SNMPv2 messages are sent using IPX packet type 4 (i.e., Packet Exchange Protocol).
It is suggested that administrators configure their SNMPv2 entities acting in an agent role to listen on IPX socket 36879 (900f hexadecimal). Further, it is suggested that notification sinks be configured to listen on IPX socket 36880 (9010 hexadecimal)
When an SNMPv2 entity uses this transport mapping, it must be capable of accepting messages that are at least 546 octets in size. Implementation of larger values is encouraged whenever possible.