This is very easy to do. There is already rulesets which demonstrate what is necessary.
For demonstration purposes, you can use this attached ruleset, it is a catch all. I have built in rules for ignoring certain Incidents or Errors. As for Incidents, a severity is set for every incident, so in my ruleset it will only allow incidents with a severify 5 or higher (1 being the highest).
This could easily be reconfigured to send traps for specific incidents.
Placement of this ruleset is very important. You can place it at the top for testing.
Hope this helps!
SNMP - Catch All.xml 16.9 K
Awsome. This covers all incidents. Thanks.