Patent ID: 8971332
Filing Date: 2015-03-03
Classification: H04L

Abstract:
1. A method of exchanging routing information across a link state protocol controlled Ethernet network between Virtual Routing and Forwarding tables (VRFs) associated with an IP VPN, the method comprising the steps of: implementing a link state routing protocol in a control plane on an Ethernet network, the link state routing protocol being implemented in the control plane to enable the nodes on the Ethernet network to exchange link state advertisements containing information about node adjacencies and link states of the Ethernet network, and to enable the nodes on the Ethernet network to build link state databases containing synchronized views of the topology of the link state protocol controlled Ethernet network and to control the installation of forwarding state at the Ethernet nodes; implementing a first VRF relating to an IP VPN on a first of the nodes; implementing a second VRF relating to the IP VPN on a second of the nodes; and using the link state advertisements of the link state routing protocol to implement an exchange of VPN network layer reachability information between the first VRF and second VRF.