Orhan Ergun 3 Comments

EIGRP Feasible Successor

One of the advantages of EIGRP Feasible Successor is that it speeds up the EIGRP. In fact, if there is a Feasible Successor in the EIGRP network, such network converges faster than OSPF or IS-IS.

But what is EIGRP Feasible Successor and how can we find EIGRP Feasible Successor?

Or, if there is EIGRP Feasible Successor, how does EIGRP converges faster than OSPF or ISIS?

In this post, I will explain the answers to the above questions.

EIGRP Feasible Successor is a backup node that can satisfy the EIGRP feasibility condition.

Feasibility condition simply means that the backup router should be loop-free.

Let’s examine the topology shown below (Figure-1) to understand how EIGRP finds loop-free alternate/backup node.
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Orhan Ergun No Comments

EIGRP Hub and Spoke Design

EIGRP Hub and Spoke – EIGRP is the best protocol in Hub and Spoke topologies because of many reasons. In this article, I will explain the design consideration for EIGRP in a Hub and Spoke topology, also known as star topologies.


eigrp hub and spoke

Figure – 1 EIGRP Hub and Spoke

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