[Serusers] ACK loop in SER - Route missing problem ?

[Greger V. Teigre]

Micheline,
Sipura has plenty of parameters that can be tweaked, but the standard should 
work.  ACK should be loose routed if the Route header is present, but maybe 
your GW hasn't record routed, its a UAS in a call from the PSTN.  Thus you 
should also make sure that if its not, it will be looked up as INVITEs.
g-)

----- Original Message ----- 
From: "Lambert, Micheline (Satnet)" <Lambert.M at emssatnet.com>
To: <serusers at lists.iptel.org>
Sent: Thursday, October 06, 2005 04:13 PM
Subject: [Serusers] ACK loop in SER - Route missing problem ?


> Hi,
>
> I'm using SER with Sipura and VoIP GW.
>
> When there is no line available from the VoIP GW, the VoIP GW replies with
> 486 Busy Here.
>
> The Sipura receives this message and sends an ACK.
> The ACK has the IP addr. Of the SER. If it is ok, the ACK does not include
> the "Route" parameter, is it a problem from the Sipura?
> This cause the SIP to loop the ACK because there is no Route and with the
> following code, the packet becomes too big!!!
>
>
> ............
>
>        if (!method=="REGISTER") record_route();
>
>        # ------------------------------------------------------------------
>        # Loose Route Section
>        # ------------------------------------------------------------------
>        # subsequent messages withing a dialog should take the
>        # path determined by record-routing
>        if (loose_route()) {
>                append_hf("P-hint: rr-enforced\r\n");
>                t_relay();
>                break;
>        };
> ......................
>
> Same configuration and same trace
>
>
> 192.168.20.155 is the SIP Proxy
>
> 192.168.20.105 is the VoIP GW
>
> 192.168.20.90 is the Sipura
>
>
>    312 54.858597   192.168.20.90         192.168.20.155        SIP/SDP
> Request: INVITE sip:3353 at 192.168.20.155, with session description
>    313 54.860243   192.168.20.155        192.168.20.90         SIP
> Status: 407 Proxy Authentication Required
>    314 54.877006   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>    315 54.886801   192.168.20.90         192.168.20.155        SIP/SDP
> Request: INVITE sip:3353 at 192.168.20.155, with session description
>    316 54.889720   192.168.20.155        192.168.20.105        SIP/SDP
> Request: INVITE sip:3353 at 192.168.20.105:5060, with session description
>    318 54.924666   192.168.20.105        192.168.20.155        SIP
> Status: 100 Trying
>    319 54.925866   192.168.20.155        192.168.20.90         SIP
> Status: 100 Trying
>    320 54.950257   192.168.20.105        192.168.20.155        SIP
> Status: 486 Busy Here
>    321 54.951442   192.168.20.155        192.168.20.90         SIP
> Status: 486 Busy Here
>    323 54.968942   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>    440 55.527290   192.168.20.105        192.168.20.155        SIP
> Status: 486 Busy Here
>    441 55.528528   192.168.20.155        192.168.20.90         SIP
> Status: 486 Busy Here
>    442 55.547237   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>    627 56.624649   192.168.20.105        192.168.20.155        SIP
> Status: 486 Busy Here
>    639 56.626924   192.168.20.155        192.168.20.90         SIP
> Status: 486 Busy Here
>    649 56.647321   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>    912 58.719683   192.168.20.105        192.168.20.155        SIP
> Status: 486 Busy Here
>    913 58.720967   192.168.20.155        192.168.20.90         SIP
> Status: 486 Busy Here
>    916 58.746851   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>   1192 62.806510   192.168.20.105        192.168.20.155        SIP
> Status: 486 Busy Here
>   1193 62.807741   192.168.20.155        192.168.20.90         SIP
> Status: 486 Busy Here
>   1194 62.827148   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>   1417 66.892115   192.168.20.105        192.168.20.155        SIP
> Status: 486 Busy Here
>   1418 66.893350   192.168.20.155        192.168.20.90         SIP
> Status: 486 Busy Here
>   1419 66.907704   192.168.20.90         192.168.20.155        SIP
> Request: ACK sip:3353 at 192.168.20.155
>   1628 68.143481   192.168.20.101        192.168.20.55         SIP
>
> Thanks.
>
> Micheline
>
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