27 Aug
2012
27 Aug
'12
10:14 p.m.
Hello,
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On 8/27/12 5:22 PM, Simon Hintermann wrote:
Hello,
I will try with a smaller "Subscription Expiry (s):" in my SNOM.
Just to be clear with the method of test:
- firewall redirects SNOM to my first ISP
- telephone works perfectly, registered in Kamailio...
- firewall redirects SNOM to my second ISP
- telephone is unregistered in Kamailio, impossible to "re-register"
the identity1, says "network error"
- only way to recover is to change the SNOM's IP address
what do you mean by 'firewall redirects Snom to Nth ISP'? Is the IP of
snom static or taken via dhcp from adsl router?
Cheers,
Daniel
Thanks for your support, greetings
Simon
Le 27.08.2012 09:04, Daniel-Constantin Mierla a écrit :
--
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat
Hello,
what is the expire time of your registrations? 24 hours seems a lot
to re-register.
From kamailio point of view, the contact is expired based on
un-registration or timeout. You can look with 'kamctl ul show' to see
if the phone is still registered or not.
Anyhow, in such cases is good to set registration time quite small,
say 5 or 10 minutes, but if there is a problem in the client side, it
is not much to do in server side.
What is the adsl routed, does it do SIP ALG? I have snom on ADSL
using tcp, does not seem to make big problems.
Cheers,
Daniel
On 8/16/12 2:10 PM, Simon Hintermann wrote:
Hello,
I am experiencing some disconnections with my VOIP phones.
Let me explain:
My server is an Asterisk + Kamailio in a datacenter with a fixed IP,
and a bridge firewall in front of it, so no NAT here.
My client (several offices) have usually no problem when they have a
fixed IP, but encounter fatal disconnection when they have a dynamic
IP. I had the case with Siemens, SNOM and Aastra phones, without any
difference. They are of course natted behind an ADSL router. I also
have clients doing load-balance between two ADSL lines, which is
also problematic.
The only way for me to recover is to change the private IP of the
VOIP phones. Seems more like a TCP problem or a routing problem, but
I am no network guru.
I have two ADSL lines to test it, and when I switch from one line to
another, every phone becomes "Not registered". Even falling back tot
he first line does not help recovering. I did not try to wait for
longer than 24 hours to recover.
So my question is, more generally: is it possible to allow the
clients (VOIP phones) to re-connect with a new IP address without
having closed correctly the first connection (SIP session, I
presume)? It seems not by default, but I played with the timeouts
server-side and phone-side, without luck.
I saw many posts with PBX having problems when behind a dynamic IP,
but nothing about the clients having dynamic addresses or
load-balancing. Normally, having a dynamic IP does not mean that
your IP will change « on-the-fly », but each time you shut down and
reboot later your ADSL router, but we came to the conclusion that
every client NOT having a fixed IP was experiencing fatal
disconnects. So I managed to test and validate this behavior with
our two ADSL lines.
Hope someone can help me.
Greetings
Simon
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Daniel-Constantin Mierla -http://www.asipto.com
http://twitter.com/#!/miconda -http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 -http://asipto.com/u/kat