Re: Review of draft-ietf-6man-rfc4291bis-06

Fernando Gont <fgont@si6networks.com> Fri, 13 January 2017 19:46 UTC

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Subject: Re: Review of draft-ietf-6man-rfc4291bis-06
To: Suresh Krishnan <suresh.krishnan@gmail.com>, Randy Bush <randy@psg.com>
References: <148406593094.22166.2894840062954191477.idtracker@ietfa.amsl.com> <m2fukqbbwv.wl-randy@psg.com> <F6953234-3F85-4E28-9861-433ADD01A490@gmail.com> <m2wpdzhncn.wl-randy@psg.com> <CAN-Dau0Z6aYhitOw8oJ_JQo9N_hzK6yzMe3VosZ7Ch6iV_uaxw@mail.gmail.com> <m2eg07hji4.wl-randy@psg.com> <CA+MHpBq-wvJSGBide1D1zhVvqVGO7+9DDMJ3LLBpsd6VFL16Cg@mail.gmail.com>
From: Fernando Gont <fgont@si6networks.com>
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Date: Fri, 13 Jan 2017 16:45:49 -0300
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On 01/13/2017 12:55 AM, Suresh Krishnan wrote:
> Hi Randy,
> 
> On Thu, Jan 12, 2017 at 7:49 PM, Randy Bush <randy@psg.com> wrote:
>>>> to be clear, i have no problem with iids being 64-bit.  my issue is with
>>>> unicast globals being classful in 2.4.4.
>>> Randy I take your point, but this supposed conflict isn't new, it's not
>>> introduced in 4291bis, it goes back to RFC3513.
>>
>> i know; and i have pushed back every cm of the way.  it took years to
>> get the other classful insanity, tls/nla, removed.  the old cidr war
>> continues.  this last bit of classfulness (excuse the word) too will
>> pass.
>>
>>> Do you have a suggestion how to change this within the context of
>>> advancing this to Internet Standard?
>>
>> yes.  simply remove the mandatory requirement for classful global
>> unicast addresses.
> 
> I do see your point but I do not feel it is equivalent to classful
> addressing in IPv4. i.e. Looking at the leading X bits does not
> directly determine the IID length.

Isn't that the case for the address block we're currently employing? -
the IID is defined to be 64 bits.


-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
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