If Index used by SNMP (linkDown Trap)

Question: I receive this trap in my trap receiver:

Tue Feb 03 13:49:14 2009 SWITCHNAME- Cisco Agent Interface Down (linkDown Trap) on interface id;nr .1.3.6.1.6.3.1.1.5.3.1.3.6.1.4.1.9.1.283 0

How can I figure out which interface sends this trap?

Answer: In your switch you can use the following command to find out which interface has which index:

sh snmp mib ifmib ifindex