We have devices which have a special snmp ALARM-MIB. If there are any alarms these devices have a snmp table with all existing alarms, descriptions, times, severity, etc. If there are no alarms, their alarm table is empty. (Not very well designed, i know)

I created a LLD to discover these alarms in very short periods. This LLD creates one item (it's the alarm description) and a trigger to allow me to signal this alarm through zabbix.

The Problem is that I have to insert a trigger expression, which raises the trigger. In our case the sole existense of the item means there is an alarm to trigger.

I tried to insert "1=1" into trigger expression, but it is not accepted by zabbix.
If I insert any expression like

{item}<>"" the trigger will raise very delayed, because zabbix needs some snmp requests on that item to get the value of {item}

. Even if I set the items interval to 15s.

So please allow "1=1" as trigger expression (better), or make trigger expression optional and automatically raise trigger on existense. Right now I don't know how to monitor these alarm tables in time.

Thank you,
Holger