L2VPN discovery overview

For L2VPN discovery, the MPLS Topology Server component of MPLS Manager is able to discover and model the following MPLS Layer 2 VPN entities:

• LDP-signaled L2VPNs

  This L2VPN uses Label Distribution Protocol (LDP) signaling to set up and maintain the pseudowires between PE devices in an MPLS network.

• BGP-signaled L2VPNs

  This L2VPN uses Multiprotocol Border Gateway Protocol (MBGP) signaling to set up and maintain the pseudowires between PE devices in an MPLS network.

• VPWS

  Virtual private wire service, also known as point-to-point L2VPN, is a technology that uses a pseudowire to emulate a point-to-point circuit across an MPLS network.

• VPLS

  Virtual private LAN service, also known as point-to-multipoint L2VPN, is a technology that uses a full mesh of pseudowires to emulate a LAN across an MPLS network.

  The MPLS Topology Server requires a Level 2 VPN feature license for the discovery of VPWS and VPLS L2VPNs. The Smarts System Administration Guide provides information about licensing.