Re: [v6ops] SLAAC renum: Problem Statement & Operational workarounds

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 29 October 2019 01:22 UTC

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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Tue, 29 Oct 2019 14:22:35 +1300
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Subject: Re: [v6ops] SLAAC renum: Problem Statement & Operational workarounds
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On 29-Oct-19 10:57, Jen Linkova wrote:
> On Thu, Oct 24, 2019 at 9:47 PM Ole Troan <otroan@employees.org> wrote:
>> Right. Instant/flash renumbering is not supported in IP networks.
> 
> Oh. Surprise. After I've been doing it all the time....;)
> 
> Actually it would be helpful  to define requirements/expectations. I read it as:
> R1: [MUST HAVE] after the renumbering host is able to open new connections

How long after? Milliseconds, seconds, or minutes? It makes a lot of difference to the solution.

> R2: [NICE TO HAVE] old connections survive the renumbering.

I believe that when the operators refused to consider SHIM6 ten years ago, they were telling us that they really, truly do not care about that. So this becomes an application layer robustness issue.

    Brian