RE: Updated IID length text

Hi Alex,

> -----Original Message-----
> From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Alexandre Petrescu
> Sent: Thursday, January 19, 2017 1:57 PM
> To: ipv6@ietf.org
> Subject: Re: Updated IID length text
> 
> 
> 
> Le 19/01/2017 à 20:26, Brian E Carpenter a écrit :
> > On 19/01/2017 22:26, Alexandre Petrescu wrote: ...
> >> I do not agree with the part that says "IIDs are required be 64bit
> >> long".
> >
> > But they are, today. In the move to full Standard, we cannot actually
> > change that; we can only clarify the wording.
> >
> >> 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.
> >
> > That would be true if /64 prefixes were scarce. They are not.
> 
> The mobile network operators today make it look as if the /64
> prefixes were scarce.
> 
> Maybe they dont know these /64 are not scarce, or maybe they dont care
> about scarcity (just as it's not IPv4 scarcity making them deploy IPv6).
>   The end result is the same: end users get each a /64, i.e. one single
> subnet.
> 
> Spec-wise the IID len cant change, the Ethernet IID len cant change, the
> DHCPv6 PD is not deployed, the operators only give a /64 to end user...
> one is free to pick the reason, and again the end result is the same: no
> growth at the edge.

I have deployed DHCPv6 PD in my network, and use it all the time for
mobile devices.

Thanks - Fred

> The archi document is free to recognize reality.  If so, it should
> recognize it so in a paragraph: no growth at the edges.
> 
> Alex
> 
> > But that's why the proposed text is limited to currently allocated
> > unicast space - if we ever need to change this, it will be a new
> > tranche of unicast space. In any case, this is nothing to do with
> > progressing to full Standard.
> >
> > Brian
> >
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