In methods and apparatus for acquiring VPN reachability information at a node of a data network, a VPN reachability information request is transmitted from a requesting node. The VPN reachability information request comprises a VPN identifier. Other nodes of the data network receive the VPN reachability...http://www.google.fr/patents/US7296090?utm_source=gb-gplus-shareBrevet US7296090 - Distribution of reachability information in data virtual private networks
Distribution of reachability information in data virtual private networks
