Patent ID: 9124511
Filing Date: 2015-09-01
Classification: H04L

Abstract:
1. A method, comprising: receiving, at a particular packet switching device, routing protocol advertisement information advertising a first Network Layer Reachability Information (NLRI) and advertising a second NLRI; wherein said routing protocol advertisement information of the first NLRI includes: the first NLRI, a first primary path and a route distinguisher correlation value, with the first primary path and the route distinguisher correlation value identified as being associated with the first NLRI; and wherein said routing protocol advertisement information of the second NLRI includes: second NLRI, a second primary path and the route distinguisher correlation value, with the second primary path and the route distinguisher correlation value identified as being associated with the second NLRI; wherein the first NLRI includes a distinguisher and a particular prefix, and the second NLRI includes a route distinguisher different than the first route distinguisher and the particular prefix; and determining a particular backup path from the particular packet switching device for the first NLRI, which includes considering the first NLRI and second NLRI to refer to the same destination based on both the first NLRI and the second NLRI being associated with the route distinguisher correlation value and including the particular prefix; wherein the particular backup path includes the second primary path.