When you create a downlink port on a tier-1 logical router, the port serves as a default gateway for the VMs that are in the same subnet.


Verify that a tier-1 logical router is configured. See Create a Tier-1 Logical Router.


  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. Click the name of a router.
  4. Click the Configuration tab and select Router Ports.
  5. Click Add.
  6. Enter a name for the router port and optionally a description.
  7. In the Type field, select Downlink.
  8. For URPF Mode, select Strict or None.
    URPF (unicast Reverse Path Forwarding) is a security feature.
  9. (Optional) Select a logical switch.
  10. Select whether this attachment creates a switch port or updates an existing switch port.
    If the attachment is for an existing switch port, select the port from the drop-down menu.
  11. Enter the router port IP address in CIDR notation.
    For example, the IP address can be
  12. (Optional) Select a DHCP relay service.
  13. Click Add.

What to do next

Enable route advertisement to provide North-South connectivity between VMs and external physical networks or between different tier-1 logical routers that are connected to the same tier-0 logical router. See Configure Route Advertisement on a Tier-1 Logical Router.