A virtual routing and forwarding (VRF) gateway makes it possible for multiple instances of a routing table to exist within the same gateway at the same time. VRFs are the layer 3 equivalent of a VLAN. A VRF gateway must be linked to a tier-0 gateway. From the tier-0 gateway, the VRF gateway inherits the HA mode, Edge cluster, internal transit subnet, T0-T1 transit subnets, and BGP routing configuration.
If you are using NSX Federation, you can use the Global Manager to create a VRF gateway on a tier-0 gateway if the tier-0 spans only one location. VRF gateway is not supported on stretched tier-0 gateways in NSX Federation. EVPN is not supported in NSX Federation.
Note that even though a VRF gateway has an HA mode, it does not have a mechanism to respond to a communication failure that is independent of the tier-0 gateway’s mechanism. If a VRF gateway loses connectivity to a neighbor but the criteria for the tier-0 gateway to fail over are not met, the VRF gateway will not fail over. The only time a VRF gateway will fail over is when the tier-0 gateway does a failover.
How to Deploy a VRF Lite GW
First let us create an uplink trunk segment that is connected to the uplink interfaces of each VRF GW
Provide a name
Select your VLAN TZ
Also put in the VLANs you already setup
Provide a name
Select a T0 GW to connect to
Provide a name, IP, and connect to the pre-created segment
Also select an edge node and provide the VLAN ID
Set BGP neighbors
Add BGP neighbor
Enter I address
Remote AS number
Now you can create T1 GW and segments and use the VRF GW like you would a traditional T0 GW