| 摘要 |
The present invention provides a protection of TESI over Adjacent Segment Protection Domain without Forwarding Ambiguity using Segment Protection Groups. In one embodiment, this is accomplished by identifying a network topology including at least one protection infrastructure segment for each work infrastructure segment, such that the work infrastructure segment and the corresponding protection infrastructure segment terminate on the same nodes, called segment-end nodes, wherein the two protection infrastructure segments pass through at least one bridge node, called a co-joint node, monitoring for failure in the work and protection infrastructure segment in the network, defining Segment Protection Group (SPG) for each work infrastructure segment including work infrastructure segment rooted at the co-joint node, wherein the SPG is formed by a set of work infrastructure segment and the protection infrastructure segments, switching Traffic Engineered Service Instance (TESI) over high priority protection infrastructure segment, and provisioning two SPG of co-joint node to prevent infrastructure segment from forwarding ambiguity and retracing of the TESI. |
