Padmajit,

if it is the case of spiraling then its okay to have multiple vias with same
'sentby' value but different branch ids.
but if your question is that proxy inserts multiple Via's first time itself
when it forwards the request then it makes no sense.

Why:
Proxy will forward the request on some particular single transaction and
which will be identified by the branch Id in the request.
So there is no point of inserting multiple branch Id's in the request. I
think it should clear your doubt.

Of course multiple branch Id's would be generated in case of forking but in
that case multiple requests will be forwarded with different branch Id's
not  a single request with multiple branch Id's.

- Nitin




On Fri, Jun 13, 2008 at 8:28 PM, Benjamin Jacob <[EMAIL PROTECTED]>
wrote:

>
> I think Padmaja's hinting that the proxy has inserted those 3 Vias the
> first time itself, before it could spiral it 'out' and receiving it back.
> If the proxy had spiralled it out, there would be other proxies's Vias as
> well.
>
> Care to clear this Padmaja?
>
>
>
>
> --- On Fri, 6/13/08, Scott Lawrence <[EMAIL PROTECTED]> wrote:
>
> > From: Scott Lawrence <[EMAIL PROTECTED]>
> > Subject: Re: [Sip-implementors] Proxy forwarding invite with multiple via
> headers
> > To: "padmaja venkata" <[EMAIL PROTECTED]>
> > Cc: [email protected]
> > Date: Friday, June 13, 2008, 11:18 AM
> > On Fri, 2008-06-13 at 16:38 +0530, padmaja venkata wrote:
> > > Hi,
> > >
> > > Thanks for the reply. I, however, use only one proxy
> > and that single proxy
> > > has inserted 3 via headers of its own. Please see the
> > Invite from the UA and
> > > the corresponding Invite forwarded by the proxy below.
> > My question again is-
> > > Is it OK to have more than one Via headers inserted by
> > a single proxy? Is it
> > > defined in RFC?
> >
> > Yes, it's ok.  The proxy in question 'spiraled'
> > the request (sent the
> > request through itself) in the course of processing it.
> >
> >
> > _______________________________________________
> > Sip-implementors mailing list
> > [email protected]
> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>
>
>
>
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