A protection switching method and device

Abstract

The present invention provides a protection switching method and equipment, the method comprising: when establishing protection switching between the head node and the tail node, adding all the tunnels between the head node and the tail node except the main tunnel to the tunnel backup group ; The head node implements protection switching for the service transmission between the head node and the tail node through the main tunnel and the standby tunnel selected from the tunnel backup group; when the failure of the main tunnel is detected, two tunnels are selected from the tunnel backup group to One of the two tunnels is used as a secondary main tunnel, and the other tunnel is used as a secondary backup tunnel, and protection switching is implemented for service transmission between the head node and the tail node through the secondary main tunnel and the secondary backup tunnel. The present invention can make full use of existing resources.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a protection switching method and equipment. Background technique [0002] MPLS Transport Profile (MPLS TP) is a packet-switching, connection-oriented multi-service transport technology, which can not only better carry carrier-class Ethernet services, but also take into account traditional TDM and ATM services , can also support IP / MPLS service transmission, and meet the five basic attributes of standardized services, high reliability, flexible scalability, strict QOS and perfect OAM. [0003] MPLS TP supports end-to-end protection switching mechanisms, including 1:1 protection switching and 1+1 protection switching, among which, [0004] 1:1 protection switching is to provide two primary and secondary tunnels between the head node and the tail node of the tunnel. Under normal circumstances, data is transmitted on the primary tunnel; when the head node detec...

AI Technical Summary

Problems solved by technology

[0007] In practical applications, there are often more than two paths between the head node and the tail node, such as figure 1 In the MPLS TP network shown, there are actually four paths between PE1 and PE2: PE1-P1-PE2, PE1-P2-PE2, PE1-P3-PE2, and PE1-P4-PE2. However, according to the MPLS TP protection Switching mechanism, only two of the four paths can be selected for protection switching, and the other two paths cannot be used for protection switching

[0008] It can be seen from this that the protection switching mechanism supported by the existing MPLS TP cannot fully utilize the existing resources and cannot achieve a more stable effect. Similarly, other network environments that support the end-to-end protection switching mechanism also have such inadequacy. Problems with using existing resources

Images