Trouble with check_snmp_int.pl and isdn

Nagios
1

I am trying to use the check_snmp_int.pl script to monitor an isdn line. We want to be alerted when the line comes up instead of the usual notification when the interface goes down.

The check_snmp_int.pl script has an invert option but when invoked on the Dialer interface I get the following message:

./check_snmp_int.pl -H 192.168.xxx.xx -C xxxxxx -n Dialer12 -i
Use of uninitialized value in sprintf at ./check_snmp_int.pl line 500.
Dialer12:: 1 int NOK : CRITICAL

The invert option doesn’t seem to have an effect, the ouput is the same when run without the -i

The rub is that the script works fine when run against a serial interface.

Anyone have any sugesstion?

Thanks for your help

2

Why not use the check_snmp check instead?
The check can be used to see if some value matches for an oid. That oid I would assume is the interface status. If that value comes back as 0 (down) then that is a match and will not alert, but if anything else, then alert.