Re: [AVT] Draft minutes from Chicago meeting

[Colin Perkins <csp at csperkins.org>]

On 31 Jul 2007, at 12:25, Magnus Westerlund wrote:
> Colin Perkins skrev:
> > RTP Keep Alive
> >    draft-ietf-avt-app-rtp-keepalive-00
> >    Xavier Marjou presented the draft on RTP keep alive. This draft  
> > gives a
> >    list of mechanisms used to keep alive NAT bindings, and details  
> > the pros
> >    and cons of each. Mechanisms surveyed include 0 byte UDP  
> > packet, RTCP
> >    multiplexed on the RTP port, STUN packets, RTP packets with  
> > incorrect
> >    version number, RTP packets with comfort noise, RTP packets  
> > with a no-op
> >    payload, and RTP packets with unknown payload type. Xavier  
> > asked if any
> >    other mechanism were known (perhaps RTSP transport of RTP), and  
> > if we
> >    want to recommend one mechanism.
> >    Magnus Westerlund noted that RTSP encapsulation of RTP is TCP- 
> > based, so
> >    the usual TCP keep alive mechanism will be used to maintain NAT  
> > bindings,
> >    out of the scope of this document. Jonathan Lennox noted that  
> > there are
> >    often codec specific keep alive mechanisms, in addition to  
> > comfort noise.
>
> I think I actually said that the RTSP session keep-alive over the  
> same TCP connection is what will keep it alive. In addition that  
> timeouts on TCP is much less of a problem.

Thanks - I'll fix and upload a revised version for the proceedings.

Cheers,
--
Colin Perkins
http://csperkins.org/



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