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Backup method and backup device of link status annunciation

A link status notification and backup device technology, applied in the field of communication, can solve problems such as traffic abnormality, LSA backup failure, and increase the complexity of the mainboard operation

Active Publication Date: 2013-01-16
紫光恒越技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are currently two processing methods when using OSPF NSR to back up LSA data. One is that the main board does not wait for the LSA backup confirmation message returned by the standby board to reply to the LSA ACK or perform LSA flooding. In this way, when the main board is backing up the LSA Abnormality will cause LSA backup failure. Therefore, when the standby board is converted to the main board, the LSA in the LSDB will be out of sync with the neighbor's LSA, resulting in abnormal traffic; second, the main board waits for the LSA backup confirmation message returned by the standby board. Reply LSA ACK or perform LSA flooding, which will cause the result of LSA backup to affect the operation of the main board, and the main board may need to restore the context of the backup message after receiving the LSA backup confirmation message. If the context changes, the main board will increase The running complexity of

Method used

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  • Backup method and backup device of link status annunciation

Examples

Experimental program
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Embodiment 1

[0098] see Figure 4The schematic flow chart of the specific embodiment 1 of the link state backup method of the present invention is shown, as shown in Figure 4 As shown, the process includes:

[0099] The main board generates LSA by itself, records flooding information, and sends the LSA to the standby board;

[0100] After the standby board stores the LSA sent by the main board, it replaces the main board to perform flooding processing on the LSA;

[0101] After receiving the confirmation response for the LSA returned by other devices, the main board clears the flooding information of the LSA stored locally, and forwards the confirmation response to the standby board, and the standby board ends the flooding of the LSA after receiving the confirmation response pan-processing process.

[0102] Therefore, when the backup board is storing LSAs, the main board is abnormal, causing the LSA backup to fail. The LSA information also ensures that the LSDB is correct, thereby avo...

Embodiment 2

[0106] Figure 5 It is a schematic flow diagram of the second embodiment of the link state backup method of the present invention, such as Figure 5 As shown, the process includes:

[0107] After the main board receives the LSA sent by other devices, it sends the LSA to the standby board;

[0108] After storing the LSA sent by the main board, the standby board replaces the main board and returns an acknowledgment response to the second LSA to the neighbor device.

[0109] Therefore, when the standby board stores LSAs, an exception occurs on the main board, resulting in LSA backup failure. After the standby board is converted to the main board, it receives LSAs sent by other devices, which ensures that the LSDB is correct, thereby avoiding problems caused by LSA backup failures.

[0110] It should be noted that, in this embodiment, when an exception occurs after the standby board successfully stores the LSA, the main board returns an acknowledgment response to the second LSA ...

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PUM

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Abstract

The invention discloses a backup method of link status annunciation. The backup method comprises that a reserved board receives a first level shift amplifier (LSA) generated and sent by a main board, wherein the first LSA is sent after the main board records flooding information of the first LSA, and the flooding information is used for indicating that the first LSA is in a flooding state; the reserved board stores the received first LSA; and the reserved board replaces the main boar to conduct flooding treatment on the first LSA after storing the received first LSA to enable the main board to remove locally-stored flooding information of the first LSA after receiving confirmation responses aiming at the first LSA and returned from a neighbor device. The invention discloses a backup device. By means of the backup method and the backup device, when LSA backup is carried out, LSA desynchronized problems caused by LSA backup failures can be avoided, operation complexity of the main board can be reduced, LSA backup efficiency is improved, and load sharing can be achieved.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a backup method and device for link state notification. Background technique [0002] The emergence of new network services such as voice and video puts forward stricter requirements for traffic interruption time. Many operators expect the traffic interruption time caused by network failure to be controlled within 50ms or even lower. This requirement is quickly converged through traditional routing protocols. It has been completely impossible to achieve. In order to further improve system reliability and ensure that network forwarding is interrupted as little as possible or even uninterrupted when the system fails, a distributed device with dual master controls is generally used to solve this problem, that is, two master control boards are configured on the distributed device, of which The main board (active main control board) is responsible for running nor...

Claims

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Application Information

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IPC IPC(8): H04L12/24
Inventor 乔会来胡闽罗国兵廖俊云
Owner 紫光恒越技术有限公司
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