Refer to the exhibit. During a vPC peer switch reload, there is packet loss between the server and the router. Which action must be taken to prevent this behavior during future reloads?

A. Set the routed uplink ports of the Cisco Nexus peers as orphans.

B. Increase the vPC delay restore timer.

C. Disable vPC ARP synchronize on the vPC peers.

D. Decrease the OSPF hello and dead interval timers.








 

Suggested Answer: B

After a vPC peer device reloads and comes back up, the routing protocol needs time to reconverge. The recovering vPCs leg may black-hole routed traffic from access to aggregation/core until uplink Layer 3 connectivity is re-established. vPC Delay Restore feature delays vPCs leg bring-up on the recovering vPC peer device. vPC Delay Restore allows for Layer 3 routing protocols to converge before allowing any traffic on vPC leg. This results in a more graceful restoration and zero packet loss during the recovery phase (traffic still gets diverted on the alive vPC peer device). This feature is enabled by default with a vPC restoration default timer of 30 seconds. The timer can be tuned according to a specific Layer
3 convergence baseline from 1 to 3600 seconds.
Reference:
https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/nx-os-software/212589-understanding-vpc-election-process.html

This question is in 350-601 DCCOR exam 
For getting CCNP Data Center Certificate


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