Redundancy for Virtual Private Network (VPN) service with an Ethernet access network is provided by a full-mesh of dedicated pseudowires connected among the network-facing provider edge (n-PE) devices, each of which is associated with the same Ethernet access network. A provider Bridge Protocol Data...http://www.google.se/patents/US7715310?utm_source=gb-gplus-sharePatent US7715310 - L2VPN redundancy with ethernet access domain
