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[v6ops] Re: Dynamic addresses

Marco Moock <mm@dorfdsl.de> Tue, 13 August 2024 04:54 UTC

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Date: Tue, 13 Aug 2024 06:54:39 +0200
From: Marco Moock <mm@dorfdsl.de>
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Subject: [v6ops] Re: Dynamic addresses
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Am Tue, 13 Aug 2024 06:16:22 +0530
schrieb Daryll Swer <contact@daryllswer.com>:

> Even if you change the values to N, you still have broken
> connectivity for N time. I am of the opinion, that no, SLAAC is
> indeed working as specified, and there are no reasons to mess with
> the values. What needs to be changed is: for ISPs to give the user
> options for either A. Dynamic ia_pd at the user's discretion with the
> downsides for SLAAC operational behaviour Or B. Static ia_pd that
> does not change (unless drastic changes occurs upstream, which also
> applies to v4 anyway).

Can someone please explain why dynamic prefixes create a problem when
used properly?

DHCPv6 has a lease time and the RA prefix has a lifetime too. If that
lifetime is not more than the lifetime of the DHCPv6 PD.

A router can also extend that to avoid connection interrupts.

By the RFC, a proper operation is possible. Some hard- and software and
some ISPs break it.

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