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

Gert Doering <gert@space.net> Thu, 25 February 2021 16:59 UTC

Return-Path: <gert@space.net>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F00363A1D2A for <ipv6@ietfa.amsl.com>; Thu, 25 Feb 2021 08:59:31 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.099
X-Spam-Level:
X-Spam-Status: No, score=-2.099 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=space.net
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JAnGO_Hq09Q7 for <ipv6@ietfa.amsl.com>; Thu, 25 Feb 2021 08:59:29 -0800 (PST)
Received: from gatekeeper1-relay.space.net (gatekeeper1-relay.space.net [IPv6:2001:608:3:85::38]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 99E783A1D0F for <6man@ietf.org>; Thu, 25 Feb 2021 08:59:18 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=space.net; i=@space.net; q=dns/txt; s=esa; t=1614272359; x=1645808359; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=B03BOpwdVL0ccZ7uzqqI7l1/p1HTW8vTCwwgrfK7hdE=; b=BX67kFLIL4/iJzQ1y92foWKjlM1X5+nYGf5YMIzn+0RgoIWVHdBizTPO KVWNoyd28KzQQ0jqGN/xpY2LVGlH15kdN6UekmZWxC441NAVLuuJl3qvK YKhNUR9WINTR4j6aIaIdYRrK44RLAO8TX7YAeuK0UseZvXGavkASyHo6B LpSWH31/bieYu778sm5piB8Fdt9g+Zx9Dq1HeD+YR9tiG0lePiPidjifu 8j8EbHrCUBmpvR/DL9VDC+NL+qMsUNU6JrPmekPkla1sEFudmAygovQtC qhPrBZT34Bh2wJYcuTvv7vIZoS43cEOf/aKci/jyt7WoMTkRWStgZA5RI A==;
IronPort-SDR: 8hWvkEWWf9YcO0+LBngl4C8XmEdhZ6F/Up/h7PrypzAkBVaQWdN/JGH9yon3iRgQsdp6ZDO2lP iRHJOK9caLs0yuU6BZ0S+nPxturS+nzIYI0gGZndCoz90nR6oHfgxjHu1+yEZ3Kg/Y81f/3INf kM3aRz0XSlzob8TotQ4MdkmEy7ItQRjy34x4UtNffadxk4HDBDiD6um3A5u+5kkDQ3Y2bSrlCm LqsOWzYK6n18DuXHv/jMmb3eaVEftvmS7tEVFLELM26FrXh3lP2TpfFDNf51JRt0jv61YG6cDY AtA=
X-SpaceNet-SBRS: None
Received: from mobil.space.net ([195.30.115.67]) by gatekeeper1-relay.space.net with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Feb 2021 17:59:15 +0100
X-Original-To: 6man@ietf.org
Received: from mobil.space.net (localhost [IPv6:::1]) by mobil.space.net (Postfix) with ESMTP id 901C343B99 for <6man@ietf.org>; Thu, 25 Feb 2021 17:59:15 +0100 (CET)
X-SpaceNet-Relay: true
X-SpaceNet-Relay: true
X-SpaceNet-Relay: true
X-SpaceNet-Relay: true
X-SpaceNet-Relay: true
X-SpaceNet-Relay: true
Received: from moebius4.space.net (moebius4.space.net [IPv6:2001:608:2:2::251]) by mobil.space.net (Postfix) with ESMTP id 77C2543B98; Thu, 25 Feb 2021 17:59:15 +0100 (CET)
Received: by moebius4.space.net (Postfix, from userid 1007) id 715E4109421; Thu, 25 Feb 2021 17:59:15 +0100 (CET)
Date: Thu, 25 Feb 2021 17:59:15 +0100
From: Gert Doering <gert@space.net>
To: Owen DeLong <owen@delong.com>
Cc: Gert Doering <gert@space.net>, Fernando Gont <fgont@si6networks.com>, "Manfredi (US), Albert E" <albert.e.manfredi@boeing.com>, IPv6 Operations <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>
Subject: Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
Message-ID: <YDfXY13wEOaIuBMU@Space.Net>
References: <a5b9b8566ce446d3a5e5dcc9ca2fbac2@boeing.com> <CAN-Dau1xD21EpqrSXKHLzADPyjeWcwc=phHGSFP8cj6705O2BQ@mail.gmail.com> <5f0f480a-b331-7f0c-a738-5d80bd8569e6@si6networks.com> <02dd48fbe6cc44c482662fdc1978219f@boeing.com> <4908665c-94cf-810f-8bff-7407e3abe099@si6networks.com> <c09cfe42-f74b-ccaf-f03b-fb6942ed890f@gmail.com> <061050f0-6034-d11c-1898-24bc8461aed9@si6networks.com> <YDEX/Uu9X2hm+RX/@Space.Net> <F652A983-7624-4D23-8C54-A1990C55B687@delong.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="WdSE3DFrJ46/1WjK"
Content-Disposition: inline
In-Reply-To: <F652A983-7624-4D23-8C54-A1990C55B687@delong.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/bqYwyIvZr8NW7RUF2LrTpc0hC50>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 25 Feb 2021 16:59:38 -0000

Hi,

On Tue, Feb 23, 2021 at 03:18:44PM -0800, Owen DeLong wrote:
> > In practice, how much IPv6 multicast is there which is not "node" and
> > "link" scoped?  Or, to be even more picky, not "link" scoped?
> A lot less than there should be.

I beg to differ on that...  among all the problems IPv6 has, "lack of
multicast" is not one...

Wide-scale routed multicast is a very nice idea, but totally non-deployable
across network boundaries in reality.  We've tried, for many years (with
IPv4), and every time a customer wanted to use it, it was broken in some
non-debuggable way (like, RP-Tree selecting a path in 3549 where they forgot
to turn on PIM on the interfaces...).

Even on-link multicast gets broken by switch vendors often enough.

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

SpaceNet AG                      Vorstand: Sebastian v. Bomhard, Michael Emmer
Joseph-Dollinger-Bogen 14        Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                 HRB: 136055 (AG Muenchen)
Tel: +49 (0)89/32356-444         USt-IdNr.: DE813185279