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

6 Oct 2005

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@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@192.168.20.155
    315 54.886801   192.168.20.90         192.168.20.155        SIP/SDP
Request: INVITE sip:3353@192.168.20.155, with session description
    316 54.889720   192.168.20.155        192.168.20.105        SIP/SDP
Request: INVITE sip:3353@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@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@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@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@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@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@192.168.20.155
   1628 68.143481   192.168.20.101        192.168.20.55         SIP

Thanks.

Micheline

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