout.

The memory 302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created by using a method for avoiding LACP protocol overtime, etc. . In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 302 may optionally include memory that is remotely located relative to the processor 301, and these remote memories may be connected to the local module through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

One or more computer instructions 303 corresponding to the method for avoiding LACP protocol timeout are stored in the memory 302, and when executed by the processor 301, execute the method for avoiding LACP protocol timeout in any of the above method embodiments.

Any one embodiment of the computer device implementing the above-mentioned method for avoiding LACP protocol timeout can achieve the same or similar effects as any of the above-mentioned method embodiments corresponding thereto.

The present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program for executing the method for avoiding LACP protocol timeout when executed by a processor.

As shown in FIG. 4 , it is a schematic diagram of an embodiment of the computer storage medium for avoiding LACP protocol timeout provided by the present invention. Taking the computer storage medium shown in FIG. 4 as an example, the computer readable storage medium 401 stores a computer program 402 for executing the above method when executed by a processor.

Finally, it should be noted that those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware to complete, and the program of the method for avoiding LACP protocol timeout can be stored in a computer. When the program is read from the storage medium, when executed, it may include the procedures of the embodiments of the above-mentioned methods. Wherein, the storage medium of the program may be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), and the like. The foregoing computer program embodiments can achieve the same or similar effects as any of the foregoing method embodiments corresponding thereto.

The above are the exemplary embodiments disclosed in the present invention, but it should be noted that various changes and modifications can be made without departing from the scope of the disclosed embodiments of the present invention defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in an individual form, they may also be understood as a plurality unless explicitly limited to a singular number.

It should be understood that as used herein, the singular form "a" and "an" are intended to include the plural forms as well, unless the context clearly supports an exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.

The serial numbers of the embodiments disclosed in the above-mentioned embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above-mentioned embodiments can be completed by hardware, or can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. The above-mentioned The storage medium may be a read-only memory, a magnetic disk or an optical disk, and the like.

Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is exemplary only, and is not intended to imply that the scope (including claims) disclosed by the embodiments of the present invention is limited to these examples; under the idea of the embodiments of the present invention , the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the above embodiments of the present invention, which are not provided in details for the sake of brevity. Therefore, within the spirit and principle of the embodiments of the present invention, any omissions, modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the embodiments of the present invention.

Claims (6)

1. A method for avoiding LACP protocol overtime, is characterized in that, comprises the steps: In response to the restart of the port channel management of the sending end, check whether there is a warm-reboot identifier in the database, and send an LACPDU packet to the receiving end in response to the existence of the warm-reboot identifier in the database; In response to receiving the LACPDU packet at the receiving end, confirm whether the predetermined field in the LACPDU packet is zero; In response to the predetermined field in the LACPDU packet being not zero, a timer is set according to the number of seconds required for warm-reboot operation, and the LACP state machine is set to ignore the LACP timeout flag and continue to wait for the LACPDU packet; and In response to receiving the release packet sent by the sending end or the timer has not received the LACPDU packet when the timer expires, remove the flag of ignoring the LACP timeout and enter the normal timeout judgment mode, Methods also include: Write the warm-reboot identifier in the database of the sending end, and use a custom signal representing warm-reboot to send an interrupt signal to each process, In response to the predetermined field in the LACPDU packet being zero, the LACP state machine enters a normal timeout judgment mode. 2. The method according to claim 1, characterized in that the method further comprises: In response to the signal processor receiving a custom signal representing warm-reboot, it sends a request to the LACP operator, and the LACP operator sends LACPDU packets three times to the port under the port channel, and continues to execute the interrupt program. 3. A system for avoiding LACP protocol overtime, characterized in that, comprising: The identification module is configured to respond to the restart of the port channel management of the sending end, check whether there is a warm-reboot identification in the database, and send an LACPDU packet to the receiving end in response to the existence of the warm-reboot identification in the database; A confirmation module, configured to confirm whether the predetermined field in the LACPDU packet is zero in response to the receiving end receiving the LACPDU packet; The setting module is configured to respond to the predetermined field in the LACPDU packet being non-zero, setting a timer according to the number of seconds required for warm-reboot operation, and setting the LACP state machine to ignore the LACP timeout flag and continue to wait for the LACPDU packet; and The release module is configured to respond to receiving the release packet sent by the sender or when the timer expires and has not received the LACPDU packet, release the flag of ignoring the LACP timeout and enter the normal timeout judgment mode, The system also includes an interrupt module configured to: write the warm-reboot identifier in the database of the sending end, and use a custom signal representing warm-reboot to send an interrupt signal to each process, The system also includes a conversion module configured to: respond to the predetermined field in the LACPDU packet being zero, enter a normal timeout judgment mode in the LACP state machine. 4. The system according to claim 3, wherein the system also includes a request module configured to: In response to the signal processor receiving a custom signal representing warm-reboot, it sends a request to the LACP operator, and the LACP operator sends LACPDU packets three times to the port under the port channel, and continues to execute the interrupt program. 5. A computer device, comprising: at least one processor; and A memory, the memory stores computer instructions operable on the processor, and when the instructions are executed by the processor, the steps of the method according to any one of claims 1-2 are implemented. 6. A computer-readable storage medium, the computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, the steps of the method according to any one of claims 1-2 are implemented.