spdPacketPart is the front part of the full IP packet that triggered this notification. The initial size limit is determined by the smaller of the size, indicated by:

I. The value of the object with the TC syntax 'SpdIPPacketLogging' that indicated the packet SHOULD be logged and

II. The size of the triggering packet.

The final limit is determined by the SNMP packet size when sending the notification. The maximum size that can be included will be the smaller of the initial size, given the above, and the length that will fit in a single SNMP notification packet after the rest of the notification's objects and any other necessary packet data (headers encoding, etc.) have been included in the packet.