Network Protocol Manager for EIGRP creates a full adjacency between two peering EIGRP devices if both EIGRP protocol endpoints are discovered in the managed EIGRP topology. If only one EIGRP protocol endpoint is discovered in the managed EIGRP topology, Network Protocol Manager for EIGRP creates a stub adjacency between the two peering EIGRP devices. The presence of a gray router icon in an EIGRP Connectivity map indicates one or more stub adjacencies.
An EIGRP Connectivity map that shows two stub adjacencies shows two stub adjacencies, each of which is represented as a solid green line connected to a gray router icon. Green indicates that the stub adjacencies are healthy. The device that is represented by the gray router icon is not present in the repository of Network Protocol Manager for EIGRP.
Displaying stub adjacencies enables a service provider to show a subscriber the status of that subscriber’s adjacency from the provider’s perspective.