Check manual page of cisco_vss

Cisco Switches: State of Virtual Switches
Distribution	official part of Check_MK
License	GPLv2
Supported Agents	SNMP

This check monitors the state of Virtual Switches formed by two Cisco Catalyst 45XX or 65XX switches. It makes sure that both switches are not in standalone mode and that all configured VSL links are up.

Discovery

One service is created if at least one chassis is in standby or active mode.