Re: [MBONED] APPSDIR review of draft-ietf-mboned-64-multicast-address-format-01
Jacni Qin <jacni@jacni.com> Wed, 16 May 2012 01:20 UTC
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Date: Wed, 16 May 2012 09:20:41 +0800
From: Jacni Qin <jacni@jacni.com>
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To: "Lee, Yiu" <Yiu_Lee@Cable.Comcast.com>
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Cc: "6man@ietf.org" <6man@ietf.org>, "apps-discuss@ietf.org application-layer protocols" <apps-discuss@ietf.org>, "draft-ietf-mboned-64-multicast-address-format.all@tools.ietf.org" <draft-ietf-mboned-64-multicast-address-format.all@tools.ietf.org>, Stig Venaas <stig@cisco.com>, The IESG <iesg@ietf.org>, "mboned@ietf.org" <mboned@ietf.org>
Subject: Re: [MBONED] APPSDIR review of draft-ietf-mboned-64-multicast-address-format-01
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Re-, On 5/15/2012 Tuesday 5:06 AM, Lee, Yiu wrote: > Hi Stig, > > Right. I explain only one use case. Other may find the latter case is more > attractive for their deployments. This address format should enable the > dynamic use case as well. Yes, imaging the coexistence of the native provisioning and the embedded address for some transition approach deployment, to perform that statelessly, a flag bit is efficient. Cheers, Jacni > Yiu > > On 5/14/12 4:56 PM, "Stig Venaas"<stig@cisco.com> wrote: > >> On 5/14/2012 1:50 PM, Lee, Yiu wrote: >>> Hi Brian, >>> >>> Sorry for getting back late. I read Bert's answers to your questions. >>> His >>> answers are inline with my answers. Most information are statically >>> configured. For example: Ch1 is statically configured to 224.1.2.3 via >>> OOB >>> mechanism. If the STB is IPv4 only, it will only use IPv4 mcast address. >>> It won't use the address format defined in this draft. In my mind, the >>> most common deployment will use the same IPv6 prefix which will be >>> statically configured in the AF. >> Right, so that was my main concern with the draft. Is static >> configuration like this sufficient, or are there more generic cases >> where one needs to know that it is translated from IPv4 without a >> priori configuration. The flag bit (or a well-known prefix) is only >> needed in the latter case. I know there were some scenarios where >> someone found the latter to be advantageous though. >> >> Stig >> >>> Regards, >>> Yiu >>> >>> >>> On 5/10/12 2:03 PM, "Brian Haberman"<brian@innovationslab.net> wrote: >>> >>>> 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? >>>> >>>>> 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 >> >> >> _______________________________________________ >> MBONED mailing list >> MBONED@ietf.org >> https://www.ietf.org/mailman/listinfo/mboned
- [MBONED] APPSDIR review of draft-ietf-mboned-64-m… Carsten Bormann
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… mohamed.boucadair
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Carsten Bormann
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Tina TSOU
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Lee, Yiu
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Jacni Qin
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… mohamed.boucadair
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Carsten Bormann
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… mohamed.boucadair
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Simon Perreault
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Brian Haberman
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Manfredi, Albert E
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Tina TSOU
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… mohamed.boucadair
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Lee, Yiu
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Stig Venaas
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Lee, Yiu
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Behcet Sarikaya
- Re: [MBONED] APPSDIR review of draft-ietf-mboned-… Jacni Qin