300-620 Exam Dumps : Implementing Cisco Application Centric Infrastructure (300-620 DCACI)

To migrate the gateway address out of the ACI fabric for an endpoint group (EPG), the bridge domain configuration must ensure that routing is contained within the ACI fabric and that ARP requests are managed efficiently. The correct configuration set is:

L2 Unknown Unicast: Set to Hardware Proxy. This setting allows the ACI fabric to use the spine proxy function to handle unknown unicast traffic, which helps to reduce flooding within the fabric.

Unicast Routing: Set to Disabled. Since the gateway is being migrated out of the ACI fabric, unicast routing should be disabled to prevent the ACI fabric from attempting to route traffic for the EPG.

ARP Flooding: Set to Enabled. This allows ARP requests to be flooded within the bridge domain, which is necessary when the unicast routing is disabled, to ensure that ARP requests can still be resolved.

References :=

Cisco ACI Bridge Domain Configuration Guide

Cisco ACI Best Practices Guide

The import mode that must be used to ensure that the import process terminates if the imported configuration is incompatible with the existing system is the ‘atomic’ mode. This mode ignores shards that contain objects that cannot be imported while proceeding with shards that can be imported. If the incoming configuration’s version is incompatible with the existing system, the import process will terminate2.

To reduce instability during the migration of a legacy environment to Cisco ACI, the feature that should be enabled in the bridge domain is to Set Multi-Destination Flooding to Flood in BD (Option A). This setting allows unknown multicast, broadcast, and unknown unicast traffic to be flooded within the bridge domain, which can help prevent traffic loss during the migration process.