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in reply to How to send an SNMP V2C Trap

1.3.6.1.6.3.1.1.5.1??

In my lan
snmpwalk -c my_community 172.17.0.21 1.3.6.1.6.3.1.1.5.1
responds:
coldStart No more variables left in this MIB View (It is past the end of the MIB tree)

Ahh... ok!!
I have viewed this documentation:
http://net-snmp.sourceforge.net/docs/mibs/snmpMIB.html

However, you must use
use Net:SNMP
The documentatios is here:
http://net-snmp.sourceforge.net/tutorial/tutorial-5/commands/index.html

An example is in this application (GPL software) http://sourceforge.net/projects/mal