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?
A.
It routes all traffic that is addressed to the destination network to the interface indicated in the
routing table.
B.
It sends a copy of its neighbor table to all adjacent routers.
C.
It sends a multicast query packet to all adjacent neighbors requesting available routing paths to
the destination network.
D.
It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
When a router has no EIGRP feasible successor and the successor route to that destination network is in active status (the successor route is down, for example) a route recomputation occurs. A route recomputation commences with a router sending a query packet to all neighbors. Neighboring routers can either reply if they have feasible successors for the destination or optionally return a query indicating that they are performing a route recomputation.
When a route fails and has no feasible successor, EIGRP uses a distributed algorithm called Diffusing Update Algorithm (DUAL) to discover a replacement for a failed route. When a new route is found, DUAL adds it to the routing table
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query is first sent as multicast. if a neighbor don’t send ack router send the query as unicast. after 16 unicast but don’t acknowledged query the router think neighbor is down.
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D is wrong. OSPF sends hello packets
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