You turn the standard tier-0 gateway into a cross-instance tier-0 gateway by connecting additional VCF instances to it. You configure uplink interfaces, BGP, and route redistribution for the additional instances.


  1. In a web browser, log in to Global Manager cluster at https://active_gm_vip_fqdn/.
  2. Add the additional instance as a location on the tier-0 gateway.
    1. On the NSX Manager main navigation bar, click Networking.
    2. In the navigation pane, select Tier-0 Gateways.
    3. On the Tier-0 Gateway page, click the vertical eclipses for the cross-instance_tier0 gateway and click Edit.
    4. Click Add Location and enter the required information.



      Location Enter the location name of instance being added.
      Edge Cluster Enter the Edge cluster name of instance being added.
      Mode Select Primary.
    5. Click Save.
  3. Set interfaces for the instance on the tier-0 gateway.
    1. Expand Interfaces and click Set.
    2. Click Add interface.
    3. Enter a name for the interface and select the instance location.
    4. Set the type to External and enter the IP address for the interface.
    5. Select the segment that the interface is connected to and the Edge node corresponding to the instance.
    6. Set the MTU to 9000.
    7. Repeat these steps to add three additional interfaces.
  4. Configure BGP neighbors.
    1. Expand BGP and under BGP Neighbors, click Set.

      You can enable BFD if the network supports it and is configured for BFD.

    1. Click Add BGP neighbor
    2. Enter the IP address for the neighbor and select the instance location.
    3. Enter the remote AS and source address for the neighbor.
    4. Set the Hold Down Time to 12 and Keep Alive Time to 4.
    5. Enter the password, click Save, and then click Close.
    6. Repeat these steps to add another BGP neighbor.
  5. Configure Route Re-Distribution
    1. Expand Route Re-Distribution and next to the location you are adding, click Set.
    2. In the Set Route Re-distribution dialog box, click Add Route-Redistribution.
    3. Enter default as name and, under Route re-distribution, click Set.
    4. In the Set route redistribution dialog box, select all listed sources and click Apply.
    5. Click Add to finish editing the default route redistribution and click Apply.
    6. Click Save
  6. Click Close editing.