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Re: [v6ops] Turning on IPv6 Routers

George Michaelson <ggm@algebras.org> Fri, 21 July 2017 13:00 UTC

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From: George Michaelson <ggm@algebras.org>
Date: Fri, 21 Jul 2017 15:00:20 +0200
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To: Tim Chown <Tim.Chown@jisc.ac.uk>
Cc: Michael Richardson <mcr+ietf@sandelman.ca>, IPv6 Ops WG <v6ops@ietf.org>, 6man WG <ipv6@ietf.org>
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Subject: Re: [v6ops] Turning on IPv6 Routers
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Somebody muttered to me that bridge mode means customer devices
'inside' the demarc present their identity to the BNG demanding some
V6 love, which makes accountants very unhappy because they were using
that CPE identity as a billing cycle token.

So bridge mode, which we all love, can be a bit of a pain, if you
decided to use something clever in IID.

On Fri, Jul 21, 2017 at 1:53 PM, Tim Chown <Tim.Chown@jisc.ac.uk> wrote:
>> On 21 Jul 2017, at 12:24, Michael Richardson <mcr+ietf@sandelman.ca> wrote:
>>
>> Fred Baker <fredbaker.ietf@gmail.com> wrote:
>>> Note that this is not as simple as it might sound. There are at least
>>> three configurations that must be allowed for upstream: bridging the
>>> ISP downstream and CPE downstream LANs, Address allocation via DHCP
>>> IA_NA, and address allocation via SLAAC, and on the CPE downstream
>>> LAN(s), address allocation via DHCP IA_NA and SLAAC. BBF TR-124 gives a
>>> flowchart for this or RFC 7084 defines the algorithms. The
>>> implementation is going to have to enable all three, see which works,
>>> and act accordingly.
>>
>> As an implementer of a PPPoE aggregator/access-router, I found that I
>> had to invert 7084 to determine what I had to implement.
>>
>> It might be worth a document, if only so that ISPs would have something
>> against which to issue RFPs.  Maybe.
>
> The question for 6434bis and perhaps 7084bis if it happens is what wording to put in.
>
> Turning on IPv6 in a tested ISP’s provided CPE is a different matter to a “random” device, which may or may not be certified against the IPv6 Ready program for 7084 compliance.
>
> I’m not sure if the following is the current test scenario spec (last updated Jan 2016), but it lists the CE tests that that IPv6 Ready program includes, including 7084:
> https://www.iol.unh.edu/sites/default/files/testsuites/hnc/ipv6_ready_test_specification_ce_router_conformance.pdf
>
> Tim
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