Re: A proposal for draft-ietf-6man-rfc4291bis-07

David Farmer <farmer@umn.edu> Fri, 03 March 2017 01:55 UTC

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From: David Farmer <farmer@umn.edu>
Date: Thu, 2 Mar 2017 19:55:42 -0600
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Subject: Re: A proposal for draft-ietf-6man-rfc4291bis-07
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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On Thu, Mar 2, 2017 at 7:29 PM, Brian E Carpenter <
brian.e.carpenter@gmail.com>; wrote:

> On 03/03/2017 13:34, Manfredi, Albert E wrote:
> > From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of David Farmer
> >
> >> 3. IIDs are REQUIRED to be 64 bits
> >
> > I think that RFC 4291 bis should not retain a constraint that has been
> applied so far, out of convenience, in the earliest stages of IPv6
> deployment.
>
> Agreed. And I think there are actually two things to say here:
>
> 3.1. Any IPv6-over-foo spec must specify a recommended IID length.
> 3.2. In the absence of such a spec, the recommended IID length is 64 bits.
>
> Again, that breaks no running code, and it respects the architectural
> statement that prefix_length + IID_length == 128, and the use of CIDR
> routing and variable-length subnet masks.
>
>     Brian
>

I'd be fine with that, but others seem to feel otherwise. Lorenzo and James?

Thanks

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