What must be done on router A in order to make EIGRP work effectively in a Frame Relay multipoint environment?

You are a network technician, study the exhibit carefully.

What must be done on router A in order to make EIGRP work effectively in a Frame Relay
multipoint environment?

A.
Issue the command bandwidth 56 on the physical interface.

B.
Issue the command bandwidth 56 on each subinterface.

C.
Issue the command bandwidth 224 on each subinterface.

D.
Issue the command bandwidth 224 on the physical interface.

Explanation:
In Frame Relay, all neighbors share the same bandwidth, regardless of the actual CIR of each
individual PVC. In this case the CIR of each PVC is the same so we can find the bandwidth of the

main interface (multipoint connection interface) by 56 x 4 = 224.
Notice that if the bandwidth on each PVC is not equal then we get the lowest bandwidth to
multiply.