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.”