Patent ID: 8750099

Claim:
A method comprising: receiving, at an Autonomous System Border Router (ASBR), first Virtual Private Network (VPN) route information including a first route target assigned by a first routing device for a particular VPN site, a first route distinguisher assigned by the first routing device for a first route to the particular VPN site, and a first network prefix associated with the particular VPN site; receiving, at the ASBR, second VPN route information including a second route target assigned by a second routing device for the particular VPN site, a second route distinguisher assigned by the second routing device for a second route to the particular VPN site, and a second network prefix associated with the particular VPN site, wherein the second route distinguisher is different than the first route distinguisher and the second routing device is different than the first routing device; using the ASBR, comparing the first route target to the second route target, the first route distinguisher to the second route distinguisher, and the first network prefix to the second network prefix; and in response to determining that the first route target and the second route target are for the same particular VPN site, that the first route distinguisher and the second route distinguisher are different, and that the first network prefix matches the second network prefix, associating in a routing table of the ASBR the particular VPN site with a first path based on the first VPN route information and a second path based on the second VPN route information.