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Re: Adoption Call for "Improving the Robustness of Stateless Address Autoconfiguration (SLAAC) to Flash Renumbering Events"

Lorenzo Colitti <lorenzo@google.com> Tue, 30 June 2020 01:03 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 30 Jun 2020 10:03:25 +0900
Message-ID: <CAKD1Yr25v3Pe4noaSsVbFuRs18ePYDQCf7G+5A3a_X1OUWG_bw@mail.gmail.com>
Subject: Re: Adoption Call for "Improving the Robustness of Stateless Address Autoconfiguration (SLAAC) to Flash Renumbering Events"
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: Fernando Gont <fernando@gont.com.ar>, IPv6 List <ipv6@ietf.org>, Bob Hinden <bob.hinden@gmail.com>
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On Tue, Jun 30, 2020 at 6:00 AM Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> > Please read the substance of the email I linked earlier. For example:
> for the problem to occur it is not sufficient that there be flash
> renumbering. The problem only occurs if there is a flash renumbering AND a
> crash with loss of state AND layer 2 remains up.
>
> Assuming you mean loss of state in the CE router, my experience was that
> an ADSL disconnect/reconnect did apparently cause loss of state. And my
> Windows host didn't seem to treat a short break in WiFi connectivity
> without a change of SSID as a layer 2 failure.
>

Right, but in that case the router (and should) can send router
advertisements that tell hosts that the old prefix is gone. There is no
loss of state.

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