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

Richard Patterson <richard@helix.net.nz> Fri, 25 October 2019 16:08 UTC

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From: Richard Patterson <richard@helix.net.nz>
Date: Fri, 25 Oct 2019 17:07:51 +0100
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Subject: Re: [v6ops] SLAAC renum: Problem Statement & Operational workarounds
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On Fri, 25 Oct 2019 at 14:17, Mark Smith <markzzzsmith@gmail.com> wrote:

>
> So I would like to hear from ISPs that purposely "flash renumber" why
> they do so, and how often.
>

I wouldn't say purposely, we've gone to a lot of effort to keep them as
stable as possible, however, there are times where network events could
cause a current lease to become stale (or invalid), and for the new lease
to contain a different prefix.
i.e.  If our transmission team decide to re-home a metro area, or if the
capacity planning team decides to rebalance between BNGs.

We don't offer truly static PD assignments as we don't have to build and
maintain a topology aware IPAM <-> RADIUS service, when we can simply let
the BNG/DHCPv6 server deal with assignments dynamically.

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