Re: Objection to draft-ietf-6man-rfc4291bis-07.txt

Alexandre Petrescu <alexandre.petrescu@gmail.com> Tue, 28 March 2017 01:16 UTC

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Subject: Re: Objection to draft-ietf-6man-rfc4291bis-07.txt
To: 神明達哉 <jinmei@wide.ad.jp>
References: <20170223134026.GI5069@gir.theapt.org> <CAN-Dau0n6oFm538XdJOcuO1yg92BCDD3mBu5YfBVm_+g-gtcKA@mail.gmail.com> <CAL9jLaYO=uYgVfSZ0SoSe0SujJ1xgwEKE8WLzo_keJHywgXTtg@mail.gmail.com> <CAN-Dau1vJV5O_Ythp6THkAu4-YZXV82Upny1V+ybbjCVZQQX=A@mail.gmail.com> <27cce319-18ac-5c0e-3497-af92344f0062@gmail.com> <de4988be-6031-08d9-84ce-21c3fa4f9bc9@gmail.com> <98401ef7-cf41-b4a0-4d11-a7d840181bd0@gmail.com> <1047f5fc-ae40-be52-6bab-27f31fe5e045@gmail.com> <9a94feac-8d59-b153-d41c-04fc371e4db4@gmail.com> <CAO42Z2z7v4gDk91b6Of-1sczV88m3B9kzn0MeJU_VBJ416k6Ww@mail.gmail.com> <ae35b45a-0398-840f-fc0d-1f64dd2fcc58@gmail.com> <CAJE_bqdZezDRti5LqCKnmU9QkwwhdejP22gXwk3wLKiS0mhx+Q@mail.gmail.com> <dfc8570d-fff0-39fe-a53f-db2c81c0ec8f@gmail.com> <CAJE_bqdHv0vw_kFFBZ2NE98t0nhkCR5rz8f=UOpwmvqtVjNqhg@mail.gmail.com> <d7c50847-47b4-48a7-d2c4-7b207898c84b@gmail.com> <CAJE_bqdzZ6VBCN_+FvX6Np=21PuuPCFX3mOuZ6MVQd=zj7aE5A@mail.gmail.com> <CAJE_bqfD_wkSgR1XBWSFXeVxZ+Qx+ai2qKoND89NW__m6yG2YQ@mail.gmail.com>
Cc: 6man WG <ipv6@ietf.org>
From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Mon, 27 Mar 2017 20:16:09 -0500
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Le 27/03/2017 à 19:53, 神明達哉 a écrit :
> On Mon, Mar 27, 2017 at 5:50 PM <jinmei@wide.ad.jp> wrote:
>
>>>> fe81::/10 is just an "abnormal" form of fe80::/10,
>>>
>>> Err, I dont think fe81::/10 is an abnormal LL.  I think fe81::/10,
>>> fe82::/10, ... febf::/10 are all normal forms of LL.
>>
>> By abnormal I meant setting the tenth bit is meaningless
>
> Oops, it should be "the 16th bit".  Sorry for the noise.

Well, I agree setting the 16th bit can be meaningless, because it is 
beyond the first hextet.

fe80:1::/10 is too long, because that "1" is way beyond the 10th bit.

But fe81::/10 is not meaningless.

fe80::/10 is not more meaningful than fe81::/10.

Actually one can wonder why RFC writers decided to write fe80::/10 when 
they could have written fe81::/10 equaly well.  Or even fe90::/10 or 
febf::/10.  All these designate the same 10bits - the mask 1111 1110 10.

Alex

>
> --
> JINMEI, Tatuya
>