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

Ted Lemon <mellon@fugue.com> Tue, 16 February 2021 16:07 UTC

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From: Ted Lemon <mellon@fugue.com>
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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)
Date: Tue, 16 Feb 2021 11:06:59 -0500
In-Reply-To: <YCvsVVkQc5zDJQVh@Space.Net>
Cc: Philip Homburg <pch-v6ops-9@u-1.phicoh.com>, Fernando Gont <fgont@si6networks.com>, v6ops@ietf.org, "6man@ietf.org" <6man@ietf.org>
To: Gert Doering <gert@space.net>
References: <c0cd20f7-aa40-0053-9056-4df913716ac7@si6networks.com> <d1ea3406ec70488696a091ac1d5d0ff9@boeing.com> <98707BCB-C0BF-434A-B6F2-70CE20418CDD@fugue.com> <7EE1DA6D-0751-48FF-8238-FFEE15CE891E@gmail.com> <6167230f-b32a-e995-c071-b6c199ac5d64@si6networks.com> <858465C5-F428-4B47-8549-FCC201143B0C@fugue.com> <6959c883-a255-5ab8-9027-e05d369af2ff@si6networks.com> <m1lC29B-0000MuC@stereo.hq.phicoh.net> <YCvkYXwTrSdQoe8Q@Space.Net> <F63054D3-59D0-47FA-AABF-98A18B8DFA6F@fugue.com> <YCvsVVkQc5zDJQVh@Space.Net>
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On Feb 16, 2021, at 11:01 AM, Gert Doering <gert@space.net> 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:

   Default Router Selection (Section 6.3.6 of [RFC4861] <https://tools.ietf.org/html/rfc4861#section-6.3.6>) is extended as
   follows: A host SHOULD select default routers for each prefix it is
   assigned an address in.  Routers that have advertised the prefix in
   their Router Advertisement message SHOULD be preferred over routers
   that do not advertise the prefix, regardless of Default Router
   Preference.  Note that this document does not change the way in which
   default router preferences are communicated [RFC4191 <https://tools.ietf.org/html/rfc4191>].

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