[Serusers] Please help : how to disable losse routing ???

[Martin Koenig]

Hello,

Ngrep:

Hello,

ngrep dump:

#
U 2004/09/16 12:42:01.791105 4.5.6.156:5060 -> 1.2.3.67:5070
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.67:5070;branch=z9hG4bK0a65d941.
From: "tpl-dev" <sip:t02 at example.com>;tag=0006283e0a68003a5a99de34-50ace3d6.
To: <sip:00358400589247 at example.com>;tag=1c16103.
Call-ID: 0006283e-0a680037-0dc88799-351df346 at 1.2.3.67.
CSeq: 102 INVITE.
Contact: <sip:00358400589247 at 11.22.33.66;user=phone>.
Record-Route:
<sip:+358400589247 at 1.2.3.68:5070;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>,
<sip:+358400589247 at 1.2.3.69:5070;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>,
<sip:00358400589247 at 4.5.6.156;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>.
Supported: em,timer,replaces,100rel.
Allow:
REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUBSCRIBE.
Server: Audiocodes-Sip-Gateway-tpl_voip_gw1/v.4.20.354.574.
Content-Type: application/sdp.
Content-Length: 208.
.
v=0.
o=AudiocodesGW 49132 44576 IN IP4 11.22.33.66.
s=Phone-Call.
c=IN IP4 11.22.33.66.
t=0 0.
m=audio 6000 RTP/AVP 8 96.
a=rtpmap:8 pcma/8000.
a=rtpmap:96 telephone-event/8000.
a=fmtp:96 0-15.
a=ptime:20.

#
U 2004/09/16 12:42:02.008739 1.2.3.67:5070 -> 4.5.6.156:5060
ACK
sip:00358400589247 at 4.5.6.156:5060;ftag=0006283e0a68003a5a99de34-50ace3d6;lr
SIP/2.0.
Via: SIP/2.0/UDP 1.2.3.67:5070;branch=z9hG4bK2c7403dc.
From: "tpl-dev" <sip:t02 at example.com>;tag=0006283e0a68003a5a99de34-50ace3d6.
To: <sip:00358400589247 at example.com>;tag=1c16103.
Call-ID: 0006283e-0a680037-0dc88799-351df346 at 1.2.3.67.
CSeq: 102 ACK.
User-Agent: CSCO/7.
Route:
<sip:+358400589247 at 1.2.3.69:5070;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>,
<sip:+358400589247 at 1.2.3.68:5070;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>,
<sip:00358400589247 at 11.22.33.66:5060;user=phone>.
Content-Length: 0.
.

#
U 2004/09/16 12:43:55.175413 1.2.3.67:5070 -> 4.5.6.156:5060
BYE
sip:00358400589247 at 4.5.6.156:5060;ftag=0006283e0a68003a5a99de34-50ace3d6;lr
SIP/2.0.
Via: SIP/2.0/UDP 1.2.3.67:5070;branch=z9hG4bK6c7c16c5.
From: "tpl-dev" <sip:t02 at example.com>;tag=0006283e0a68003a5a99de34-50ace3d6.
To: <sip:00358400589247 at example.com>;tag=1c16103.
Call-ID: 0006283e-0a680037-0dc88799-351df346 at 1.2.3.67.
CSeq: 103 BYE.
User-Agent: CSCO/7.
Content-Length: 0.
Route:
<sip:+358400589247 at 1.2.3.69:5070;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>,
<sip:+358400589247 at 1.2.3.68:5070;ftag=0006283e0a68003a5a99de34-50ace3d6;lr>,
<sip:00358400589247 at 11.22.33.66:5060;user=phone>.
.
end dump

1.2.3.67 is the cisco 7960
4.5.6.156 is the local proxy
1.2.3.68 and .69 are proxies along the way
11.22.33.66 is the pstn gateway

As you can see, the cisco receives an ok with record route header field, the
last entry 4.5.6.156:5060. Contact 11.22.33.66:5060 is the Gateway.

In my understanding for proper loose routing the ACK and also the following
bye should be sent like this:

ACK sip:00358400589247 at 11.22.33.66:5060 (the final destination)
Route:
<sip:00358400589247 at 4.5.6.156:5060;lr>,<sip:+358400589247 at 1.2.3.69:5070;lr>,
<sip:+358400589247 at 1.2.3.68:5070;lr>

Which is the reverse order of the record route from the 200 ok.

But instead the Cisco sends:

ACK sip:00358400589247 at 4.5.6.156:5060 (the next hop)
Route:
<sip:+358400589247 at 1.2.3.69:5070;lr>,<sip:+358400589247 at 1.2.3.68:5070;lr>,
<sip:00358400589247 at 11.22.33.66:5060> (the final destination).

This looks like strict routing to me.

Regards,
Martin



> -----Original Message-----
> From: Jan Janak [mailto:jan at iptel.org] 
> Sent: Thursday, September 16, 2004 11:03 AM
> To: Martin Koenig
> Cc: nruiz at vivaction.com; serusers at lists.iptel.org
> Subject: Re: [Serusers] Please help : how to disable losse routing ???
> 
> I am using 7960 myself and do not have any problems, please send ngrep
> dumps.
> 
>   Jan.
> 
> On 16-09 10:48, Martin Koenig wrote:
> > I'm seeing some strange loose routing behaviour with my 
> testing Cisco 7960
> > phone. I'm trying to put ngreps on the list as soon as i 
> have the time.
> > Maybe this is a cisco-specific problem?
> > 
> > Regards,
> > Martin
> > 
> > > -----Original Message-----
> > > From: Nicolas RUIZ [mailto:nruiz at vivaction.com] 
> > > Sent: Tuesday, September 14, 2004 12:03 PM
> > > To: 'Jan Janak'
> > > Cc: 'Jiri Kuthan'; franz.edler at utanet.at; 'Martin Koenig 
> > > [toplink-plannet GmbH]'; serusers at lists.iptel.org
> > > Subject: RE: [Serusers] Please help : how to disable 
> losse routing ???
> > > 
> > > OK,
> > > 
> > > Thanks a lot for your support
> > > 
> > > Best regards
> > > 
> > > Nicolas RUIZ
> > > VIVACTION
> > > FRANCE, PARIS
> > > 
> > > -----Message d'origine-----
> > > De : Jan Janak [mailto:jan at iptel.org]
> > > Envoyé : mardi 14 septembre 2004 11:44
> > > A : Nicolas RUIZ
> > > Cc : 'Jiri Kuthan'; franz.edler at utanet.at; 'Martin Koenig 
> > > [toplink-plannet
> > > GmbH]'; serusers at lists.iptel.org
> > > Objet : Re: [Serusers] Please help : how to disable losse 
> routing ???
> > > 
> > > 
> > > On 13-09 16:41, Nicolas RUIZ wrote:
> > > > Thanks for your help,
> > > >
> > > > That's right, My gateway cisco is not according to RFC 
> > > 3261, and that's
> > > why
> > > > , I want to use only strict-routing.
> > > 
> > >   Loose routing is backwards compatible, it should work 
> even if the
> > >   gateway does not support loose routing. The problem must be 
> > > somewhere
> > >   else, presumably one of the end-points is broken.
> > > 
> > > > And if I want to use "record_route_strict", I have to 
> > > rebuild the module
> > > rr
> > > > or not?
> > > 
> > >   Yes.
> > > 
> > >     Jan.
> > > 
> > > 
> > > 
> > > 
> > > 
> > 
> > _______________________________________________
> > Serusers mailing list
> > serusers at lists.iptel.org
> > http://lists.iptel.org/mailman/listinfo/serusers
>