Network Security Blog

Create a Segment ID, A Segment ID in NSX means number of Logical switches that can be created. Segment ID's are like VLAN ID.
but VLAN can be from 1 to 4094, whereas Segment ID can be from 1 to 16,777,215. here we are using 5000 to 6000

1. Log in to the vSphere Web Client.
2. Navigate to Home > Networking & Security > Logical Switches.
3. Click Add or the New Logical Switch ( + ) icon.
4. Type a name and optional description for the logical switch.
5. Select the transport zone in which you want to create the logical switch.
   By default, the logical switch inherits the control plane replication mode from the transport zone.

As you can see in above diagram, we have 3 different VM's connected to same Logical switch.
Which means All the 3 VM's has to be in same Network and All these 3VM's will be communicated via Logical switch.

++A transport zone controls to which hosts a logical switch can reach. It can span one or more vSphere clusters. Transport zones dictate which clusters and, therefore, which VMs can participate in the use of a particular network.
Here Im using Global transport zone with replication mode as Unicast.

Multicast: Multicast will send a single packet from a source device to multiple destinations. This option requires Protocol Independent Multicast (PIM) to be enabled on your environment as well as IGMP. The documentation states it’s only recommended when you are upgrading from older VXLAN deployments.
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Unicast: The NSX controller handles the control plane.
Hybrid: Hybrid is a combination of both multicast and unicast.

Once the Logical Switch is added, double click the newly created logical switch and start assigning the Virtual Machines to it as shown below.
Example: Logical switch Name: Windows_Tier

Each logical switch that you create receives an ID from the segment ID pool, and a virtual wire is created. The virtual wire descriptor contains the name of the logical switch and the logical switch's segment ID.