You can attach the tier-0 logical router to the tier-1 logical router so that the tier-1 logical router gets northbound and east-west network connectivity.

About this task

When you attach a tier-1 logical router to a tier-0 logical router, a router-link switch between the two routers is created. This switch is labeled as system-generated in the topology. The default address space assigned for these tier-0-to-tier-1 connections is 100.64.0.0/10. Each tier-0-to-tier-1 peer connection is provided a /31 subnet within the 100.64.0.0/10 address space. Optionally, you can configure the address space in the tier-0 Summary > Advanced configuration.

The following figure shows a sample topology.

Procedure

  1. From your browser, log in to an NSX Manager at https://nsx-manager-ip-address.
  2. Select Routing from the navigation panel.
  3. Select the tier-1 logical router.
  4. From the Summary tab, click Edit.
  5. Select the tier-0 logical router from the drop-down menu.
  6. (Optional) : Select an edge cluster from the drop-down menu.

    The tier-1 router needs to be backed by an edge device if the router is going to be used for services, such as NAT. If you do not select an edge cluster, the tier-1 router cannot perform NAT.

  7. Specify members and a preferred member.

    If you select an edge cluster and leave the members and preferred member fields blank, NSX-T sets the backing edge device from the specified cluster for you.

  8. Click Save.
  9. Click the Configuration tab of the tier-1 router to verify that a new point-to-point linked port IP address is created.

    For example, the IP address of the linked port can be 100.64.1.1/31.

  10. Select the tier-0 logical router from the navigation panel.
  11. Click the Configuration tab of the tier-0 router to verify that a new point-to-point linked port IP address is created.

    For example, the IP address of the linked port can be 100.64.1.1/31.

What to do next

Verify that the tier-0 router is learning routes that are advertised by the tier-1 routers.