Re: [v6ops] Stability and Resilience (was Re: A common...)
Owen DeLong <owen@delong.com> Fri, 22 February 2019 22:30 UTC
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From: Owen DeLong <owen@delong.com>
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Date: Fri, 22 Feb 2019 14:30:35 -0800
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Cc: Lee Howard <lee@asgard.org>, IPv6 Ops WG <v6ops@ietf.org>, "ipv6@ietf.org" <ipv6@ietf.org>
To: Tim Chown <Tim.Chown@jisc.ac.uk>
References: <6D78F4B2-A30D-4562-AC21-E4D3DE019D90@consulintel.es> <B6E2EC33-EEAF-40D0-AFCC-BDAFA9134ACD@consulintel.es> <20190220113603.GK71606@Space.Net> <28fbc2c305c640c9afb3704050f6e8d7@boeing.com> <20190220213107.GS71606@Space.Net> <019c552eb1624d348641d6930829fd1f@boeing.com> <CAKD1Yr0HBG+rhyFWg9zh0t3mW486Mjx9umjn+CRqAZg4z9r0dg@mail.gmail.com> <20190221073530.GT71606@Space.Net> <CAO42Z2wmB2W52b4MZ2h9sW5E9cQKm-HRjyf--q8C26jezS7LXQ@mail.gmail.com> <a73818d31db7422b99a524bc431b00ed@boeing.com> <CAO42Z2z9-48Gbb_Exf+oWUqDO=axSLpZBtqeDcxkAoFq5OziGw@mail.gmail.com> <0629af5e-5e1b-7e01-5bf4-b288a2d36809@asgard.org> <DD0A06B0-C704-451C-AA43-CAF420F24B4D@delong.com> <763ED571-AC76-419A-A0B6-43F9AC763F53@jisc.ac.uk>
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Subject: Re: [v6ops] Stability and Resilience (was Re: A common...)
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> On Feb 22, 2019, at 09:30 , Tim Chown <Tim.Chown@jisc.ac.uk> wrote: > > Hi, > >> On 22 Feb 2019, at 17:04, Owen DeLong <owen@delong.com <mailto:owen@delong.com>> wrote: >>> Networks should, as much as possible, be resilient to prefix changes. Some things networks can do to improve resilience: >>> >>> Write a learned prefix to non-volatile memory and issue a DHCPv6 Renew for that prefix on reboot. >>> >>> >>> Use dynamic DNS and shorter TTLs. >>> >>> >>> Implement something like NETCONF to distribute prefix information to policy devices like firewalls or SD-WAN controllers. I think a separate document describing this application of NETCONF would make sense. >> >> If the prefix is written to nv men, wouldn’t it also be possible for implementers to send rapid deprecation RAs for any prefix not renewed? >> >> In other words, after reboot, try to reacquire same prefix. If that doesn’t work, when you advertise the new prefix, you could also include the old prefix with a very short preferred and valid lifetime (e.g. 1 second) in the first RA, which should be sent to the all nodes on link multicast? >> >> It doesn’t eliminate the problem, but 1 second additional duration would be barley noticeable amid the minute or so it takes most home gateways to reboot. > > That's similar in spirit to RAmond, which we used to use when seeing rogue RAs on our campus network. It would auto-deprecate any prefixes that shouldn't be there. (http://ramond.sourceforge.net/ <http://ramond.sourceforge.net/>) > > The snag is that I suspect most OSes would ignore a valid timer of 1 second, given the 7200 second (2 hour) minimum defined in RFC 4862 (unless the RA is authenticated, somehow). The preferred timer can be zero. When RAmond was written, if we used a valid timer less than 7200 seconds it seemed that the deprecating RAs were ignored. That was 10+ years ago though. Perhaps Tim Winters has data on whether that rule is implemented today in practice; I'd assume the tests he runs might include that. > > But I like Lee's analysis. > > Tim Actually, a preferred:0 valid:7200 probably would do the trick as well. It won’t salvage the sessions on the old address since they don’t route any more, but at least it will allow new sessions to use a valid address. Owen
- [v6ops] A common problem with SLAAC in "renumberi… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Tassos Chatzithomaoglou
- Re: [v6ops] A common problem with SLAAC in "renum… Bernie Volz (volz)
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… Sander Steffann
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Sander Steffann
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… Philip Homburg
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Tarko Tikan
- Re: [v6ops] A common problem with SLAAC in "renum… Philip Homburg
- Re: [v6ops] A common problem with SLAAC in "renum… Tarko Tikan
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Sander Steffann
- Re: [v6ops] A common problem with SLAAC in "renum… Sander Steffann
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Philip Homburg
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Fred Baker
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… Joel M. Halpern
- Re: [v6ops] A common problem with SLAAC in "renum… Nick Hilliard
- Re: [v6ops] A common problem with SLAAC in "renum… Michael Richardson
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… Brian E Carpenter
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Christian Huitema
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Michael Richardson
- Re: [v6ops] A common problem with SLAAC in "renum… Michael Richardson
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Christian Huitema
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Andrews
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Christian Huitema
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Tore Anderson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Jen Linkova
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Jen Linkova
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Joel M. Halpern
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Jen Linkova
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Nick Hilliard
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… sthaug
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… j h woodyatt
- Re: [v6ops] A common problem with SLAAC in "renum… Manfredi (US), Albert E
- Re: [v6ops] A common problem with SLAAC in "renum… Nick Hilliard
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… Manfredi (US), Albert E
- Re: [v6ops] A common problem with SLAAC in "renum… Brian E Carpenter
- Re: [v6ops] A common problem with SLAAC in "renum… Lorenzo Colitti
- Re: [v6ops] A common problem with SLAAC in "renum… Manfredi (US), Albert E
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Erik Kline
- Re: [v6ops] A common problem with SLAAC in "renum… Erik Kline
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Erik Kline
- Re: [v6ops] A common problem with SLAAC in "renum… Brian E Carpenter
- Re: [v6ops] A common problem with SLAAC in "renum… j h woodyatt
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Erik Kline
- Re: [v6ops] A common problem with SLAAC in "renum… j h woodyatt
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… Tim Chown
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Timothy Winters
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Brian E Carpenter
- Re: [v6ops] A common problem with SLAAC in "renum… Manfredi (US), Albert E
- Re: [v6ops] A common problem with SLAAC in "renum… Brian E Carpenter
- Re: [v6ops] A common problem with SLAAC in "renum… Brian E Carpenter
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Gert Doering
- Re: [v6ops] A common problem with SLAAC in "renum… Manfredi (US), Albert E
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Tom Herbert
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Andrews
- Re: [v6ops] A common problem with SLAAC in "renum… Owen DeLong
- Re: [v6ops] A common problem with SLAAC in "renum… Lorenzo Colitti
- Re: [v6ops] A common problem with SLAAC in "renum… Lorenzo Colitti
- Re: [v6ops] A common problem with SLAAC in "renum… Tom Herbert
- Re: [v6ops] A common problem with SLAAC in "renum… Owen DeLong
- Re: [v6ops] A common problem with SLAAC in "renum… Tom Herbert
- Re: [v6ops] A common problem with SLAAC in "renum… JORDI PALET MARTINEZ
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- [v6ops] NAT debate (Re: A common problem with SLA… Fernando Gont
- Re: [v6ops] NAT debate (Re: A common problem with… Tom Herbert
- Re: [v6ops] NAT debate (Re: A common problem with… Kristian McColm
- Re: [v6ops] NAT debate (Re: A common problem with… Tom Herbert
- Re: [v6ops] NAT debate (Re: A common problem with… Kristian McColm
- Re: [v6ops] NAT debate (Re: A common problem with… Ca By
- Re: [v6ops] NAT debate (Re: A common problem with… Raymond Burkholder
- Re: [v6ops] NAT debate (Re: A common problem with… Kristian McColm
- [v6ops] Is addressing privacy via NAT really achi… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Christian Huitema
- Re: [v6ops] NAT debate (Re: A common problem with… Mark Smith
- [v6ops] 464XLAT -- Re: NAT debate (Re: A common p… Lencse Gábor
- Re: [v6ops] A common problem with SLAAC in "renum… Nick Hilliard
- Re: [v6ops] 464XLAT -- Re: NAT debate (Re: A comm… Ca By
- [v6ops] Stability and Resilience (was Re: A commo… Lee Howard
- Re: [v6ops] A common problem with SLAAC in "renum… Christian Huitema
- Re: [v6ops] Stability and Resilience (was Re: A c… Owen DeLong
- Re: [v6ops] Stability and Resilience (was Re: A c… Michael Richardson
- Re: [v6ops] Is addressing privacy via NAT really … Tom Herbert
- Re: [v6ops] Stability and Resilience (was Re: A c… Tim Chown
- Re: [v6ops] Stability and Resilience (was Re: A c… Timothy Winters
- Re: [v6ops] Stability and Resilience (was Re: A c… David Farmer
- Re: [v6ops] Is addressing privacy via NAT really … Ca By
- Re: [v6ops] Stability and Resilience (was Re: A c… Lee Howard
- Re: [v6ops] Stability and Resilience (was Re: A c… Lee Howard
- Re: [v6ops] Is addressing privacy via NAT really … Tom Herbert
- Re: [v6ops] Is addressing privacy via NAT really … Michael Richardson
- Re: [v6ops] Stability and Resilience (was Re: A c… David Farmer
- Re: [v6ops] Stability and Resilience (was Re: A c… Lee Howard
- Re: [v6ops] Stability and Resilience (was Re: A c… Owen DeLong
- Re: [v6ops] Is addressing privacy via NAT really … Ca By
- Re: [v6ops] Is addressing privacy via NAT really … Tom Herbert
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] Stability and Resilience (was Re: A c… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] Stability and Resilience (was Re: A c… Fernando Gont
- Re: [v6ops] Stability and Resilience (was Re: A c… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Ted Lemon
- Re: [v6ops] A common problem with SLAAC in "renum… Lee Howard
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Ted Lemon
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Lorenzo Colitti
- Re: [v6ops] A common problem with SLAAC in "renum… STARK, BARBARA H
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Tim Chown
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Tim Chown
- Re: [v6ops] A common problem with SLAAC in "renum… Ole Troan
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Mark Smith
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… Michael Richardson
- Re: [v6ops] A common problem with SLAAC in "renum… Mikael Abrahamsson
- Re: [v6ops] A common problem with SLAAC in "renum… Lorenzo Colitti
- Re: [v6ops] A common problem with SLAAC in "renum… Lorenzo Colitti
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] Is addressing privacy via NAT really … Behcet Sarikaya
- Re: [v6ops] A common problem with SLAAC in "renum… 神明達哉
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… 神明達哉
- Re: [v6ops] A common problem with SLAAC in "renum… Fernando Gont
- Re: [v6ops] A common problem with SLAAC in "renum… Owen DeLong
- Re: [v6ops] A common problem with SLAAC in "renum… Richard Patterson
- Re: [v6ops] A common problem with SLAAC in "renum… 神明達哉