The MPLS Topology Server initiates a discovery whenever:

  • IP Availability Manager is added as a source to the MPLS Topology Server, as explained in Chapter 8, “Preparing and Initiating Discovery.”

  • IP Availability Manager completes a discovery cycle: an initial discovery, a full discovery, a pending discovery, or a single-device discovery.

    By subscribing to DiscoveredLastAt attribute updates on IP Availability Manager, the MPLS Topology Server becomes aware of discovery cycle completions in IP Availability Manager.

  • The MPLS Topology Server is restarted or communication is lost and then reestablished between the MPLS Topology Server and IP Availability Manager.

  • The MPLS Topology Server receives a manual discovery (Discover All) request, as explained in Chapter 10, “Using Full or Pending Discovery.”