I have 02 C6504-E with VSS (Virtual Switching System)
and 02 C3750X-24T-L used Stack
How to you Cisco Prime Infrastructure to monitor VSS & Stack tatus?
Virtual Switching technology is the process of combining two standalone distribution switches found in the local distribution layer into a single management point.
The Virtual Switching System functions and appears as a single switch to the wiring closet and the core layer. You can also create Virtual Switching Systems with a pair of standalone switches available in the core layer.
For configuration please check the below link: