Patent ID: 8724456
Filing Date: 2014-05-13
Classification: G06F

Abstract:
1. A method comprising: storing a plurality of access link condition records with a first router that is a member of a first multi-homing set of a plurality of routers each connected to a first layer two (L2) network with a respective one of a plurality of first access links, wherein the first multi-homing set communicates with a second L2 network using a plurality of second access links to provide a first service to the first and second L2 networks, wherein each access link condition record comprises a state field that denotes whether a corresponding access link is operational with respect to the first service and a status field that denotes whether the corresponding access link is designated as active for transporting first service data traffic, wherein the plurality of access link condition records stored by the first router includes a corresponding access link condition record for each of the first access links and for each of the second access links; detecting, with the first router, a failure of a service link that connects the first and second L2 networks; and in response to detecting the failure, applying a path selection policy with the first router to select a data path between the first and second L2 networks for the first service data traffic and to cause one of the plurality of routers in the first multi-homing set to switch a status of at least one of the first access links or one of the second access links to active.