Idea for synchonous logging/review of debug + GSMTAP

Ivan Kluchnikov Ivan.Kluchnikov at
Tue Jan 29 14:19:22 UTC 2013

Hi all,

Yes, I actually have many problems when debugging PCU too, so I think
that using GSMTAP is good solution, because it is fast solution, and
it will be really helpful.
About human-readable PCU log messages, I think that using prefixes is
normal, but we should use TFI+TLLI for prefix, because especially for
PCU debugging it is very important to have ability to control
particular TBF.

2013/1/29 Harald Welte <laforge at>:
> On Tue, Jan 29, 2013 at 04:37:38PM +0400, Alexander Chemeris wrote:
>> > I would treat those two independent.  The case for GSMTAP is simply to
>> > have a synchronous / monotonic log (pcap in this case) that combines
>> > both actual packets on Gb and Um, as well as the human-readable log
>> > messages generated by the PCU code in between.
>> Just to clarify. Do you just want to transfer a normal log string as a
>> payload in a GSMTAP message, so that it'll be shown in Wireshark
>> "Info" column?
> yes.
> --
> - Harald Welte <laforge at> 
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                   (ETSI EN 300 175-7 Ch. A6)

Ivan Kluchnikov.

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