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Method and equipment for generating and distributing link state protocol data unit fragment messages

A link state protocol and data unit technology, applied in the field of communication, can solve problems such as route oscillation and increase the burden on neighboring devices, and achieve the effect of reducing transmission

Active Publication Date: 2013-06-12
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neighbor device that receives the LSP fragment message will also think that the LSP fragment message has changed, and will think that the route in the original LSP fragment message does not exist, and delete it; The message may cause the deleted routing information to be added again, which will cause routing flapping and increase the burden on neighboring devices.

Method used

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  • Method and equipment for generating and distributing link state protocol data unit fragment messages
  • Method and equipment for generating and distributing link state protocol data unit fragment messages
  • Method and equipment for generating and distributing link state protocol data unit fragment messages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , figure 1 It is a schematic flow chart of the method for generating and issuing LSP fragmented packets in Embodiment 1 of the present invention. The specific steps are:

[0025] Step 101, during the restart process of the active main control board of the device in the network, the standby main control board of the device acts as the current active main control board to obtain the TLV, and the TLV ID of each TLV and the LSP fragment number Correspondence.

[0026] When the active main control board of the device fails or needs to be upgraded, it will restart the active main control board. During the restart process of the active main control board, the standby main control board of the device will complete the link Restoration of roads and regeneration of routes.

[0027] In this embodiment, in order to prevent the same TLV from being included in different LSP fragment packets before and after the restart of the old master control board, it is necessary...

Embodiment 2

[0044] When the high-reliability backup mode configured on a network running the IS-IS protocol is NSR, the active main control board of the device will back up all link state information to the standby main control board. During the board restart process, the current master main control board completes link recovery and route regeneration according to the backup link state information.

[0045] Before the active main control board of the device restarts, the standby main control board of the device receives the TLV backed up by the active main control board, the correspondence between the TLV ID of each TLV and the LSP fragment number, and the LSP fragment message The refresh time and checksum of , and store.

[0046] see figure 2 , figure 2 It is a schematic flowchart of the method for generating and releasing LSP fragmented messages in Embodiment 2 of the present invention. The specific steps are:

[0047] Step 201 , during the restart process of the active main contr...

Embodiment 3

[0053] If the high-reliability backup mode configured on the network running the IS-IS protocol is the GR mode, the current active main control board of the device obtains the previous link status information from the neighbor device, and then Complete link recovery and route regeneration.

[0054] see image 3 , image 3 It is a schematic flow chart of the method for generating and issuing LSP fragmented messages in Embodiment 3 of the present invention. The specific steps are:

[0055] Step 301, during the restart process of the active main control board of the device, the standby main control board acts as the current active main control board, receives the LSP fragment message sent by the neighbor device, obtains the TLV from the received LSP fragment message, and The corresponding relationship between the TLV ID of each TLV and the LSP fragment number, and obtain the refresh time and checksum carried in each LSP fragment message.

[0056] When the refresh time is carr...

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Abstract

The invention discloses a method for generating and distributing link state protocol data unit fragment messages, which comprises the following steps of: taking a standby main control board as a current active main control board in the restart process of an active main control board of equipment, generating the LSP (Link State Packet) fragment messages according to recalculated route information as well as a relation between TLV ID (Threshold Limit Value Identification) and LSP fragment numbers before the restart of the existing active main control board and only sending to neighbor equipment if compared with LSP fragment messages before the restart of the existing active main control board, the generated LSP fragment messages are changed. The invention also provides the equipment; and after the restart of the existing active main control board of the equipment is finished, the sending of the unnecessary LSP fragment messages is omitted.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and device for generating and publishing link state protocol data unit fragmented messages. Background technique [0002] In order to improve the reliability of the network, we use multiple main control boards for backup. When the active main control board fails, the standby main control board takes over its work, thus ensuring that the intermediate system-to-intermediate system (Intermediate System-to-Intermediate System, IS-IS) routing protocol is not affected. [0003] The high-reliability backup methods adopted in the IS-IS routing protocol generally adopt the nonstop routing (Nonstop Routing, NSR) method and the graceful restart (Graceful Restart, GR) method. In the two methods, the transmission of the link state information, that is, the transmission of the link state database (Link State Database, LSDB), is by sending a link state protocol da...

Claims

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Application Information

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IPC IPC(8): H04L12/707H04L12/723H04L45/24H04L45/50
Inventor 郭英军曹伟晁军显
Owner NEW H3C TECH CO LTD
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