Backup method and backup device of link status annunciation

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...

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

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