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Re: [v6ops] Last Call: <draft-ietf-v6ops-unique-ipv6-prefix-per-host-03.txt> (Unique IPv6 Prefix Per Host) to Best Current Practice

Alexandre Petrescu <alexandru.petrescu@gmail.com> Tue, 30 May 2017 08:14 UTC

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From: Alexandre Petrescu <alexandru.petrescu@gmail.com>
X-Google-Original-From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
To: Lorenzo Colitti <lorenzo@google.com>, "Brian E. Carpenter" <brian.e.carpenter@gmail.com>
References: <149556850339.28443.2716896366216678645.idtracker@ietfa.amsl.com> <fa82ceef-7cd6-ab37-aee6-f386266b5c56@gmail.com> <CAKD1Yr1kG2zCJ+qrap=Th9TP-uPi-eHmP8y=p-MWjsTYfuCrHw@mail.gmail.com>
Cc: "v6ops@ietf.org WG" <v6ops@ietf.org>, draft-ietf-v6ops-unique-ipv6-prefix-per-host.all@ietf.org, v6ops-chairs@ietf.org, IETF Discussion <ietf@ietf.org>
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Date: Tue, 30 May 2017 11:14:36 +0300
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Subject: Re: [v6ops] Last Call: <draft-ietf-v6ops-unique-ipv6-prefix-per-host-03.txt> (Unique IPv6 Prefix Per Host) to Best Current Practice
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Le 27/05/2017 à 06:24, Lorenzo Colitti a écrit :
> On 26 May 2017 13:24, "Brian E Carpenter"
> <brian.e.carpenter@gmail.com <mailto:brian.e.carpenter@gmail.com>>
> wrote:
>
>> So the draft shouldn't assume a particular prefix length either. We
>> all know that it's usually 64 today, but that doesn't affect the
>> argument made by the draft.
>
>
> It's always /64 for all addresses starting with binary 000, which
> cannot be assigned to hosts in a real network because they are
> unallocated space.
>
>> We need consistency with RFC 7608 (BCP 198).
>
>
> No, we don't. RFC 7608 is about forwarding, not address assignment.

But forwarded packets reach assigned addresses.

Some situations can be unfortunate, such as forwarding a /65 to an 
address containing a 64bit IID.

Consistency is desirable.

Alex

>
>
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