EIGRP Topology

The show ip eigrp topology all-links command will display all possible paths to the destination. In addition to the successor and feasible successor routes, the topology table may also contain non-successor routes. A non-successor route is a route that does not satisfy the feasibility condition. The output shows the route to the network now with three possible paths. The path via next hop has a reported distance of 256000000, which is greater than the feasible distance for the route 409600. Since the feasibility condition is not satisfied, the path via will not be a candidate for the successor role. When the router stays without routes that satisfy the FC, and a new path calculation for the prefix must be performed, the route will transit into the active state and the router will start querying neighbors for alternative routes.

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