Patent ID: 8174967
Filing Date: 2012-05-08
Classification: H04L

Abstract:
1. In a multiprotocol label switching network comprising a provider edge router communicatively coupled to each of a pair of core routers of a core network, a method comprising: detecting at a first of the pair of core routers a link failure between the first of the pair of core routers and the provider edge router; and directing upstream traffic destined for the provider edge router from the first of the pair of core routers to the provider edge router via a second of the pair of core routers in response to the detected link failure, the first of the pair of core routers provisioned to direct the upstream traffic to the provider edge router via the second of the pair of core routers without knowledge of network topology in the core network based on a mapping table, the mapping table identifying the provider edge router as a directly connected edge router and identifying the second of the pair of core routers as a mated pair core router for the upstream traffic destined for the directly connected provider edge router.