This map shows IS-IS areas, IS-IS services, and the IS-IS adjacency connections between the IS-IS services. It also shows to which IS-IS area an IS-IS service belongs. No physical connectivity details are included in this map.
The layout of an ISIS Connectivity map depends on the object that you select to launch the map. The launching object for the map, called the focal object, is surrounded by a box unless the focal object is displayed in a container, or is an IS-IS adjacency object. Any node marked with a plus sign indicates that the node can be expanded to show all nodes that are physically or logically connected to the node.
In an ISIS Connectivity map, because an IS-IS device has only one area assignment, all IS-IS devices will appear inside containers. Standard IS-IS area icons do not appear in an ISIS Connectivity map.
Unlike an Enhanced Interior Gateway Routing Protocol (EIGRP) router or an Open Shortest Path First (OSPF) router, which can have multiple area (domain) assignments, an IS-IS router has only one area assignment.