When an EIGRP topology change is detected, what is the correct order of events when there is a
FS?
A.
The neighbor adjacency is deleted.
The feasible route is used.
DUAL is notified.
Remove all topology entries learned from that neighbor.
B.
DUAL is notified.
Remove all topology entries learned from that neighbor.
The neighbor adjacency is deleted.
Routes enter the Active state and the feasible route is used.
C.
The neighbor adjacency is deleted.
Routes enter the Active state and the feasible route is used.
DUAL is notified.
Remove all topology entries learned from that neighbor.
D.
DUAL is notified.
The neighbor adjacency is deleted.
Remove all topology entries learned from that neighbor.
The feasible route is used.
Explanation:
If a packet is not received before the expiration of the hold time, the neighbor adjacency is deleted,
and all topology table entries learned from that neighbor are removed, as if the neighbor had sent
an update stating that all the routes are unreachable. If the neighbor is a successor for any
destination networks, those networks are removed from the routing table, and alternative paths, if
available, are computed. This lets the routes quickly reconverge if an alternative feasible route is available.