A customer migrates from a traditional Layer 2 data center network into a new SDN-based spine-and-leaf VXLAN EVPN data center within the same location The networks are joined to enable host migration at Layer 2 What is the final migration step after hosts have physically migrated to have traffic flowing through the new network without changing any host configuration?
A. Shut down legacy Layer 3 SVI
B. clear ARP caches on all hosts being migrated and then configure the legacy VRRP address onto new VXLAN core switches
C. Increase VRRP priorities on new infrastructure over legacy VRRP values, then shut down legacy SVIs
D. Shut down legacy infrastructure to allow VXLAN gateways to become active
E. Shut down legacy Layer 3 SVIs and activate new preconfigured Layer 3 SVIs on VXLAN