NSX host overlay network

Before you deploy the workload domain, you must configure the NSX host overlay network on the SmartFabric. During VCF deployment, every VxRail node becomes an NSX host transport node. Each NSX host transport node is assigned a TEP IP address on the NSX host overlay network.

NSX host transport nodes get their TEP IP address from DHCP or an IP pool. If you use DHCP, as in this example, you specify the IP address of the DHCP server as an IP helper address in SFS.

Create w01 host overlay network - single rack topology

If you have a single rack SmartFabric topology (with a maximum of two leafs in the SmartFabric), create the NSX host overlay network as a Layer 3 VLAN. The network is created using the SFS UI or OMNI under Network > Networks > VLAN Networks.

Using the values in ‎Table 2 and ‎Figure 3, the w01-host-overlay network for a single rack topology is configured as shown in the figure below.

Figure 17. w01 NSX host overlay network configuration in a single rack topology

Create w01 host overlay network - multirack topology

If you have a multirack SmartFabric topology (more than two leafs in the SmartFabric), create the NSX host overlay network as a Multirack Layer 3 VLAN. Doing this allows you to put hosts that are in the same domain in different racks. You can create the network using the SFS UI or OMNI under Network > Networks > Multirack L3 VLAN.

Using the values in ‎Table 2 and ‎Figure 3, the w01-host-overlay network for a multirack topology is configured as shown in the figure below.

Figure 18. w01 NSX host overlay network configuration for multirack Layer 3 VLAN