Feasible successor - A destination entry is moved from the topology table to the routing table when there is a feasible successor. A feasible successor is a path whose reported distance is less than the feasible distance, and it is considered a backup route.

EIGRP will keep up to six feasible successors in the topology table. Only the one with the best metric (the successor) is placed in the routing table. The show ip eigrp topology command will display all the EIGRP feasible successor routes known to a router.