Before migrating a user-defined topology, you must configure NSX-T.
Regarding the configuration of Edge clusters, VLAN transport zone, and segments used for tier-0 gateway uplinks, you have two options:
- Let the migration coordinator configure an Edge cluster, VLAN transport zone, and other layer-2 entities needed for northbound connectivity. Note that only one Edge cluster will be created.
- Manually configure Edge clusters, VLAN transport zone, and other layer-2 entities needed for northbound connectivity. You must use this option if you want more than one Edge cluster. For more information about creating an Edge cluster, see the section "Create an NSX Edge Cluster" in the NSX-T Data Center Installation Guide.
After the Edge cluster is ready, do the following:
- Create tier-0 and tier-1 gateways and configure dynamic or static routing on the tier-0 gateways towards the northbound routers. For dynamic routing, configure BGP or OSPF, route redistribution as well as any filtering or route-maps based on your requirements. For more information about configuring static or dynamic routing (BGP or OSPF), see the section "Tier-0 Gateways" in the NSX-T Data Center Administration Guide.
- After configuring the dynamic routing on tier-0 gateways, check that the dynamic routing has converged, that is, BGP sessions are established or OSPF neighborships are FULL as applicable.
Other than the configurations mentioned above, no other configurations should be performed.