NSX-T 3.0 Series: Part9-Create Segments & attach to T1 gateway

In Part 9, we move to creating a Segments (also known as logical switches in NSX-V).

NSX-T 3.0 Series: Part1-NSX-T Manager Installation
NSX-T 3.0 Series: Part2-Add additional NSX-T Manger & Configure VIP
NSX-T 3.0 Series: Part3-Add a Compute Manager (vCenter Server)
NSX-T 3.0 Series: Part4-Create Transport Zones & Uplink Profiles
NSX-T 3.0 Series: Part5-Configure NSX on Host Transport Nodes
NSX-T 3.0 Series: Part6-Depoy Edge Transport Nodes & Create Edge Clusters
NSX-T 3.0 Series: Part7-Add a Tier-0 gateway and configure BGP routing
NSX-T 3.0 Series: Part8-Add a Tier-1 gateway
NSX-T 3.0 Series: Part9-Create Segments & attach to T1 gateway
NSX-T 3.0 Series: Part10-Testing NSX-T Environment

Let me highlight logical switches / segments from the diagram in my earlier post.

App, Web & DB are segments in this diagram. And can have any network that you define while creating the segment. (.1) will be the gateway ip address for all VM’s that gets attached to these segments respectively. It’s a layer 2 domain since it has to cross the router to reach different network. Lets have a look at the types of Segments.

VLAN Baked Segments: In this type, you will define a VLAN ID for the segments, however you also have to make sure that the same vlan DOES exists on your physical infrastructure too.

Overlay Backed Segments: This segment can be configured without any configuration on the physical infrastructure. It gets attached to Overlay Transport Zone and traffic is carried by a tunnel between the hosts.

We will create an Overlay Backed Segment.

Log into NSX-T Manager VIP and navigate to Networking >Segments >Segments >ADD SEGMENT

Name: HR
Connectivity: Connect it to your Tier-1 Gateway that you created in earlier step.
Transport Zone: Select ‘Horizon-OverlayTZ’
Subnet: ’10.10.70.2/24’ You need to discuss this with your network admin beforehand.

Rest all parameters to be on default for now.

Click Save.

Likewise, You can create App, Web & DB segments and connect it to Tier-1 router. Attach a VM to respective segments and they should be able to ping to each other.

For example,
VM1 with an IP address 172.16.11.10/24 and gateway 172.16.11.1 – Connect it to App Segment.
VM2 with an IP address 172.16.12.10/24 and gateway 172.16.12.1 – Connect it to Web Segment.

Both of them should be able to ping each other. Here, we achieve East-West routing. Routing takes place at Tier-1 router without going North. Check the topology after creating those 3 segments.

That’s it. We have created new network for our VM’s to connect to.

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