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Re: [v6ops] draft-ietf-v6ops-slaac-renum and draft-ietf-v6ops-cpe-slaac-renum

Richard Patterson <richard@helix.net.nz> Wed, 20 May 2020 20:55 UTC

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From: Richard Patterson <richard@helix.net.nz>
Date: Wed, 20 May 2020 21:55:10 +0100
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To: Philip Homburg <pch-v6ops-9@u-1.phicoh.com>
Cc: "v6ops@ietf.org list" <v6ops@ietf.org>, Richard Patterson <richard@helix.net.nz>
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Subject: Re: [v6ops] draft-ietf-v6ops-slaac-renum and draft-ietf-v6ops-cpe-slaac-renum
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On Wed, 20 May 2020 at 17:10, Philip Homburg <pch-v6ops-9@u-1.phicoh.com>
wrote:

>
> I have a hard time following this reasoning. We know that customers with
> static prefixes are impacted by this and end up with short leases on their
> prefixes. There is no point in limiting RA values for static prefixes.
>

The DHCPv6 PD client doesn't know that the prefix is static, just that it
has the rights to use that prefix for up to the Valid Lifetime.
It's presumptuous and foolish of the host to over-promise the use of said
prefix downstream.


>
> Of the other hand, for dynamic prefixes, which this draft tries to deal
> with, there is no problem with relatively long lease times.
>

But there is, that's what we're trying to mitigate.


> So this draft makes the situation worse for static prefixes to better
> deal with the unwanted situation of dynamic prefixes. To me that strikes me
> as completely the wrong way around.
>

You might have to expand on why you think shorter lifetimes are "worse".

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