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Routing & Switching · Intermediate

Feasible Distance (FD)

The lowest total EIGRP metric from the local router to a destination, through the successor.

Definition

FD equals the neighbor's reported distance plus the cost of the link to that neighbor. It is the metric installed in the routing table and the threshold used in the feasibility condition.

Example

In 'via 10.1.1.2 (3072/2816)', 3072 is the FD through that neighbor.

Exam tip

FD is the first number in parentheses in show ip eigrp topology; RD is the second.

Related terms