The var parameter

The var parameter associates a user-defined trap name (specified by the trapname variable in the snmp traps command or Trap Name in FilerView) with a specific MIB object. The MIB object is specified in the value field of the snmp traps command. It must be of the form snmp.oid, where oid is an Object Identifier (OID).

Note: The traps.dat file, located in the /etc/mib directory on your storage system, can help you determine OIDs. This file maps MIB objects' short names in the Data ONTAP MIB files to their numeric OIDs. For more information about a particular OID, see the MIB.

In FilerView, it is necessary to enter only the numerical OID, and not the "snmp" prefix.