Check manual page of cisco_stackpower
CISCO Switch Catalyst 3750-E Series: Stack Port Link States
This check monitors the link states of the stack ports of a
Cisco Switch of the Catalyst 3750-E Series.
If the link is up then the service reports OK.
If the link is forced down or not connected then the service state
will be CRIT.
The stackpower interface number.
One service per stackpower interface is created.