Which option accurately describes the OSPF Graceful Restart feature in Cisco NX-OS?

Which option accurately describes the OSPF Graceful Restart feature in Cisco NX-OS?

A. keeps the plane state active during an OSPF process restart

B. shuts down the OSPF process gracefully to replace the router

C. prevents the OSPF process from restarting when the process crashes

D. allows a router to remain in the data forwarding path during an OSPF process restart

View Answer

Answer: D

Explanation:

A graceful restart, or nonstop forwarding (NSF), allows OSPFv2 to remain in the data forwarding path through a process restart. When OSPFv2 needs to perform a graceful restart, it sends a link-local opaque (type 9) LSA, called a grace LSA. Reference: https://networklessons.com/cisco/ccie-routing-switching-written/ospf-graceful-restart/