Module 5

EIGRP and the Feasible Successor

A protocol that keeps a spare route verified in advance, and the one condition a spare must satisfy before it is allowed to be used.

5 activities~90 min

In this module

Distinguish reported distance from feasible distance
State the feasibility condition and explain what it prevents
Explain what variance means, while separating theory from the lab's unverified effect

EIGRP and the feasible successor

Two distances, one condition, and instant failover.

Bring up two EIGRP routers

The autonomous system number, and what happens when it differs.

Fix the middle router in a chain

Three routers, one of them not participating.

EIGRP multi-path

Two paths of different cost, and the feasibility condition before variance.

EIGRP variance

The multiplier, and what it cannot promote.

Each topic page lists every lesson, quiz and hands-on lab that covers it, plus how it maps onto the CCNA and Network+ blueprints.