EIGRP Terminologies

Feasible SuccessorA route that satisfies a feasibility condition and is kept as a backup route. The condition is that the backup route is loop free.
Feasibility ConditionThe condition that for a route to be considered a backup route, the reported distance received must be less than the feasible distance calculated locally.
Reported Distance (RD)The distance reported by a router to reach a prefix. The reported distance received by a router is the feasible distance observed locally at the remote router.
Feasible Distance (FD)The value for the lowest-metric path to reach the destination prefix.
SuccessorThe first next-hop router to reach a prefix.
Successor RouteThe route with the lowest metric to reach a destination prefix
Common terms found whilst working with EIGRP



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