Tier-0 logical routers have downlink ports to connect to NSX-T Data Center tier-1 logical routers and uplink ports to connect to external networks.

Prerequisites

  • Verify that at least one NSX Edge is installed. See the NSX-T Data Center Installation Guide
  • Verify that an NSX Edge cluster is configured. See the NSX-T Data Center Installation Guide.
  • Familiarize yourself with the networking topology of the tier-0 logical router. See Tier-0 Logical Router.

  • 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

  1. From your browser, log in with admin privileges to an NSX Manager at https://<nsx-manager-ip-address>.
  2. Select Networking > Tier-0 Logical Routers > Add.
  3. Enter a name for the tier-0 logical router.
  4. Select an existing NSX Edge cluster from the drop-down menu to back this tier-0 logical router.
  5. (Optional) Select a high-availability mode.
    By default, the active-active mode is used. In the active-active mode, traffic is load balanced across all members. In active-standby mode, all traffic is processed by an elected active member. If the active member fails, a new member is elected to be active.
  7. (Optional) Click the Advanced tab to enter a subnet for the intra-tier 0 transit subnet.
    This is the subnet that connects to the tier-0 services router to its distributed router. If you leave this blank, the default 169.0.0.0/28 subnet is used.
  8. (Optional) Click the Advanced tab to enter a subnet for the tier-0-tier-1 transit subnet.
    This is the subnet that connects the tier-0 router to any tier-1 routers that connect to this tier-0 router. If you leave this blank, 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.
  9. Click Save.
    The new tier-0 logical router appears as a link.
  10. (Optional) Click the tier-0 logical router link to review the summary.

What to do next

Attach tier-1 logical routers to this tier-0 logical router.

Configure the tier-0 logical router to connect it to a VLAN logical switch to create an uplink to an external network. See Connect a Tier-0 Logical Router to a VLAN Logical Switch for the NSX Edge Uplink in Manager Mode.