Quick service switchover method and device

Abstract

An embodiment of the invention discloses a quick service switchover method and device and relates to the technical field of communication. The quick service switchover method and device can improve the network reliability and self-curing capability. The quick service switchover method comprises starting WTR (Wait To Restore) to time when an edge router in a home terminal IP (Internet Protocol) / MPLS (Multi-Protocol Label Switching) area determines an access which is formed by a home terminal main path and a main SDH link is recovered; generating into a first WTR state ID (Identity) according to a WTR state of the edge router in a home terminal IP / MPLS area and sending a first notification message to an edge router of an opposite terminal IP / MPLS; receiving a second notification message sent by the edge router of the opposite terminal IP / MPLS; detecting whether the first WTR state ID and a second WTR state ID are WTR ending IDs or not; switching from a home terminal backup path to a home terminal main path if the first WTR state ID and a second WTR state ID are WTR ending IDs. The quick service switchover method is applicable to quick service switchover scenes.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for quickly switching back services. Background technique [0002] With the development of network communication technology, services are continuously carried on sub-area networks in the form of CES (Circuit Emulation Service, circuit emulation service). [0003] CES can be applied to subregional IP (Internet Protocol, a protocol for interconnecting networks) / MPLS (Multi-Protocol Label Switching, multi-protocol label switching) and SDH (Synchronous Digital Hierarchy, synchronous digital system) hybrid networking. Wherein, in IP / MPLS, a PW (Pseudo Wire, pseudowire) is established as a main / standby path, and the IP / MPLS is connected through an SDH link. When a failure occurs in the area of ​​the main path (excluding the edge nodes of the area), or the SDH main link between the areas fails, or the link PE (Edge Router, edge router) node of the are...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when the main link between areas or the link PE node of the area fails, after the failure of the main path recovers, the timing of the WTR (Wait to Restore) of PEs in different areas is different or the timing is different. The starting point is different, so that the time point when CES starts to switch back is different. The party whose WTR ends first will switch back to the main path, while the other party’s WTR has not yet ended, and CES is still on the backup path. Only when the other party’s WTR ends and CES After switching back to the main path, the CES can be restored again, but the time interval between the time points when the CESs in the two regions start switching back may be much longer than the specified time of switching back, resulting in a long period of temporary data transmission of the CES. During the long period of temporary interruption of CES data transmission, data transmission cannot be realized, thus reducing the reliability and self-healing ability of the network

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