A final important note about path calculation in EIGRP…
The feasibility condition is the relationship between a Reported Distance and the Feasible Distance.
In other words, if a given path has a Reported Distance that is greater that the Successor path cost (Feasible Distance), it does not become a Feasible Successor.
That does not necessarily mean there is a routing loop. It just means it will not be considered a candidate for insertion into the routing table. (Non-Successor)
Stuck-in-Active: Journal of an IT-Network Administrator 