IETF Logo Mail Archive

Re: [v6ops] privacy point re. unsolicited NA / router neighbor cache

Fred Baker <fredbaker.ietf@gmail.com> Tue, 23 July 2019 19:49 UTC

Return-Path: <fredbaker.ietf@gmail.com>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5A35F120969 for <v6ops@ietfa.amsl.com>; Tue, 23 Jul 2019 12:49:13 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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=gmail.com
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 eXU-ag9drY-T for <v6ops@ietfa.amsl.com>; Tue, 23 Jul 2019 12:49:11 -0700 (PDT)
Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BFEDF120964 for <v6ops@ietf.org>; Tue, 23 Jul 2019 12:49:11 -0700 (PDT)
Received: by mail-pl1-x62f.google.com with SMTP id a93so20961622pla.7 for <v6ops@ietf.org>; Tue, 23 Jul 2019 12:49:11 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Y0sBjVQv2WB/dzcHC9IvD0spOLG27te2T5UcBAqqg8o=; b=FEB/r9yKXI1VpL03ca6dhwtSIs/52UppUHZCHtTpTFIfhddW9D473Fk0t67Ea8KksZ iCLgsWGmk5us2jUguCJ5ANF5Y0XESXV5Uv+v2Obk3Ec9HekXp8QtytD5fS3ebl6jQiyk iwsGm/WvJj4RT9QY5nI8reK2CAan6QX2J3Mu5mkVcr0L5d4E9dLWOHMLEkuue+CdKHXh xkiu+RmM3Y3KaKwBFiJ2ID3vZSPZ53icqQUf9a3649VfbUbB6GrhW1qoUcjERaQ67CYY NEALM4yE4XvobjvQlCWwS07PH1zGAYEKtayGBQNzRAkCDgxumpEHXNWYqk6xqAw6xNIG 5A4A==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Y0sBjVQv2WB/dzcHC9IvD0spOLG27te2T5UcBAqqg8o=; b=s2ezkepwH7kwaa0coOJtq8dnzk36s4EKq+zDmSILH0mg05mC53QB1jwm8YqVW7vmBv HYjpGuJ1rFFu1/nvNElDj49KGxe3wciLbabUx+pPVNrumKL/rLc3EWGJdbf9UVH6LaRE 0ymIYIyNbW53P547rJTF8o8tb77g6qKMYEzC1fqzhqmXFniVROfKaDyhW3fqJMUoh+n4 X3QEkyu/hCsBOQgoLjnYKkeflbbCvi4DnWESSe5NdugnLgCvkROcp30njIMI9wUWpDl1 1EsQ/yTnNTt5eusA/MbK9QiTyQ/eoPoc5812e8KehsnYvzUCCL7mXjB47mhRroGy4hpH 9JkA==
X-Gm-Message-State: APjAAAXJknke7zix+wl02YIDkLpRZnNN5N7wFSrgHykNGsmyAyxD/AA/ k5oZRZ3/2peV/m2dmcxc/gXUFmTh4qQ=
X-Google-Smtp-Source: APXvYqw0PUMbsxYXYecdiEA+1K0fH8xEJlQaoq4qYSkk1mAkx1QEEIIl/iK16yLNQoCkVoN9YLCvOA==
X-Received: by 2002:a17:902:4283:: with SMTP id h3mr79862036pld.15.1563911351389; Tue, 23 Jul 2019 12:49:11 -0700 (PDT)
Received: from [172.26.35.62] ([76.14.1.154]) by smtp.gmail.com with ESMTPSA id b6sm38910600pgq.26.2019.07.23.12.49.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Jul 2019 12:49:10 -0700 (PDT)
Content-Type: text/plain; charset="us-ascii"
Mime-Version: 1.0 (Mac OS X Mail 13.0 \(3566.0.1\))
From: Fred Baker <fredbaker.ietf@gmail.com>
In-Reply-To: <20190723143057.GC258193@eidolon.nox.tf>
Date: Tue, 23 Jul 2019 12:49:09 -0700
Cc: Gert Doering <gert@space.net>, v6ops list <v6ops@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <0A90737A-EF06-41AA-984E-A1ACA975BFC7@gmail.com>
References: <20190722213727.GI34551@eidolon.nox.tf> <CAO42Z2zn-V9HrKGDC_api7BE4Sy6jmcrfKR7nbnSrHA5NpxYjQ@mail.gmail.com> <20190723000049.GJ34551@eidolon.nox.tf> <20190723070141.GG60824@Space.Net> <20190723143057.GC258193@eidolon.nox.tf>
To: David Lamparter <equinox@diac24.net>
X-Mailer: Apple Mail (2.3566.0.1)
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/916fzLvROFCJvzl2X90qsNf-uzU>
Subject: Re: [v6ops] privacy point re. unsolicited NA / router neighbor cache
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/v6ops/>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 23 Jul 2019 19:49:21 -0000


> On Jul 23, 2019, at 7:30 AM, David Lamparter <equinox@diac24.net> wrote:
> 
> I'm happy to agree that in most cases multicast will be broadcast

Technically, I think it is fair to say that, at least on anything called "Ethernet", multicast is a filter that reviews received broadcasts. The message either arrives at an end node or not. Unicast goes to a specific node or goes nowhere at all, and broadcast is the service that gets it to all of them. The end node then looks at the first 48 bits received, and either stores the message or doesn't based on its configuration. Multicast is broadcast with that filter.

Speaking from the perspective of someone who has written several drivers for such interfaces, it is a little amazing that the configuration of the multicast filter seems to not be a ubiquitous feature. But apparently it is not.

v2.23.0 | Report a Bug | By Email