How can I find SX6036G Switch GUID on CLI?

I purchased 2 of SX6036G Gateway Systems.

I met a problem in configure SM at add a Root nodes that switch GUID.

I used 4036, 5035 Fabric IT based system that has a Fabric Inspector or ibnetdiscover cli command.

But, SX6036(G) and later system change Fabric Inspector license to optional.

Sure! I can find my switch GUID on a seperate host which installed Mellanox OFED or old 4036 system.

I saw a link below.

Mellanox LIC-Fabric-Inspector Enhanced IB Diagnostics License for FOR 1 MANAGED NODE - Mellanox Store

This is a 1 node license.

I think node means that equiped a HCA on system.

But this is a switch.

Should I must buy at least lot of 36 LIC-Fabric-Inspector licenses per my SX6036G?