A tier-1 gateway is typically connected to a tier-0 gateway in the northbound direction and to segments in the southbound direction.

Tier-0 and tier-1 gateways support the following addressing configurations for all interfaces (uplinks, service ports and downlinks) in both single tier and multi-tiered topologies:
  • IPv4 only
  • IPv6 only
  • Dual Stack - both IPv4 and IPv6
To use IPv6 or dual stack addressing, enable IPv4 and IPv6 as the L3 Forwarding Mode in Networking > Networking Settings > Global Networking Config .


  1. From your browser, log in with admin privileges to an NSX Manager at https://<nsx-manager-ip-address>.
  2. Select Networking > Tier-1 Gateways.
  3. Click Add Tier-1 Gateway.
  4. Enter a name for the gateway.
  5. (Optional) Select a tier-0 gateway to connect to this tier-1 gateway to create a multi-tier topology.
  6. Select a failover mode.
    Option Description
    Preemptive If the preferred NSX Edgenode fails and recovers, it will preempt its peer and become the active node. The peer will change its state to standby.
    Non-preemptive If the preferred NSX Edge node fails and recovers, it will check if its peer is the active node. If so, the preferred node will not preempt its peer and will be the standby node. This is the default option.
  7. (Optional) Select an NSX Edge cluster if you want this tier-1 gateway to host stateful services (NAT, load balancer, or firewall).

    If an NSX Edge cluster is selected, a service router will always be created (even if you do not configure stateful services), affecting the north/south traffic pattern.

  8. (Optional) Select an NSX Edge node.
  9. (Optional) Click the Enable StandBy Relocation toggle to enable or disable standby relocation.
    Standby relocation means that if the Edge node where the active or standby logical router is running fails, a new standby logical router is created on another Edge node to maintain high availability. If the Edge node that fails is running the active logical router, the original standby logical router becomes the active logical router and a new standby logical router is created. If the Edge node that fails is running the standby logical router, the new standby logical router replaces it.
  10. Click Save.
  11. (Optional) Click Route Advertisement.
    Select one or more of the following:
    • All Static Routes
    • All NAT IP's
    • All DNS Forwarder Routes
    • All LB VIP Routes
    • All Connected Segments and Service Ports
    • All LB SNAT IP Routes
    • All IPSec Local Endpoints

    In the Set Route Advertisement Rules field, click Set to add route advertisement rules.

  12. (Optional) Click Service Interfaces and Set to configure connections to segments. Required in some topologies such as VLAN-backed segments or one-arm load balancing.
    1. Click Add Interface.
    2. Enter a name and IP address in CIDR format.
    3. Select a segment.
    4. In the MTU field, enter a value between 64 and 9000.
    5. In the ND Profile field, select a profile.
    6. Click Save.
  13. (Optional) Click Static Routes and Set to configure static routes.
    1. Click Add Static Route.
    2. Enter a name and a network address in the CIDR or IPv6 CIDR format.
    3. Click Set Next Hops to add next hop information.
    4. Click Save.