| Exam 200-120 | Question id=144 | IP Routing Technologies |
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 there are no feasible successors, a route goes into Active state and a route re-computation occurs. A route re-computation 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 re-computation. While in Active state, a router cannot change the next-hop neighbor it is using to forward packets. Once all replies are received for a given query, the destination can transition to Passive state and a new successor can be selected. When a link to a neighbor that is the only feasible successor goes down, all routes through that neighbor commence a route re-computation and enter the Active state.