Train Realtime Data Protocol

is a protocol defined in the standard IEC 61375-2-3 and mostly used for process data in train control and management systems (TCMS). There is also the Train Topology Discovery Protocol (TTDP), which uses TRDP with its specific payloads.

There is a quite comprehensive protocol description here: https://de.wikipedia.org/wiki/Train_Real_Time_Data_Protocol yet only in DE and ES, as of writing.

Ports used

• 17224/UDP - process data, ie., cyclic transmission
• 17225/UDP/TCP - message data

Dissector

tbc --> use of the XML feature and filtering

Example packet captures

• tbc