[Serusers] Call expires after 30 seconds with SER + MEDIAPROXY +VOVIDA B2BUA

[Alberto Cruz]

When the SER receives the call from the UA it forwards the call to the 
B2BUA it is because the B2BUA is replying directly the 183 and 200 ok 
messages (I guess).
                                                                    
The BYE retransmisions are due the B2BUA is sending the BYE with a 
different route:
U 2005/06/26 23:00:05.104387 200.94.75.6:5065 -> 200.94.75.6:5060
BYE sip:018183324166 at 200.94.75.6:5060;lr=on SIP/2.0.
Via: SIP/2.0/UDP 200.94.75.6:5065.
To: 8183651723 
<sip:8183651723 at sipsrv.conecta-te.com>;tag=d96bd682df5aa957o0.
From: <sip:018183324166 at sipsrv.conecta-te.com>;tag=71eb8754.
Call-ID: 1a18e21e-eaa9b26b at 172.31.253.127.
CSeq: 102 BYE.
Max-Forwards: 16.
Route: <sip:8183651723 at 200.94.75.6:61767>.
Record-Route: <sip:200.94.75.6;ftag=d96bd682df5aa957o0;lr=on>.
Contact: 8183651723 <sip:8183651723 at 172.31.253.127:5060>.
User-Agent: Linksys/PAP2-2.0.12(LS).
Content-Length: 0.
P-hint: rr-enforced.

As you can see for some reason it is mixing the SER IP address with the 
UA rport.

I guess as this route doesn't exist it is because there are a lot of 
retransmissions.

I have the SER debug from this call too. I can sent you if it's necessary

Regards

Alberto
Klaus Darilion wrote:

> The first strange thing is, that the 183 and 200 OK messages bypass 
> the first proxy and the messages are sent directly from the B2BUA to 
> the SIP client. Although the ACKs look fine.
>
> And there is a problem with the BYE - you have a lot of 
> retransmissions of the BYE from the B2BUA to the client - maybe a NAT 
> problem?
>
> regards
> klaus
>
> Alberto Cruz wrote:
>
>> Hi Klaus
>>
>> I'm trying to do the following:
>>
>> UA behind a NAT ----> SER+MEDIAPROXY --------> B2BUA -----> 
>> SER+MEDIAPROXY------> PSTN GATEWAY
>>
>> The first callee is the UA behind the NAT and then the B2BUA calls to 
>> the PSTN.
>> The B2BUA has a public IP address (isn't nated)
>> The PSTN GATEWAY has a public IP address too.
>>
>> I'm attaching the full NGREP sniffing from the call in order you can 
>> see all the flow.
>>
>> Regards
>>
>> Alberto Cruz
>> Klaus Darilion wrote:
>>
>>> 30 seconds calls are usually an ACK problem due to NAT. Make sure 
>>> the callee receives the ACK.
>>>
>>> regards,
>>> klaus
>>>
>>> Greger V. Teigre wrote:
>>>
>>>> Only B2BUA can generate a BYE, so it's definitely not SER. However, 
>>>> there may be something else that causes Vovida to generate it. I 
>>>> would start in that end. I don't know Vovida, so I wouldn't know 
>>>> where to start...
>>>> g-)
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Serusers mailing list
>>>> serusers at lists.iptel.org
>>>> http://lists.iptel.org/mailman/listinfo/serusers
>>>>
>>>>
>>>
>>>
>>>
>>
>
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