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To prevent frequent MAC and IP address moves between different leaf switch ports, enabling rogue endpoint control is the recommended action. This feature helps in identifying and mitigating the movement of endpoints that could potentially cause loops or other issues within the network.

The group of settings required to meet the requirements for workload migration where servers will physically terminate at the Cisco ACI, but their gateway must stay in the existing network, is:

L2 Unknown Unicast: Flood

L3 Unknown Multicast Flooding: Flood

Multi Destination Flooding: Flood in BD

ARP Flooding: Enable5

These settings ensure that the bridge domain is configured to handle unknown unicast and multicast traffic appropriately, and ARP flooding is enabled to allow for the resolution of IP addresses when the gateway is outside the fabric5.

enter/aci/apic/sw/migration_guides/migrating_existing_networks_to_aci.html

 For a blade server that lacks support of bonding, the port channel mode that results in “route based on originating virtual port” on the VMware VDS is MAC Pinning-Physical-NIC-load (Option B). This mode ensures that the virtual machine traffic is distributed across the available uplinks based on the MAC address of the originating virtual port1.