You can add a loopback port to a tier-0 logical router.

The loopback port can be used for the following purposes:

  • Router ID for routing protocols
  • NAT
  • BFD
  • Source address for routing protocols


  1. From your browser, log in with admin privileges to an NSX Manager at https://nsx-manager-ip-address.
  2. Select Networking > Routing from the navigation panel.
  3. Select the tier-0 logical router.
  4. Select Configuration > Router Ports
  5. Click Add.
  6. Enter a name and optionally a description.
  7. Select the Loopback type.
  8. Select an edge transport node.
  9. Enter an IP address in CIDR format.


A new port is added for the tier-0 router.