suresh Understanding the Difference Between EIGRP Feasible Successor and Feasible Distance
When it comes to EIGRP (Enhanced Interior Gateway Routing Protocol), two key concepts to grasp are Feasible Successor and Feasible Distance. These play a crucial role in route computation and network efficiency.
Feasible Successor:
The focus keyword, EIGRP feasible successor, refers to a backup route to a particular destination network in EIGRP. A feasible successor is a neighboring router that has a backup path to the destination network which meets the feasibility condition. This means that the advertised distance of the feasible successor is less than the reported distance of the successor route, making it a valid alternative path in case of a network failure.
Feasible Distance:
On the other hand, EIGRP feasible distance is the metric associated with the best path to reach a particular network. It includes the sum of the outgoing interface's bandwidth and delay values along with any configured K values. Feasible distance is used to determine the best route to a destination network based on the lowest metric calculated.
In summary, while feasible distance represents the total metric of the primary route to a network, feasible successor serves as a backup route that meets the feasibility condition and can be used if the primary path fails.
Understanding these concepts is essential for optimizing network performance and ensuring reliable routing in EIGRP environments.
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