Re: [multimob] Working group last call for draft-ietf-multimob-fmipv6-pfmipv6-multicast-05

Stig Venaas <stig@venaas.com> Thu, 03 April 2014 21:15 UTC

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Date: Thu, 03 Apr 2014 14:15:00 -0700
From: Stig Venaas <stig@venaas.com>
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To: "Thomas C. Schmidt" <schmidt@informatik.haw-hamburg.de>, Dirk.von-Hugo@telekom.de, multimob@ietf.org
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Subject: Re: [multimob] Working group last call for draft-ietf-multimob-fmipv6-pfmipv6-multicast-05
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Hi

On 3/31/2014 2:57 PM, Thomas C. Schmidt wrote:
> Hi Dirk,
>
> many thanks for carefully looking through the draft. Please see comments
> inline.
>
> On 27.03.2014 16:30, Dirk.von-Hugo@telekom.de wrote:
>
>> Sorry that I missed the preceding WGLC - I do think that this document
>> is ready for publication. It has greatly improved since version 00 ;-)
>>
>> Though some (minor) nits came to my mind after re-reading:
>>
>> p.1.
>> Updates: 5568 (if approved) => shouldn't be added 5949 since it does
>> also update PFMIPv6?
>>
>
> I don't think so. The update of 5568 is with the PrRtAdv-Messages. 5949
> does not contain such things, as there is no explicit messaging between
> MAGs and the MN. Mobility Options are explicitly under the control of IANA.
>
>> As mentioned by others for prior versions there is still mixed usage
>> of FBack, Hack, ... and FBACK, HACK, ...
>> Same for PMAG/NMAG and pMAG/nMAG.
>>
>
> Oh yes, that was in the figures ...
>
>> p.10ff
>> "Section 3.3.  Protocol Operations Specific to PFMIPv6" and Figs. 4/5
>> do include "PMAG (PAR)" and "NMAG (NAR)" - isn't it all about PMIP -
>> so no relevance for AR? Otherwise I would expect a statement like that
>> also a mixed scenario MIP/PMIP is in focus here ...
>> I tried to find out whether this was explained in prior posts but
>> didn't catch any ... sorry if I missed it!
>>
>
> Actually the terms PAR and NAR in parenthesis are used to indicate the
> correspondence with FMIP ... it does not consider mixed terms, but
> should help the reader to see that this is all about the same "abstract
> entities" here.
>
>> p.15
>> sect. 4.1.3 is on NAR, so I guess:
>> of the PAR => of the NAR
>>
>
> Yes, thanks.
>
>> the NAR joins the groups subscribed
>>     for forwarding on the tunnel link. < sounds puzzling to me
>> => the NAR joins the groups the MN has subscribed
>>     for (which are then forwarded by PAR) via the tunnel link. < is it
>> that what is meant?
>>
>
> Yes, thanks. This is better.
>
>> p.21
>> number of muticast records => number of multicast records
>>
>
> Thanks, fixed.
>
>> or Section 4.2 of [RFC3376]) for the => or Section 4.2 of [RFC3376]
>> for the
>>
>
> Thanks, fixed.
>
>> p.23
>> 5.5.  Length Considerations: Number of Records and Addresses
>> I understand why the maximum number of multicast address records is 72
>> or sources for MLDv2 is 89 (also given in
>> http://tools.ietf.org/html/rfc3810#section-5.1.10), but I miss a
>> consideration of specific limitation due to 8-bit Length format in new
>> Mobility Header Multicast Option (Fig.7).
>> Have I misunderstood something or isn't there a much stricter limit
>> for multicast address records to (512-2-4)/(4+16) < 26 (w/o source
>> addresses) ??
>>
>
> I guess you hit a point: By bringing back length formatting to standard
> mobility options recently, we missed that this will not fill an Ethernet
> packet. I don't think this matters much, but we definitely should adjust
> the section on length considerations.
>
>> for that multicast address to their MLDv2 (IGMPv2) equivalents
>> => for that multicast address to their MLDv2 (IGMPv3) equivalents
>>
>
> Thanks, fixed.
>
>> Hope this helps
>
> Yes, it definitely does.
>
> We will wait for the next days to pass the call deadline and resubmit then.

Thanks. Looks like these are the only outstanding issues. Thanks for
having a careful look Dirk.

Once you submit the new version I'll allow a couple of days for myself
and others to review changes. If they look good I'll request publishing.

If others have any issues, please let us know, even if passed the WGLC
deadline.

Stig

> Thanks again & best regards,
>
> Thomas
>
>
>>   -----Original Message-----
>> From: multimob [mailto:multimob-bounces@ietf.org] On Behalf Of Stig
>> Venaas
>> Sent: Montag, 24. März 2014 21:30
>> To: multimob@ietf.org
>> Subject: [multimob] Working group last call for
>> draft-ietf-multimob-fmipv6-pfmipv6-multicast-05
>>
>> This is a working group last call for
>> draft-ietf-multimob-fmipv6-pfmipv6-multicast-05
>>
>> Please state whether you think it is ready for publishing or if you
>> believe there are issues with the document or that it is not ready for
>> other reasons.
>>
>> The document has already been reviewed by several people, but it is
>> still good to hear from the working group what you think.
>>
>> The last call ends one week from now on Monday March 31st.
>>
>> The draft is available at
>> http://tools.ietf.org/html/draft-ietf-multimob-fmipv6-pfmipv6-multicast-05
>>
>>
>> Stig
>>
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