RE: [Sip] Ready for WGLC on SIPS draft? Any last thoughts on transport=tls?

["Francois Audet" <audet at nortel.com>]

Actually, now that I think of it, it may not be as bad as I tought.

If UAs are using sip-outbound with their proxies, it would handle the
vast majority of the links.

Between proxies, you would use DNS or static configuration normally.

Furthermore, between proxies, re-using of existing TCP/TLS may also be
done.

So maybe you are right.

> -----Original Message-----
> From: Audet, Francois (SC100:3055) 
> Sent: Wednesday, June 06, 2007 13:14
> To: Dean Willis; Juha Heinanen
> Cc: SIP IETF
> Subject: RE: [Sip] Ready for WGLC on SIPS draft? Any last 
> thoughts on transport=tls?
> 
> Sounds appealing, until you realize that in an environment 
> where TLS support is the exception and not the norm, you 
> would degrade the performance of the network significantly by 
> having lots of failed TLS connection attemps.
> 
> > -----Original Message-----
> > From: Dean Willis [mailto:dean.willis at softarmor.com]
> > Sent: Tuesday, June 05, 2007 23:52
> > To: Juha Heinanen
> > Cc: Audet, Francois (SC100:3055); SIP IETF
> > Subject: Re: [Sip] Ready for WGLC on SIPS draft? Any last 
> thoughts on 
> > transport=tls?
> > 
> > Juha Heinanen wrote:
> > > Francois Audet writes:
> > > 
> > >  > Later, in-dialog request will be sent on each hop reusing the 
> > > existing  > established connections (TLS or TCP) as per 
> current RFC
> > > 3261  > procedures.
> > > 
> > > what if established connection breaks for one reason or 
> another and 
> > > needs to be re-established for routing in-dialog request?
> > if there is
> > > no transport info in request route, how does the proxy know which 
> > > transport to use?
> > 
> > How about:
> > 
> > It always tries TLS first, and if that doesn't work it either
> > 1) falls back to something else or 2) gives up. The choice 
> between 1 
> > and 2 is made based on local policy.
> > 
> > --
> > Dean
> > 
> > 
> 
> 
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> 


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