200-101 Question #26: Real Exam Question with Answer & Explanation

The correct answer is C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths. In EIGRP, when a successor route fails and there is no feasible successor (a pre-computed backup route meeting the feasibility condition), the route enters Active state. The router then sends EIGRP Query packets (multicast to 224.0.0.10) to all adjacent neighbors, asking if they

Implement an EIGRP Based Solution

Question

What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is in active status?

Options

AIt routes all traffic that is addressed to the destination network to the interface indicated in the routing table.
BIt sends a copy of its neighbor table to all adjacent routers.
CIt sends a multicast query packet to all adjacent neighbors requesting available routing paths

Explanation

In EIGRP, when a successor route fails and there is no feasible successor (a pre-computed backup route meeting the feasibility condition), the route enters Active state. The router then sends EIGRP Query packets (multicast to 224.0.0.10) to all adjacent neighbors, asking if they have an alternative path to the destination. Neighbors respond with EIGRP Reply packets. The router stays in Active state until all replies are received, after which it either installs a new successor or declares the route unreachable. The router does NOT continue forwarding traffic (A) or share its neighbor table (B) during this process.

Topics

#EIGRP DUAL#feasible successor#active route#query packet

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