The Pending Elements list, which appears in the Discovery Progress window, shows devices for which the MPLS Topology Server could not successfully complete the discovery of MPLS, VPN, and BGP topology. The MPLS Topology Server attempts to discover the MPLS, VPN, and BGP topology that is associated with the devices on the Pending Elements list during the next scheduled pending discovery interval, or when a pending discovery is manually invoked.
“Pending discovery” on page 150 provides details about scheduled pending discovery, pending discovery interval, and pending discovery.
To view the Pending Elements list:
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Attach the Domain Manager Administration Console to the MPLS Topology Server.
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Select Topology > Show Discovery Progress.
Pending Elements list containing one pending element is an example of a Pending Elements list.
Figure 1. Pending Elements list containing one pending element 
