Assigned SCION Protocol Numbers

This document lists the assigned SCION protocol numbers.

Considerations

SCION attempts to take the IANA’s assigned internet protocol numbers into consideration. Widely used protocols will have the same protocol number. SCION specific protocol numbers start at 200 which makes them very unlikely to clash.

The protocol numbers are used in the SCION Header to identify the next level protocol.

Assignment

Decimal Keyword Protocol
0-5   unassigned
6 TCP/SCION Transmission Control Protocol over SCION
7-16   unassigned
17 UDP/SCION User Datagram Protocol over SCION
18-199   unassigned
200 HBH SCION Hop-by-Hop Options
201 E2E SCION End-to-End Options
202 SCMP SCION Control Message Protocol
203 BFD/SCION BFD over SCION
204-252   unassigned
253   use for experimentation and testing
254   use for experimentation and testing
255   reserved