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Re: [v6ops] A common problem with SLAAC in "renumbering" scenarios

Christian Huitema <huitema@huitema.net> Fri, 22 February 2019 07:45 UTC

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To: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>, Tom Herbert <tom@herbertland.com>, Mark Smith <markzzzsmith@gmail.com>
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From: Christian Huitema <huitema@huitema.net>
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Date: Thu, 21 Feb 2019 23:44:52 -0800
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Subject: Re: [v6ops] A common problem with SLAAC in "renumbering" scenarios
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Debating the beauty of NAT on an IPv6 list is surely good fun for some,
but could we get some progress on the original issue, which could be
summed up as a "bug in SLAAC"? Fernando filed that bug 3 weeks ago, I
saw hundreds of messages on the mailing list, but I did not see much
progress.

Do we agree that this is indeed a bug, or do we think that having users
disconnected from the Internet after a home router reboots is just a
desirable feature of IPv6?

Do we agree that it would be good if routers that reboot could just
reacquire the same prefix from DHCPv6 PD? Do we also agree that there
will always be a significant fraction of deployment in which that won't
be possible?

Do we agree that the working group should actually start working on some
improvement in SLAAC that would mitigate the issue? Not excluding of
course solutions that would also mitigate related egress filtering issue?

-- Christian Huitema

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