Which solution addresses this issue if the upstream router does not understand graceful restart messaging?

Refer to the exhibit.

A network engineer must improve the current IS-IS environment. The Catalyst switch is equipped with dual supervisors. Each time a stateful switchover occurs, the network experiences unnecessary route recomputation.

Which solution addresses this issue if the upstream router does not understand graceful restart messaging?
A . Enable IS-IS remote LFA FRR on both devices.
B. Enable NSR on the switch.
C. Enable NSF on the switch.
D. Configure ISIS aggressive timers on both devices.

View Answer

Answer: C