Hi Felix,
Easiest way to do that is as follows:
1. =/ipmon
2. Filter stack from command line
3. Action 'WI' against the stack
4. Tab down until you see that ifStatusOper attribute for the Link/Qualifier you want
5. UA e Fs ifStatusOper
6. From here just create a bogus value that you know will create an alert condition
7. You can either create an ACTION that has a SNMPTRAP, or you can use =/PARM - Alerts, and create an Alert Forwarder as an SNMP trap.
Thanks,
Steve