[SR-Users] How to disable retransmits via TCP connection? etc.

[Andrey Utkin]

2015-06-19 12:45 GMT+03:00 Daniel-Constantin Mierla <miconda at gmail.com>:
> Also, ngrep is not always good at capturing big packets, so just seeing
> partial sip packets is ok as long as the receiving party doesn't
> complain of broken/incomplete sip packet.

Thank you Daniel for answering.
We still struggle from this weird issue. Now I can reproduce it in my
location with recent Kamailio from git, with all SIP over TCP clients
- Linphone, Sipdroid, Jitsi (desktop Java-based app).
Here are ngrep logs from both server and client sides, and server
syslog containing Kamailio output (filtered by substring "tcp"
case-insensitively).
https://gist.github.com/krieger-od/55427f2b3923b910bacb
https://gist.github.com/krieger-od/c9fe6ea4bb64fac82cda
https://gist.github.com/krieger-od/96ef40ca15ef2407b5f4

Here you can see that only a "tail" of INVITE message gets transmitted
to client side, which is weird.
This is Amazon server; it have MTU 9001 by default, but setting it to
900 or 1100 haven't made any difference. Also I have reproduced this
issue on DigitalOcean VPS, so this mustn't be Amazon-specific issue.
Because I have tried different SIP useragents supporting TCP, I'm
afraid this can be considered Kamailio issue (honestly, I still don't
quite believe as I percept Kamailio as robust and stable software).
Any review and comment helps.

-- 
Andrey Utkin