Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard

Alexandre Petrescu <alexandre.petrescu@gmail.com> Mon, 20 February 2017 10:07 UTC

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Subject: Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard
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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Mon, 20 Feb 2017 11:06:51 +0100
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Hi Sander,

Thank you for clarification.

Le 19/02/2017 à 22:48, Sander Steffann a écrit :
[...]

> while also protecting users so that ISPs don't start delegating them
>  /96s "because it's more than enough and the RFC allows it" etc.

I agree.  An ISP delegating a /96 to an end-user is probably too long a
prefix for SLAAC/Ethernet to work.

In that sense, the ISP should be told to allocate at least a /63 (not a
/64) because of same SLAAC/Ethernet allowing only _one_ subnet if /64,
and allowing no subnet at all if /96.

But, AFAIK nobody could persuade a cellular ISP to provide a /63
rather than a /64 to UE.

Which brings back the question of why /64.

Alex

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