check_procurve_loop

To use the script, copy it to the plugin directory for your installation (for example /usr/lib/nagios/plugin), then add the following command definition in commands.cfg:

define command{
command_name check_procurve_loop
command_line $USER1$/check_procurve_loop -H $HOSTADDRESS$ -C $ARG1$
}

Define a service which calls the above command with the snmp community name as its only argument, like so:

define service {
use generic-service
host_name MYSWITCH
service_description Loop protection
check_command check_procurve_loop!public
}

A successful check, one where no loop is found, returns:
OK - No loops detected (24 ports checked)

If a loop is found, for example between ports 8 and 19, the return value is:
CRITICAL - found a loop on the following ports: 8 19 (24 ports checked)