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Re: [irtf-discuss] Why do we need to go with 128 bits address space ?

Roland Bless <roland.bless@kit.edu> Fri, 16 August 2019 06:02 UTC

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Subject: Re: [irtf-discuss] Why do we need to go with 128 bits address space ?
To: Fernando Gont <fgont@si6networks.com>, shyam bandyopadhyay <shyamb66@gmail.com>, ietf@ietf.org
Cc: irtf-discuss@irtf.org, 6man@ietf.org
References: <CAPTMOt+cGhBqHmT3yZVChv-PCMqxT-WPDcDdM3RuTc1TMfFeVg@mail.gmail.com> <cd254463-43ba-2afd-5c3c-f462a74e5c30@kit.edu> <374d84e5-e20a-e89f-d235-703581db1f00@si6networks.com>
From: Roland Bless <roland.bless@kit.edu>
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Organization: Institute of Telematics, Karlsruhe Institute of Technology (KIT)
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Date: Fri, 16 Aug 2019 08:02:51 +0200
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Hi Fernando,

see below.

On 15.08.19 at 20:13 Fernando Gont wrote:
> On 15/8/19 12:27, Roland Bless wrote:
> [....]
>> c) given the increasing number of virtual machines and IoT devices 64
>> bit isn't sufficient, see also the discussion of new MAC address lengths
> [...]
> 
> The MAC addresses should have never been embedded in the IID. In fact,
> that's no longer the recommended way to generate IPv6 IIDs. See RFC8064.

I guess you misinterpreted my statement, since I
was not referring to modified EUI64s or IIDs at all and I'm fully aware
of the RFC.
This was just to point to IEEE work on extending the MAC address space,
showing the need for larger addresses and that 64-bit aren't obviously
sufficient, see e.g.,
https://www.ietf.org/proceedings/96/slides/slides-96-edu-ieee802work-0.pdf

Regards
 Roland

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