300-620 DCACI: Implementing Cisco Application Centric Infrastructure

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QuestionQ40

ACI Packet Forwarding

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Refer to the exhibit. Server A connects to the Cisco ACI fabric through two teamed interfaces. One interface in the team is configured as active, while the other stays in standby mode. When a failover occurs and the standby interface becomes active, it sends traffic using its built-in MAC address. Which bridge-domain configuration must be applied to resolve this issue?

Explanation

ARP flooding must be enabled when a failover causes an IP address to be associated with a different MAC address. It floods gratuitous ARP messages through the bridge domain so peer hosts and routers can update their ARP caches with the new MAC-to-IP mapping.

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