Re: [Openh323gk-users] Q931 Error

Wed, 04 Jul 2007 22:54:13 -0700
My suggestion is you try GK1 and GK2 as neighbors and not GK2 registered with GK1. That way the signalling goes directly from YATE to GK2. to see if that works. 


You will need to provide a level 5 trace of GK2  with your current 
configuration to determine exactly why it may be trying to reassign a Q.931 
channel.


Simon

At 08:54 AM 5/07/2007, Edson wrote:

Hummm...  I’ll try to explain how thinks are tied together. Hoppefully it 
helps…. ;)



SER recieves the INVITE through IP X, port 5060/UDP (normal SIP port), 
identify that’s from a NATed UA and prepare internal pointers. It also 
recognize the prefix (in this case 9809) that flags the call to Yate. The 
call is relayed to Yate who is listenning on IP X, but port 5080/UDP.
Now Yate initiate the negotiations as defined in its routing policy with 
its H323 side. Yate is registering itself on GK1 as a Gateway (it’s not a 
permanent endpoint and uses IP X, port 1730/UDP) but, as I didn’t find a 
way to register a prefix from Yate itself I declare it in the 
[RasSrv::GWPrefixes] section. So now the signalization part of the call is 
already on H323 side.



Let’s start other way around. T21 is registered as terminal on GK2 (normal 
port), which is registered to GK1 (through normal port) with its own 
prefix (47 in this case). T01 is also registered on GK1 (through normal 
port – the port is changed on the first packet by IPTables), but as a 
terminal. Since it’s on my internal LAN, it’s registered as a NATed point.



Now thinking back on the call, it arrives on GK1, and using trace level 6, 
I see odd things:

1-       the packet arrives and generates a ACF (that’s ok);
2-       the packet is analised and forwarded to GK1 (that’s odd);

3-       this forwarded packet is followed by all FastStart required 
packets (that’s ok);
4-       this forwarded packet recieves a ReleaseComplete, since the port 
assigned is already on use by another Q.931 channel (the packet arrived 
and trated on 1 & 2);
5-       call is Released with Q.931 error (not what I wanna, but what it 
got);

6-       SIP side recieves a 404 (number/user not found).


Forgive me if I didn’t understand Your first question, but if You explain 
it a little bit more, maybe I can provide You some valuable information.


Edson

----------

From: [EMAIL PROTECTED] 
[mailto:[EMAIL PROTECTED] On Behalf Of M.Emran

Sent: quarta-feira, 4 de julho de 2007 19:01
To: GNU Gatekeeper Users
Subject: Re: [Openh323gk-users] Q931 Error


Did u bridge yate with GK2 ?you have to register yate to GK2 or you have 
to add yate ip to permanent endpoint with prefix...

On 7/5/07, Edson <<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]> wrote:

You are right in pointing this port problem...




At my first test Yate and GK1 were on the same machine, but I let GK1 on 
port 1720 and changed Yate to port 1730.. didn't work. Then I move Yate to 
SER machine… also didn't work. Know I have:



- SER and Yate on same machine in a Internet machine (SER on port 5060, 
MediaProxyand on ports 51000~51600 and Yate on port 5080 and RTP on ports 
60000~65000);


- GK1 on a machine in a Internet machine (all default ports);

- GK2 on my home border with ADSL connection.




So I doubt that there is some port issue. I was first thinking that it 
could be some routing issue, but since I can make a call from T01, I give 
up from this thinking path.




But again, thanks for Your thought…. Any other?

Edson

----------

From: 
<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED] 
[mailto: [EMAIL PROTECTED] On Behalf Of M.Emran

Sent: quarta-feira, 4 de julho de 2007 17:21
To: GNU Gatekeeper Users
Subject: Re: [Openh323gk-users] Q931 Error




yate and gnugk are listening same port.try to change port from 1720 to 
51720 of yate.




hope it will work.



On 7/5/07, Edson <<mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED]> wrote:

Hi...

I need some help... I'm lost... This is my LAB scenario:

      GK1        SER
     / | \      /   \
    /  |  \    /     \
GK2  T01  Yate      UA1
  |
  |
T21

When I call T21 from T01, it rings and I can talk ok.
When I call T21 from UA1, I got error Q931, cannot alocate port xxxx,
already in use.

Any ideas on what's happening? I know that this same error is given when
there is no route to destiny, but it's not the case... I already rechecked
to ensure that there where no number/prefix errors.

Edson


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