What does feasibility condition in EIGRP require to be satisfied?

What does feasibility condition in EIGRP require to be satisfied?

The Feasibility Condition states that a route will not be accepted if the Reported Distance is more than the best path’s Feasible Distance. Or said another way and from the perspective of the router: a path to a network will not be accepted if my neighbor’s cost is more than my cost.

How does EIGRP determine feasible successor?

A successor route for any given destination is chosen as having the lowest computed feasible distance; that is, the lowest sum of reported distance plus the cost to get to the advertising router.

How does EIGRP calculate feasible distance?

feasible distance: Best metric among all path to a network. It is calculated by adding the advertised/reported distance advertised by the neighbor and the cost calculated by that current router to reach the neighbor. successor: It is the (lowest) best path to reach to any specific destination network.

Which EIGRP route entry describes a feasible successor?

Question: Which type of EIGRP route entry describes a feasible successor? Explanation: EIGRP uses the Neighbor Table to list adjacent routers. The Topology Table list all the learned routers to destination whilst the Routing Table contains the best route to a destination, which is known as the Successor.

What is FD in EIGRP?

The Feasible Distance (FD) is the distance from the current router to the destination router. Feasibility Condition (Requirement) Within EIGRP there is requirement which must be met for a route to be considered feasible and loop-free.

What are the 4 conditions for 2 routers to form a Neighborship in EIGRP?

Two routers must use same K Values in order to become the EIGPR neighbor. For example if one router is using three K- Values (K1, K2 and K3) while second router is using default K values (K1 and K3) then these two routers will never become neighbor. In order to become EIGRP neighbor two routers must use same K values.

What is the purpose of EIGRP?

Enhanced Interior Gateway Routing Protocol (EIGRP) is an advanced distance-vector routing protocol that is used on a computer network for automating routing decisions and configuration. The protocol was designed by Cisco Systems as a proprietary protocol, available only on Cisco routers.

What is EIGRP topology?

The topology table is where EIGRP stores the information for up to six alternate routes to a particular network. The backup routes are called feasible successors. The feasible successors stored in the topology table are what makes it possible for EIGRP to converge rapidly or even instantly.

What is the feasibility condition of EIGRP R3?

As said above, the Feasibility Condition states that a route will not be accepted if the Reported Distance is more than the best path’s Feasible Distance. R3’s best path to 9.9.9.0/29 is through R4, since it has the lowest Feasible Distance of 2816. The route from R1 contained a Reported Distance of 5888.

Why is the alternate path not there in EIGRP?

When checking the topology table, the alternate path is not there because it does not conform the FC (feasibility condition). That’s the correct and expected behavior. Anyway, on this lab, it was intensionally configured to get this way. hehe…

What do you need to know about the feasibility condition?

To properly discuss the Feasibility Condition however, you must have an understanding of the following EIGRP terms: Successor, Feasible Successor, Reported Distance, and Feasible Distance. You will also want to understand the EIGRP Metric and how it is calculated. Luckily, each of these concepts were covered in other articles.

Why does R1 not advertise in EIGRP?

But in reality, R1 would not advertise this route due another loop prevention mechanism built into EIGRP. That loop prevention mechanism is known as Split Horizon. The Split Horizon rule states that a route will not be advertised out an interface that a better route to the same destination was received.