Observe the exhibit.
 
If the command variance 3 were added to RTE, which path or paths would be chosen to route traffic to network X?

A. E-B-A

B. E-B-A and E-C-A

C. E-C-A and E-D-A

D. E-B-A, E-C-A and E-D-A








 

Suggested Answer: B

Advertised distance of RTD is greater than FD of RTE-RTC-RTA, so the route through D will not be used.
Please notice that routes must first satisfy the feasible condition to be considered for "variance" command:
The feasible condition states:
"To qualify as a feasible successor, a router must have an AD less than the FD of the current successor route".
In this case, the current successor route is E -> C -> A and the FD of this successor route is 20. But the AD of route E-D-A is 25 which is bigger than the FD of the successor route -> It will not be put into the routing table even if the "variance 3" command is used.

This question is in 300-101 Cisco Implementing Cisco IP Routing (ROUTE) Exam
For getting Cisco Certified Network Professional (CCNP) Routing and Switching Certificate




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