This object reports the distance to the destination network as advertised to this router by the neighbor that originated or is reporting this topology entry. This is the distance value used in EIGRP's feasibility condition; a candidate successor is only usable as a backup, feasible successor if its reported distance is less than this router's own current feasibility distance, so an admin evaluating whether a given entry qualifies as a valid backup path checks this value against cEigrpFdistance. A neighbor advertising a reported distance higher than this router's own feasibility distance for the same destination would disqualify that neighbor as a feasible successor, meaning EIGRP would have to query for an alternate rather than instantly failing over to that particular neighbor.