I am creating a custom Trap parser Link down configured similar to the default link down trap parser except I was putting a match criteria.

The default link down is also activated at the same time.

However, my custom trap parser never gets triggered, always the default link down.

The match criteria is based on the varbind 1 corresponding to the interface index and it is properly configured but I cannot figure out why it is not working.

Disabling the default link down trap parser also results in the custom link down parser not triggering.

I just wanted your help in figuring what I am doing wrong.

The ultimate purpose is to send an SMS notifications with message detailing the a custom message of that particular interface( the description of the interface-alias instead of the interface name) triggering the trap.