Re: [Sip] Question on draft-ietf-sip-outbound-20 draft: multipleflowcreation

["Scott Lawrence" <scott.lawrence at nortel.com>]

On Mon, 2009-08-31 at 12:31 -0400, Scott Lawrence wrote:
> On Mon, 2009-08-31 at 22:33 +0800, Vavilapalli Srikanth-A19563 wrote:
> > True, UDP flow may not be required if TCP flow has been setup to route
> > incoming traffic towards UA. But Won't it be an additional bonus if UA
> > creates a UDP FLOW in addition to TCP FLOW, so that network can still
> > reach the UA over the other transport FLOW when one FLOW is down
> > (Unless if both FLOWs got created with same host and all the FLOWs
> > connected to that host is down)? 
> >  
> > Also assume a UA has some local policy to prefer UDP transport over
> > TCP to transmit the outgoing SIP messages of size less than MTU. In
> > such scenarios, UA might want to establish both UDP and TCP FLOWs with
> > the same edge proxy and keep alive both the connections and use the
> > corresponding FLOW based on DNS lookup preferences and User's local
> > policy preferences to transport outgoing messages.
> 
> That would not be a very sensible proxy if the phone is behind a NAT and
> supports TCP.  

s/proxy/policy/