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Re: IPv6 Routing & ND vs. Addressing, (Was: Re: <draft-ietf-6man-rfc4291bis-09.txt>)

Mark Smith <markzzzsmith@gmail.com> Thu, 13 July 2017 01:48 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Thu, 13 Jul 2017 11:48:13 +1000
Message-ID: <CAO42Z2xTupYDEie8SidV19=E-dQONBRzLhgGhULbpCic8kHMMA@mail.gmail.com>
Subject: Re: IPv6 Routing & ND vs. Addressing, (Was: Re: <draft-ietf-6man-rfc4291bis-09.txt>)
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: 6man WG <ipv6@ietf.org>
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On 13 July 2017 at 11:42, Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
> On 13/07/2017 06:32, Manfredi, Albert E wrote:
> ...
>> Of course, the other option is to expand using ULAs, but then, that's "so IPv4."
>
> Not. ULA doesn't imply NAT. It just implies private addresses.
> I think keeping the addresses of my light switches private and not
> globally reachable is a wonderful idea. My lighting controller
> might be accessible via a global address, and would hopefully have
> much better security than the individual lightswitches.
>

Agree. ULAs is not "so IPv4".

I know of at least two AMI Smartmeter networks with well over 300K
meters attached that are using IPv6 and ULAs. They don't need global
reachability to or from the Internet, so they don't need GUA addresses
(and they're certainly not getting Internet reachability via NAT66
either).

Regards,
Mark.

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