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.
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 100.64.0.0/16. Each tier-0-to-tier-1 peer connection is provided a /31 subnet within the 100.64.0.0/16 address space. Optionally, you can configure the address space in the tier-0
configuration.The following figure shows a sample topology.
Prerequisites
Verify that Manager mode is selected in the NSX Manager user interface. See NSX Manager. If you do not see the Policy and Manager mode buttons, see Configure User Interface Settings.
Procedure
What to do next
Verify that the tier-0 router is learning routes that are advertised by the tier-1 routers.