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Re: [v6ops] Thoughts about wider operational input

Vasilenko Eduard <vasilenko.eduard@huawei.com> Tue, 22 March 2022 16:44 UTC

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From: Vasilenko Eduard <vasilenko.eduard@huawei.com>
To: Gert Doering <gert@space.net>, Toerless Eckert <tte@cs.fau.de>
CC: "v6ops@ietf.org" <v6ops@ietf.org>, JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
Thread-Topic: [v6ops] Thoughts about wider operational input
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Date: Tue, 22 Mar 2022 16:44:38 +0000
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Subject: Re: [v6ops] Thoughts about wider operational input
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This is very right.
If the decision point is on the host then it is possible to play with the policy on what to use.
Section 5.1 is about "equal prefixes" and "non-equal prefixes": https://datatracker.ietf.org/doc/html/draft-vv-6man-nd-prefix-robustness-02#page-13
Ed/
-----Original Message-----
From: v6ops [mailto:v6ops-bounces@ietf.org] On Behalf Of Gert Doering
Sent: Tuesday, March 22, 2022 6:21 PM
To: Toerless Eckert <tte@cs.fau.de>
Cc: v6ops@ietf.org; JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
Subject: Re: [v6ops] Thoughts about wider operational input

Hi,

On Tue, Mar 22, 2022 at 11:41:19AM +0100, Toerless Eckert wrote:
> Why would it not be a desirable feature for me as the end-user to have 
> an IPv6/IPv6 NAT on the router towards the 3 Internet connections to 
> which i multi-home ? Sure, we can probably list some downsides, but 
> they need to be weighted against the benefits for me as an end user. Not ?

This being an IETF list, it is not allowed to find anything-NAT beneficial.

OTOH, as an operator, I find this a viable option.

The reason why I prefer "host has multiple GUAs" better, in theory, is that it gives the *user* more control on what he wants - like, "I can run my bittorrent via the cable ISP, and SSH out via LTE", by selecting the corresponding source IP = selecting the outgoing ISP.

Now, in practice, source address selection for "there are multiple GUAs with different pros/cons attached" is lacking quite a bit.  And HNCP routers with source-based forwarding can not be bought.  So all the nice things do not work.


Which means, "a router with GUAs inside, a DSL port and a LTE modem and
NPT66 on both outside interfaces" is a really nice redundancy solution for basically all "mostly unmanaged" SME networks.

You'd pass control on "what should go where?" from the host to the router, but given that hosts are not there yet, that will get the job done.

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

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