This is the UDP port number used for the SNMP agent's secondary channel, defaulting to 162, the standard port for SNMP trap delivery. Since 162 is the conventional trap-receiver port, this is the field an admin checks first if traps configured to be sent from this node aren't arriving at the network management station, since a mismatch here versus the receiver's listening port silently drops all traps. For example, if the NMS trap receiver listens on 162 but this value was changed to 1162, alarms and threshold traps from this node would never reach the operations console.