S1 Application Protocol (S1AP)

E-UTRAN radio network layer signalling protocol for the S1 interface


Protocol dependencies

  • SCTP: Typically, S1AP uses SCTP as its transport protocol. The the PPID for S1AP traffic is 18.

Example traffic

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


The S1AP dissector is automatically generated from ASN1 descriptions by Asn2wrs and is fully functional.

Preference Settings

The SCTP port can be set with a preference.

Example capture file

XXX - Add a simple example capture file to the SampleCaptures page and link from here (see below). Keep this file short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.

Display Filter

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

Show only the S1AP based traffic:


Capture Filter

External links

  • 3GPP TS 36.413 Evolved Universal Terrestrial Radio Access (E-UTRA) ; S1 Application Protocol (S1AP)


Imported from https://wiki.wireshark.org/S1AP on 2020-08-11 23:24:16 UTC