RE: [MBONED] APPSDIR review of draft-ietf-mboned-64-multicast-address-format-01

Tina


> -----Original Message-----
> From: mboned-bounces@ietf.org [mailto:mboned-bounces@ietf.org] On Behalf
> Of Brian Haberman
> Sent: Thursday, May 10, 2012 11:03 AM
> To: Lee, Yiu
> Cc: 6man@ietf.org; apps-discuss@ietf.org application-layer protocols;
> draft-ietf-mboned-64-multicast-address-format.all@tools.ietf.org; The IESG;
> mboned@ietf.org
> Subject: Re: [MBONED] APPSDIR review of draft-ietf-mboned-64-multicast-
> address-format-01
> 
> Hi Yiu,
>       Let me ask a few questions...
> 
> On 5/9/12 10:52 PM, Lee, Yiu wrote:
> > Hi Carsten,
> >
> > Thanks very much for reviewing the document. I just want to add a point
> to
> > your question about how applications decide when to use this multicast
> > address format. In fact, they don't. Imagine a use case where a legacy
> > IPv4 IP-TV receiver (an app) wants to join a channel which is
> broadcasted
> > in IPv6. The app will continue to send the igmp-join (say 224.1.2.3).
> 
> How does the IPv4 IP-TV know to join 224.1.2.3?
> 
> How is 224.1.2.3 advertised to the IPv4 IP-TV clients if the content is
> generated by an IPv6 source?  Does the source need to be configured to
> use one of these IPv4-in-IPv6 multicast addresses?
http://datatracker.ietf.org/doc/draft-tsou-mboned-multrans-addr-acquisition/
Hope it helps.
> 
> > There will be a function in the network which is statically configured
> > that when it receives a igmp-join, it would covert to a corresponding
> > mld-join. The IPv6 address in the join message will follow what is
> > described in this draft. This Adaptive Function is transparent to the
> > application and managed by the network.
> 
> Are you limiting this approach to only mapping at the IGMP/MLD protocols?
> 
> How does your Adaptive Function know which IPv6 multicast prefix to use
> when mapping the IPv4 multicast address in the IGMP Report message to MLD?
> 
> Regards,
> Brian
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