Which type of EIGRP route entry describes a feasible successor?

The correct answer is C. A backup route, stored in the topology table. In EIGRP, a feasible successor is (C) a backup route stored in the topology table. It is a neighbor that has a feasible distance to the destination that satisfies the feasibility condition (its reported distance is less than the current successor's feasible distance), making it…

Implement an EIGRP Based Solution

Question

Which type of EIGRP route entry describes a feasible successor?

Options

AA backup route, stored in the routing table
BA primary route, stored in the routing table
CA backup route, stored in the topology table
DA primary route, stored in the topology table

How the community answered

(23 responses)

A
9% (2)
B
4% (1)
C
87% (20)

Explanation

In EIGRP, a feasible successor is (C) a backup route stored in the topology table. It is a neighbor that has a feasible distance to the destination that satisfies the feasibility condition (its reported distance is less than the current successor's feasible distance), making it a loop-free backup path. The feasible successor is NOT placed in the routing table unless the primary route (successor) fails - at which point it is immediately promoted without requiring a new DUAL computation. The successor (primary route) is stored in both the topology table and the routing table, distinguishing it from the feasible successor.

Topics

#EIGRP feasible successor#topology table#backup route#DUAL algorithm

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