I'm having a hard time figuring out how to trigger an alert if a custom poller fails to return any data. In this particular case I'm monitoring a MS DHCP server - if the DHCP service somehow gets messed up the poller will recieve no data when polling the OID - I'd really like to trigger an alarm whenever this behavior is seen..
I've allready tried triggering on "Status is empty" or "Status is less than x" but no alerts are triggered - what am I missing ??