Re: [Softwires] Call for reviewersdraft-ietf-softwire-mesh-multicast

Behcet Sarikaya <sarikaya2012@gmail.com> Tue, 26 April 2016 16:52 UTC

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Date: Tue, 26 Apr 2016 11:36:01 -0500
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From: Behcet Sarikaya <sarikaya2012@gmail.com>
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Subject: Re: [Softwires] Call for reviewersdraft-ietf-softwire-mesh-multicast
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On Mon, Apr 25, 2016 at 9:42 PM, 杨术 <yang.shu@sz.tsinghua.edu.cn> wrote:
> Hi, Dear Mohamed,
>
> Thank for you advices!
>
>> * This draft covers two cases: IPv4-over-IPv6 and IPv6-over-IPv4. I see a potential overlap with draft-ietf-softwire-dslite-multicast (that passed the WGLC) for the IPv4-over-IPv6 case.
> Our draft focus on the mesh 4over6 case mentioned in rfc 4925. The "hub and spoke" scenario is different with the ds-lite 4over6 case in rfc 6333.


This seems to be correct.
This draft is based on what I call weird definition of mesh problem in
RFC 4925. I don't think it was followed up much afterwards.
If we look back, I think this draft has taken up the precious
multicast space and as a result, no space was left for much more
important edge multicast transition protocols.
Sigh.

Regards,

Behcet
>
>> * The following section points to RFC7371. I think the authors meant https://tools.ietf.org/html/draft-ietf-mboned-64-multicast-address-format-06.
> We will update the references.
>
> Shu Yang
>
>
>> -------------------------------------------------------------
>> 发件人:mohamed.boucadair
>> 发送日期:2016-04-25 16:27:33
>> 收件人:Ian Farrer; softwires@ietf.org
>> 抄送:
>> 主题:Re: [Softwires] Call for reviewersdraft-ietf-softwire-mesh-multicast
>>
>> Hi Ian, all,
>>
>> I have the following comments about this draft:
>>
>> * This draft covers two cases: IPv4-over-IPv6 and IPv6-over-IPv4. I see a potential overlap with draft-ietf-softwire-dslite-multicast (that passed the WGLC) for the IPv4-over-IPv6 case. Unless there are some differences between these two documents for this case, I suggest to scope draft-ietf-softwire-mesh-multicast to focus on the IPv6-over-IPv4 and add a pointer to draft-ietf-softwire-dslite-multicast. Otherwise, it would be helpful to identify the differences between the two documents.
>>
>> * The following section points to RFC7371. I think the authors meant https://tools.ietf.org/html/draft-ietf-mboned-64-multicast-address-format-06.
>>
>> ==
>> 4.2.  Group Address Mapping
>>
>>    For IPv4-over-IPv6 scenario, a simple algorithmic mapping between
>>    IPv4 multicast group addresses and IPv6 group addresses is supported.
>>    [RFC7371] has already defined an applicable format.  Figure 4 is the
>>    reminder of the format:
>>
>>
>>      +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
>>      | 0-------------32--40--48--56--64--72--80--88--96-----------127|
>>      +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
>>      |                    MPREFIX64                  |group  address |
>>      +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
>>
>>
>>            Figure 4: IPv4-Embedded IPv6 Multicast Address Format
>>
>>    The MPREFIX64 for SSM mode is also defined in [RFC7371] :
>>
>>    o  ff3x:0:8000::/96 ('x' is any valid scope)
>> ==
>>
>> Thank you.
>>
>> Cheers,
>> Med
>>
>> > -----Message d'origine-----
>> > De : Softwires [mailto:softwires-bounces@ietf.org] De la part de Ian
>> > Farrer
>> > Envoyé : jeudi 7 avril 2016 16:59
>> > À : softwires@ietf.org
>> > Objet : [Softwires] Call for reviewers draft-ietf-softwire-mesh-multicast
>> >
>> > Hi,
>> >
>> > This document has been around for some time, but has not received any
>> > substantive reviews. Can I ask for volunteers who are willing to provide
>> > reviews?
>> >
>> > Thanks,
>> > Ian
>> >
>> >
>> > _______________________________________________
>> > Softwires mailing list
>> > Softwires@ietf.org
>> > https://www.ietf.org/mailman/listinfo/softwires
>>
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>
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