[ipv6-wg] Free GUA space for community projects [CfP/RFC] (was: Minutes from the IPv6 WG @ RIPE 83)

Hi Gert,

>How can a NPT based solution know that "ISP A" is a walled garden?
By DNS.
I did stress below that host has the same ULA in all cases (no need for the choice of proper GUA). Wherever routing or source routing would push the traffic, it would be the possibility for the last CPE (in front of Carrier) to NPT to proper GUA.

>How will a NPT based solution create proper router redundancy?  Terminating both ISPs on the same router is not what I'd call "redundant connections".
It is not mandatory. NPT Routers could be different. Like it was for NAT44.
The design could be simple with uncontrolled load balancing between CPEs or it could be source-routing - it is up to the Admin.

> This has been addressed independent of Homenet, because it affects ISP flash renumbering as well.
The current solution that is accepted in 6man is to cut the preferred lifetime from 1 week to 2h.
IMHO: there is no solution in the discussion for "flash renumbering".
I have heard from many people that "it is not important" problem.
I do believe it is important: https://datatracker.ietf.org/doc/html/draft-vv-6man-nd-prefix-robustness-01

Eduard
-----Original Message-----
From: Gert Doering [mailto:gert at space.net] 
Sent: Wednesday, December 22, 2021 11:37 AM
To: Vasilenko Eduard <vasilenko.eduard at huawei.com>
Cc: Gert Doering <gert at space.net>; Leo Vegoda <leo at vegoda.org>; Marco Hogewoning <marcoh at ripe.net>; ipv6-wg at ripe.net
Subject: Re: [ipv6-wg] Free GUA space for community projects [CfP/RFC] (was: Minutes from the IPv6 WG @ RIPE 83)

Hi,

On Wed, Dec 22, 2021 at 08:33:40AM +0000, Vasilenko Eduard wrote:
> 3. use proper source based routing on the ISP routers -> see homenet WG.
> 
> a) homenet is not available on real products

Your employer is in a situation to fix that.

> b) if a particular resource is in the walled garden of one Carrier (access from other carriers are filtered), then source routing would not help, proper source address should be chosen first on the host. Only NPT resolves this situation now.

How can a NPT based solution know that "ISP A" is a walled garden?

How will a NPT based solution create proper router redundancy?  Terminating both ISPs on the same router is not what I'd call "redundant connections".

> c) homenet did not try to resolve ND problems of proper withdrawal for stale prefixes. If uplink to one carrier would be lost - it does not discuss how it would be informed to the hosts on the first hop.

This has been addressed independent of Homenet, because it affects ISP flash renumbering as well.

> Hence, no - solution 3 does not exist.

If phrased that way, neither do "solution 1" or "solution 2" today.

Gert Doering
        -- NetMaster
--
have you enabled IPv6 on something today...?

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