what are the prerequisites for NSX 6.2
I have license of Vsphere 6 Enterprise (not Plus), i can install NSX ?, one of the prerequisites are the dvs, but without enterprise plus license, can I activate them?
or license for dvs, is included in the NSX license?
You need to buy NSX licenses to run it.
Very early versions required you to have Enterprise Plus vSphere licenses as well to license the DVS.
Now you just need an NSX license and it will license the DVS too.
Licensing pricing and editions have just changed.
Below are some related KBs that may be helpful
VMware KB: Licensing VMware vSphere 5.5.x/6.0.x and VMware NSX for vSphere 6.x
If you are using VMware vSphere 5.5 Update 3 or vSphere 6.0.x, VMware NSX for vSphere 6.x does not require a vSphere Enterprise Plus license and can run on any vSphere edition.
VMware KB: Overview of vNetwork Distributed Switch concepts
Note: vDS now comes bundled with NSX for vSphere (NSXv) and VMware Virtual SAN (VSAN) in vSphere 6.0.
In VMware NSX for vSphere 6.2.1, adding an ESXi host to the vSphere Distributed Switch fails with the error: Host <IP address> is not licensed for the VDS feature. Cannot add this host to dvSwitch (2143397)