vSphere with Tanzu using NSX-T - Part5 - Tier-1 Gateway and Segments

In the previous posts we discussed the following: 

Part1: Prerequisites

Part2: Configure NSX-T

Part3: Edge Cluster

Part4: Tier-0 Gateway and BGP peering

The next step is to create a Tier-1 Gateway and network segments. 

• Add Tier-1 Gateway.
• Provide name, select the linked T0 Gateway, and select the route advertisement settings.

• Add Segment.
• Provide segment name, connected gateway, transport zone, and subnet.
• Here we are creating an overlay segment and the subnet CIDR 172.16.10.1/24 will be the gateway IP for this segment.

Now, let's verify whether this segment is being advertised (route advertisement) or not. Following is the screenshot from both edge nodes and you can see that the Tier-0 SR is aware of 172.16.10.0/24 network:

As Tier-0 Gateway is connected to the TOR switches via BGP, we can verify whether the TOR switches are aware about this newly created segment. 

You can see that the TORs are aware of 172.16.10.0/24 network via BGP. Let's connect a VM to this segment, assign an IP address, and test network connectivity. 

You can also view the network topology from NSX-T.

This is the traffic flow: VM - Network segment - Tier-1 Gateway - Tier-0 Gateway - BGP peering - TOR switches - NAT VM - External network.

Hope this was useful. Cheers!