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Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00.txt

Mark Smith <markzzzsmith@gmail.com> Tue, 15 June 2021 21:39 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Wed, 16 Jun 2021 07:39:06 +1000
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To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: sthaug@nethelp.no, Ed Horley <ed@hexabuild.io>, v6ops list <v6ops@ietf.org>
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Subject: Re: [v6ops] I-D Action: draft-horley-v6ops-lab-00.txt
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On Wed, 16 Jun 2021, 07:00 Brian E Carpenter, <brian.e.carpenter@gmail.com>
wrote:

> On 16-Jun-21 02:17, sthaug@nethelp.no wrote:
> >>> Maybe recommending the Global ID for L=0 be taken from the
> corresponding
> >>> 40 bits of the network's GUA Prefix.
> >>>
> >>> Just a thought.
> >>
> >> Understood, and a reasonable suggestion, however it still doesn’t
> address
> >> that ULA space precedence, effectively makes it useless for dual-stack
> lab
> >> scenarios. Even for IPv6 only it doesn’t work unless you take all the
> >> effort to turn off APIPA.
> >
> > Some of us use ULA for lab networks with no apparent problems.
>
> But if your test case wants the internal test addresses to have exactly
> the same behavior in address selection as external GUAs, the default
> precedence for ULAs is an issue. I think that's Ed's point.
>

We're all guessing until Ed explains in more detail what his issue is.

Posting a copy of the IPv6 default address selection table without
explanation doesn't do that. We need example test scenarios to see why
there would be issues.

It seems Ed thinks IPv4 is preferred more often in a dual stack network
than it is, but I'm guessing.

Regards,
Mark.





>    Brian
>
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