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Re: [v6ops] [Snac] "router cascade with DHCPv6-PD"

Ole Troan <otroan@employees.org> Thu, 02 February 2023 13:25 UTC

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From: Ole Troan <otroan@employees.org>
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Date: Thu, 02 Feb 2023 14:24:43 +0100
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Cc: Klaus Frank <klaus.frank@posteo.de>, Gert Doering <gert@space.net>, snac@ietf.org, V6 Ops List <v6ops@ietf.org>, Juliusz Chroboczek <jch@irif.fr>, Michael Richardson <mcr+ietf@sandelman.ca>
To: Ted Lemon <mellon@fugue.com>
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Subject: Re: [v6ops] [Snac] "router cascade with DHCPv6-PD"
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Ted,

Exactly!

> I don't know how you do stable prefix assignment to subnets with NDP/ICMP. I'm sure you could, but how much different than PD would it be at that point?

The original prefix delegation proposal did exactly that:
https://datatracker.ietf.org/doc/html/draft-haberman-ipngwg-auto-prefix-02

And the observation was then “this looks just like DHCP, why not use that?”

O.


> 
> On Thu, Feb 2, 2023 at 12:22 AM Klaus Frank <klaus.frank@posteo.de <mailto:klaus.frank@posteo.de>> wrote:
>> I agree, with that. And tbh, I personally think introducing DHCPv6-PD at 
>> all was a conceptional mistake. It's duties should have been carried out 
>> by ICMPv6 and NDP...
>> 
>> Also there is no real alternative for environments with dynamically 
>> assigned prefixes or where clients are roaming between networks and need 
>> a delegated prefix locally for e.g. Docker or VMs... Except for "use 
>> DHCPv6-PD to get the prefix, run a DIY script to update configuration 
>> files and restart radvd and/or bird..."
>> 
>> On 22.01.2023 20:56, Gert Doering wrote:
>> > DHCPv6-PD seems to be a half-finished routing protocol already, and trying to
>> > wiggle around admitting it.
>> >
>> > Gert Doering
>> >          -- NetMaster
>> >
>> > _______________________________________________
>> > v6ops mailing list
>> > v6ops@ietf.org <mailto:v6ops@ietf.org>
>> > https://www.ietf.org/mailman/listinfo/v6ops
>> -- 
>> Snac mailing list
>> Snac@ietf.org <mailto:Snac@ietf.org>
>> https://www.ietf.org/mailman/listinfo/snac

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