Re: Updated IID length text

Lorenzo Colitti <lorenzo@google.com> Thu, 19 January 2017 09:49 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 19 Jan 2017 18:49:10 +0900
Message-ID: <CAKD1Yr1aYMUXuxewWmr8+e_r7TuuP9VMVarxGuxtbsA1rwJF8Q@mail.gmail.com>
Subject: Re: Updated IID length text
To: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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On Thu, Jan 19, 2017 at 6:26 PM, Alexandre Petrescu <
alexandru.petrescu@gmail.com> wrote:

> If IIDs are required to be 64bit long (even if only in the 000-prefixed
> space) then the network can not grow at the edges, at least not with
> SLAAC.
>
> The network can not grow at the edges with SLAAC because the operators
> are already at this limit; they imagine no-one needs to grow beyond it.
>  They also imagine that a 2^64 is enough for an end user, w/o
> understanding that /64 is but one subnet (because of SLAAC).
>

There are lots of things that you can do with one /64. For example, you can
bridge at layer 2 and connect as many devices as you want.