Re: IID length text

Behcet Sarikaya <sarikaya2012@gmail.com> Mon, 16 January 2017 20:42 UTC

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From: Behcet Sarikaya <sarikaya2012@gmail.com>
Date: Mon, 16 Jan 2017 14:42:30 -0600
Message-ID: <CAC8QAccN_=x9sTgTM71XFSYfUmSyaMHw_tFEw2QSr5iwi2wcGw@mail.gmail.com>
Subject: Re: IID length text
To: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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On Mon, Jan 16, 2017 at 2:27 PM, Alexandre Petrescu
<alexandru.petrescu@gmail.com> wrote:
> Le 14/01/2017 à 20:49, Brian E Carpenter a écrit :
>>
>> A modest suggestion:
>>
>> OLD
>>    For all unicast addresses, except those that start with the binary
>>    value 000, Interface IDs are required to be 64 bits long.  Background
>>    on the 64 bit boundary in IPv6 addresses can be found in [RFC7421].
>>
>> NEW
>>    IPv6 routing is based on prefixes of any valid length up to 128
>> [BCP198].
>>    For example, [RFC6164] standardises 127 bit  prefixes on point-to-point
>>    links. However, consistent use of Stateless Address Autoconfiguration
>>    (SLAAC)[RFC4862] requires that all interfaces on a link use the same
>> length
>>    of Interface ID. In practice, this means that to guarantee
>> interoperability
>>    of SLAAC, a fixed length of Interface ID is necessary. For all
>> currently
>>    allocated unicast addresses, except those that start with the binary
>>    value 000, that length is 64 bits. Note that this value is an arbitrary
>>    choice and might be changed for some future allocation of unicast
>> address
>>    space. Background on the 64 bit boundary in IPv6 addresses can be found
>>    in [RFC7421].
>
>
> I agree with the change suggestion.  The new text and references are enough
> motivation to clarify that that 64bit limit is an arbitrary choice and might
> change in the future.
>

3GPP assigns 64 bit prefixes to each UE.
Extended Unique Identifiers defined are EUI-48 and EUI-64.
I don't think 64 bit limit is that arbitrary?

Behcet

> Alex
>
>>
>> Regards
>>    Brian
>>
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