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.
- From your browser, log in with admin privileges to an NSX Manager at https://nsx-manager-ip-address.
- Select from the navigation panel.
- Click the name of a router.
- Click the Configuration tab and select Router Ports.
- Click Add.
- Enter a name for the router port and optionally a description.
- In the Type field, select Downlink.
- For URPF Mode, select Strict or None.
URPF (unicast Reverse Path Forwarding) is a security feature.
- (Optional) Select a logical switch.
- 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.
- Enter the router port IP address in CIDR notation.
For example, the IP address can be 172.16.10.1/24.
- (Optional) Select a DHCP relay service.
- 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.