Re: [MBONED] draft-ietf-mboned-64-multicast-address-format-03.txt

[Brian Haberman <[e-mail]>]

Why does T need to be 1?

Brian

On 8/14/12 5:43 PM, Lee, Yiu wrote:
> Hi Stig,
>
> Since we want T=1, this will not meet the "well-known" requirement defined
> in RFC4291. If we don't want to define a flag, what is the proper way to
> describe ffxx:8000::/20 and ffxx:0:8000::/96?
>
> Thanks,
> Yiu
>
>
> On 8/13/12 7:18 PM, "Stig Venaas" <[e-mail]> wrote:
>
>> On 13.08.2012 14:46, Brian Haberman wrote:
>>> On 8/13/12 4:21 PM, Behcet Sarikaya wrote:
>>>> Hi authors,
>>>>
>>>> Thanks for the revised draft, I find that the revision is in the right
>>>> direction.
>>>>
>>>> I am confused on the prefix lengths:
>>>> on Figure 2,
>>>> ffxx:8000:0:abc::/96
>>>> while in Section 3.1
>>>> ffxx:8000::/20
>>>>
>>>
>>> The x's correspond to the flags and scope fields within the multicast
>>> address.  Take a look at:
>>>
>>>
>>> http://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-a
>>> ddresses.xml#ipv6-multicast-addresses-4
>>
>> We have one minor issue here though. They cannot simply be IANA
>> allocations, since they would not have the transient bit set. In
>> this case, the idea is that it should work for flag nibble values
>> like 1, 3 and 7. Actually I believe the transient bit should always
>> be set for these groups.
>>
>> Stig
>>
>>>
>>>
>>>> How come these are reserved prefixes?
>>>> What are the values that are reserved?
>>>>
>>>> If you look at RFC 6052, the unicast translation specification,
>>>> 64:ff9b::/96 is defined as the Well-Known Prefix. There are no x's in
>>>> the prefix definition.
>>>>
>>>> Regards,
>>>>
>>>> Behcet
>>>>
>>>> On Fri, Aug 10, 2012 at 1:49 AM,  <[e-mail]> wrote:
>>>>>
>>>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>>>> directories.
>>>>>    This draft is a work item of the MBONE Deployment Working Group of
>>>>> the IETF.
>>>>>
>>>>>           Title           : IPv6 Multicast Address With Embedded IPv4
>>>>> Multicast Address
>>>>>           Author(s)       : Mohamed Boucadair
>>>>>                             Jacni Qin
>>>>>                             Yiu L. Lee
>>>>>                             Stig Venaas
>>>>>                             Xing Li
>>>>>                             Mingwei Xu
>>>>>           Filename        :
>>>>> draft-ietf-mboned-64-multicast-address-format-03.txt
>>>>>           Pages           : 13
>>>>>           Date            : 2012-08-09
>>>>>
>>>>> Abstract:
>>>>>      This document reserves two IPv6 multicast prefixes to be used in
>>>>> the
>>>>>      context of IPv4-IPv6 interconnection.  The document specifies an
>>>>>      algorithmic translation of an IPv6 multicast address to a
>>>>>      corresponding IPv4 multicast address, and vice versa.  This
>>>>>      algorithmic translation can be used in both IPv4-IPv6 translation
>>>>> or
>>>>>      encapsulation schemes.
>>>>>
>>>>>
>>>>>
>>>>> The IETF datatracker status page for this draft is:
>>>>>
>>>>> https://datatracker.ietf.org/doc/draft-ietf-mboned-64-multicast-address
>>>>> -format
>>>>>
>>>>>
>>>>> There's also a htmlized version available at:
>>>>>
>>>>> http://tools.ietf.org/html/draft-ietf-mboned-64-multicast-address-forma
>>>>> t-03
>>>>>
>>>>>
>>>>> A diff from the previous version is available at:
>>>>>
>>>>> http://www.ietf.org/rfcdiff?url2=draft-ietf-mboned-64-multicast-address
>>>>> -format-03
>>>>>
>>>>>
>>>>>
>>>>> Internet-Drafts are also available by anonymous FTP at:
>>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>>
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