Fault recovery method and system

Abstract

The invention discloses a fault recovery method and system, and relates to the technical field of communication. The fault recovery method comprises the following steps: receiving a first loop calculation result of a first looped network protection protocol; based on the first loop calculation result, maintaining the port states of the forwarding port and all associated blocked ports in the protection link group table, and issuing port settings; receiving a link fault detection result, modifying the forwarding port of a fault link and port states of all associated blocked ports in the protection link group table, and issuing port settings; synchronizing a forwarding link fault detection result to recalculate according to the first ring network protection protocol; and updating the protection link group table based on the recalculation result. The fault recovery method and system are combined with a hardware link state detection technology, when a link fault is detected, link protectionswitching is rapidly carried out, and packet loss caused by long-time service protection switching after calculation of an existing link protection protocol is avoided.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a failure recovery method and system. Background technique [0002] In order to perform link backup and improve network reliability in an Ethernet switching network, redundant links are usually used. However, the use of redundant links will cause loops on the switching network, causing broadcast storms and instability of the Media Access Control (MAC) address table, resulting in poor user communication quality and even communication interruption. [0003] In order to solve the loop problem in the switching network, many ring network protection protocols to prevent loops have been proposed, such as Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP), Multiple Spanning Tree Protocol (Multiple Spanning Tree Protocol, MSTP) and G8032, among which the G.8032 protocol is a standard protocol for the Ethernet link layer defined by the International Telecommunicatio...

AI Technical Summary

Problems solved by technology

After the switching network status is stable, if the active forwarding port fails, the ring network protection protocol needs to be recalculated and the blocked port should be restored to the normal state for service forwarding, thereby activating the redundant link and restoring the switching network connectivity. Fault recovery, the above process takes a certain amount of time

[0005] At present, the requirements for the fault recovery time of the Layer 2 Ethernet are getting higher and higher, and the ring network protection protocol cannot meet the convergence performance requirements of the link. Or 100M bandwidth link capability, the loss of data packets is about 100 or 1000

But in fact, as the bandwidth capacity of physical links increases, for example, for 10G or 100G bandwidth links, the number of lost packets can reach 100,000 or 1 million, and the recovery time of 50ms will cause serious service failures, which will undoubtedly affect business impact

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