Implementing Cisco ACI Advanced (DCACIA) — Question 79

What is the purpose of enabling ARP flooding when VMs are migrated from a pre-existing network to Cisco ACI and their gateways remain configured in the legacy setup?

Answer options

• A. to avoid endpoint flapping between the legacy network and the ACI fabric
• B. to prevent VMs from communicating with physical servers within the ACI fabric
• C. to allow communication between VMs and silent hosts
• D. to allow VMs to communicate with devices outside of their subnet

Correct answer: A

Explanation

Enabling ARP flooding helps to maintain stable communication by preventing endpoint flapping, which can occur when the VMs switch between their old network and the new ACI fabric. The other options do not accurately describe the role of ARP flooding; it does not prevent communication with physical servers, does not specifically facilitate communication with silent hosts, nor does it allow communication with devices outside of the subnet.