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MTP2 User Peer-to-Peer Adaptation Layer (M2PA)

M2PA is part of the SIGTRAN suite of protocols to transport SS7 over IP. It functionally replaces MTP2 and below.

It should not be confused with M2UA which serves a similar purpose.


XXX - add a brief description of M2PA history

Protocol dependencies

Example traffic

XXX - Add example decoded traffic for this protocol here (as plain text or Wireshark screenshot).


The M2PA dissector is fully functional. It currently states that it decodes only up to Internet Draft-12 but it works just fine with implementations conforming to the RFC version. (If there are really no differences between Draft-12 and the RFC the dissector should be updated to indicate that it supports the RFC version.)

Preference Settings

The M2PA dissector is able to decode the following versions of the M2PA protocol, based on the dissector's preference setting:

Example capture file

Display Filter

A complete list of PROTO display filter fields can be found in the display filter reference

Capture Filter

You cannot directly filter for M2PA while capturing. However, if you know the SCTP port used (see above), you can filter on that.


M2PA (last edited 2009-04-11 14:05:33 by JeffMorriss)