To add a hardware VTEP gateway to VMware NSX, the following prerequisites need to be satisfied:
- NSX Manager must be deployed and configured
- NSX Controllers must be deployed
- VXLAN must be configured in NSX using port 4789
Starting with NSX 6.2.3, VMware NSX uses VXLAN UDP port 4789 which is the standard VXLAN port number assigned by IANA. Prior to NSX 6.2.3, the port was 8472. If you upgrade to NSX 6.2.3, the old port number (8472) will continue to be used after the upgrade unless you take steps to change it. Changing the port number can be done through the vSphere Web Client UI or via a REST API call.
- VXLAN and VTEP must be configured on the Hardware VTEP gateway
- NSX controllers must be able to reach the hardware VTEP gateway ...