You must deploy sufficient NSX Edge resources to replace the Edge Services Gateways in the NSX for vSphere environment.
Number of Edge Nodes
If high availability is not configured, you need one Edge node to replace each Edge Services Gateway with a northbound connection outside of the NSX for vSphere environment. If high availability is configured, you need two Edge nodes.
You do not need to replace any Edge Services Gateways that are connected to a Distributed Logical Router to provide one-arm load balancer services, but are not providing routing services.
Size of Edge Nodes When Load Balancer Is Not Deployed
All NSX-T Edge nodes are added to the same Edge cluster. All nodes in an Edge cluster must be the same size.
If you do not have load balancers deployed, deploy Edge nodes to provide sufficient capacity to replace the current NSX for vSphere Edge Services Gateways.
If all Edge Services Gateways in your environment are the same size, you can figure out the correct size of NSX-T Edge node using this table.
|NSX for vSphere||NSX-T|
|Compact and Large||Small|
All Edge nodes must be of the same size so that they can be members of the same cluster. If there are different sizes of Edge Services Gateways in your environment, you must calculate the correct size to deploy. Calculate the total memory and vCPU resources required for all Edge Services Gateways in the environment, and then divide by the number of Edge nodes required for migration. Compare the calculated requirements to the NSX-T Edge size requirements to choose the correct size.
|Edge Services Gateway Size||Memory||vCPU|
|Quad Large||2 GB||4|
|Edge Node Size||Memory||vCPU|
Size of Edge Nodes When Load Balancer Is Deployed
If you have a load balancer deployed, you must deploy Edge nodes that have the sufficient resources for your configuration.
See "Scaling Load Balancer Resources" in the NSX-T Data Center Administration Guide.
All Edge nodes must be of the same size so that they can be members of the same cluster.