Log in as superuser.
Check to see if there is an SNMP daemon (snmpd) running on port 161.
If an SNMP daemon is running, make sure you know how to restart it and which MIB trees it supports. Then kill its process.
Edit the CONFIG file located in plugins/snmp/magt in the server root directory.
(Optional) Define sysContact and sysLocation variables in the CONFIG file.