LSP discovery

For a managed MPLS network that consists of Cisco and/or Juniper M/T devices, the MPLS Topology Server will discover every TE tunnel and every TE LSP in the network.

For a managed MPLS network that consists of Juniper M/T devices, the MPLS Topology Server will discover every P2MP LSP and every subLSP in the network.

The MPLS Topology Server will also discover every LDP LSP between any pair of PE devices in the network as long as at least one of those LSPs is used by a VPN to carry traffic. In contrast, if none of the LDP LSPs between a pair of PEs are used by a VPN, the MPLS Topology Server will not discover any of those LSPs.

The latter behavior prevents the discovery of LDP LSPs that are not being used by customers. Discovering just the VPN-associated LSPs not only saves computer resources but also leads to more meaningful service impact analysis.

For a managed MPLS network that consists of Huawei and/or Juniper ERX devices, the MPLS Topology Server will discover at most one bidirectional pair of VPN-related LDP LSPs for each pair of PE devices in the network.