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Re: A common problem with SLAAC in "renumbering" scenarios

Fernando Gont <fgont@si6networks.com> Thu, 07 February 2019 04:14 UTC

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Subject: Re: A common problem with SLAAC in "renumbering" scenarios
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Nick Hilliard <nick@foobar.org>, Christian Huitema <huitema@huitema.net>
Cc: ipv6@ietf.org
References: <60fabe4b-fd76-4b35-08d3-09adce43dd71@si6networks.com> <m1gptWx-0000G3C@stereo.hq.phicoh.net> <69609C58-7205-4519-B17A-4FBC8AE2EA16@employees.org> <d40b41c3-ff1b-cab4-a8de-16692a78e8fd@go6.si> <D1E45CAD-08D0-43D4-90F7-C4DD44CB32C0@employees.org> <alpine.DEB.2.20.1902041330531.23912@uplift.swm.pp.se> <77ecf321-b46e-4f25-7f68-05b15714a99e@si6networks.com> <CAHL_VyDdHuEAc9UdeiRp9f+c0tdzyoLwPY1rJbZmbWAuq96Uuw@mail.gmail.com> <alpine.DEB.2.20.1902051127510.23912@uplift.swm.pp.se> <m1gqyJC-0000FkC@stereo.hq.phicoh.net> <CAO42Z2wKh-vXmv=dNmr6oEmGnw09ajrr2geYJ=H1DbSYSm=VuQ@mail.gmail.com> <m1gqzYT-0000F5C@stereo.hq.phicoh.net> <e8eabf0f-191a-a293-8051-35268a62a2bd@go6.si> <37ae87fb-93f5-4ec4-6e55-e35ce308f91c@asgard.org> <2aa19534-4856-f01d-8184-6c7ed125ca1b@go6.si> <9cdf8405-e777-6769-4d4f-f123c13a9456@asgard.org> <f4eaaf13-aff3-439f-4426-d32d3722abfe@huitema.net> <d714d577-74f8-6f1a-76a7-94811b615078@foobar.org> <81ab4307-efb8-c04e-7acb-a6f7f0ec839f@gmail.com>
From: Fernando Gont <fgont@si6networks.com>
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Date: Wed, 06 Feb 2019 23:46:28 -0300
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On 6/2/19 16:31, Brian E Carpenter wrote:
[....]
>> 3) pushing the smarts down to the host layer and detecting / monitoring 
>> whether any particular prefix is still valid
> 
> https://tools.ietf.org/html/rfc6059 ?

Not really. Actually, the tricky part in this case is that the network
-- from the host pov -- is the same.


> In any case, because neither of the preceding options is guaranteed,
> I think there is no choice: hosts must be able to recover from
> dead addresses.

Agreed.



-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492

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