BGP-Based Auto-Discovery for Layer-1 VPNs

The purpose of this document is to define a BGP-based auto-discoverymechanism for Layer-1 VPNs (L1VPNs). The auto-discovery mechanism forL1VPNs allows the provider network devices to dynamically discover theset of Provider Edges (PEs) having ports attached to Customer Edge(CE) members of the same VPN. That information is necessary forcompleting the signaling phase of L1VPN connections. One mainobjective of a L1VPN auto-discovery mechanism is to support the"single-end provisioning" model, where addition of a new port to agiven L1VPN would involve configuration changes only on the PE thathas this port and on the CE that is connected to the PE via this port.[STANDARDS-TRACK]