Re: [v6ops] [EXTERNAL] Re: Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Gert Doering <> Tue, 16 February 2021 16:20 UTC

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Date: Tue, 16 Feb 2021 17:20:36 +0100
From: Gert Doering <>
To: Ted Lemon <>
Cc: Gert Doering <>, Philip Homburg <>, Fernando Gont <>,, "" <>
Subject: Re: [v6ops] [EXTERNAL] Re: Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
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On Tue, Feb 16, 2021 at 11:06:59AM -0500, Ted Lemon wrote:
> On Feb 16, 2021, at 11:01 AM, Gert Doering <> wrote:
> > I cannot comment this in any way that is not full of negativism about
> > the achievements of IETF work in the area of SoHo multihoming.  Sorry.
> Actually, RFC 8028 seems to address this problem correctly at least 
> for the single-link model:

Maybe the message hasn't been reached the OS stack vendors... but as
of last week, we didn't find any OS that does this correctly.

Linux, for example, will just pick one default gateway, usually "the one 
from the RA received last".

Of course we did not test all available IPv6 stacks, so I would be happy
to learn about implementations that get this right.

(And yes, while technically "not an IETF fault", the aspect that this
was only standardized about 20 years after people had their IPv6 stacks 
written *is*)

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

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