System and Method for Restoration in a Multimedia IP Network

摘要

Disclosed herein are systems, methods, and computer readable media for modifying IP backbone link weights such that multicast traffic and unicast traffic will not travel on a same path between nodes. The method comprises assigning link weights to nodes within an IP backbone such that multicast forwarding paths and unicast forwarding paths are failure disjoint, and delivering undelivered multicast packets using IP unicast encapsulation to the loopback address of next hop router on a multicast tree upon link/interface failure.

主权项

1. A method comprising:
assigning weights to a first series of network links forming a first ring such that multicast forwarding paths and unicast forwarding paths are failure disjoint and wherein the assigning the weights results in the first series of network links having a high cost in a first direction around the first ring and a low cost in a second direction around the first ring; assigning weights to a second series of networks links forming a second ring such that weights in the first direction have a high cost and weights in the second direction have a low cost; and upon a network failure in one of the first ring and the second ring:
delivering multicast packets using internet protocol unicast encapsulation to a next hop router on a multicast tree; anddecapsulating received encapsulated unicast packets.