The MPLS Topology Server performs the following steps to discover L3VPN topology:

  1. Probes the imported MPLS-relevant router and switch devices for L3VPN topology information and creates L3VPN objects and their relationships in its repository.

  2. Combines the information that is collected from the various probes to create additional L3VPN objects and relationships.

  3. Creates relationships that associate the discovered L3VPN objects with the discovered MPLS objects.

  4. Exports the L3VPN topology to the Global Manager.

  5. Exports a subset of the L3VPN topology to the MPLS Monitoring Server and the MPLS Analysis Server.