300-320 Question #347: Real Exam Question with Answer & Explanation

The correct answer is C: router eigrp 1. To migrate from Classic EIGRP to Named EIGRP without an outage, you first enter the existing classic EIGRP process using 'router eigrp 1' (matching the current AS number). From within that context, IOS allows a graceful in-place migration to the named-mode address-family structur

Question

Transition to Named EIGRP without causing an outage?

Options

Arouter eigrp NAME
Brouter eigrp 1 named NAME
Crouter eigrp 1
Dinterface fa0/1

Explanation

To migrate from Classic EIGRP to Named EIGRP without an outage, you first enter the existing classic EIGRP process using 'router eigrp 1' (matching the current AS number). From within that context, IOS allows a graceful in-place migration to the named-mode address-family structure. Jumping directly to 'router eigrp NAME' (option A) creates a brand-new named instance, which would drop adjacencies and cause an outage because both instances would compete for the same AS resources until the old one is removed.

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