Re: [v6ops] new draft: draft-yc-v6ops-solicited-ra-unicast

Tarko Tikan <tarko@lanparty.ee> Mon, 20 July 2015 19:01 UTC

Return-Path: <tarko@lanparty.ee>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CA2DD1B2B82 for <v6ops@ietfa.amsl.com>; Mon, 20 Jul 2015 12:01:27 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.91
X-Spam-Level:
X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham
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 nyxM-rEN9dYI for <v6ops@ietfa.amsl.com>; Mon, 20 Jul 2015 12:01:26 -0700 (PDT)
Received: from valgus.lanparty.ee (valgus.lanparty.ee [194.126.124.108]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D40FD1B2B58 for <v6ops@ietf.org>; Mon, 20 Jul 2015 12:01:04 -0700 (PDT)
Received: from 89-44-71-217.dyn.internet.emt.ee ([217.71.44.89] helo=[10.129.128.89]) by valgus.lanparty.ee with esmtpsa (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from <tarko@lanparty.ee>) id 1ZHGJC-0005Ev-3m for v6ops@ietf.org; Mon, 20 Jul 2015 22:01:02 +0300
To: v6ops@ietf.org
References: <201507071147.t67Bl13m009348@irp-lnx1.cisco.com> <CAO42Z2x7mNFbB_w_+W+80pY+LeCAKXaOBXMmQvkcaMSWhwW60g@mail.gmail.com> <EF21B630-5D0A-415A-A93F-9058900CC80C@cisco.com> <CAO42Z2zAqMXhBZ2wa=q0wtHGhMpMWU9TSjfFyd2quiki9w0oSw@mail.gmail.com> <85CADAA2-8DF2-4A6B-812B-7A77081936F5@cisco.com> <CAO42Z2w3fOxGJHasKqYZRfGZ2u=7FnZBm+jgLtgDvfZ7HYW=iw@mail.gmail.com> <CAO42Z2z+DwOin23HQTysrZ9dNP924+LQ-vOExmJc_xZUEB4yCQ@mail.gmail.com> <228248C6-94FE-4C9C-A875-F732EFDC6601@cisco.com> <CAAedzxqapiWuy4Gk5t3zEe3XmaLyRc3nc5=aA1ED0tzfeXckbA@mail.gmail.com> <CAKD1Yr3Hn9qJTaM0v3+hr7NfQbLc=mOWYGwrTK-XXxKp5v+dpg@mail.gmail.com>
From: Tarko Tikan <tarko@lanparty.ee>
Message-ID: <55AD455C.2030809@lanparty.ee>
Date: Mon, 20 Jul 2015 22:00:44 +0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1
MIME-Version: 1.0
In-Reply-To: <CAKD1Yr3Hn9qJTaM0v3+hr7NfQbLc=mOWYGwrTK-XXxKp5v+dpg@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Transfer-Encoding: 7bit
X-SA-Exim-Connect-IP: 217.71.44.89
X-SA-Exim-Mail-From: tarko@lanparty.ee
X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:57:07 +0000)
X-SA-Exim-Scanned: Yes (on valgus.lanparty.ee)
Archived-At: <http://mailarchive.ietf.org/arch/msg/v6ops/VvtTRR9kZ5JS2R901P9pj1obTZM>
Subject: Re: [v6ops] new draft: draft-yc-v6ops-solicited-ra-unicast
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.15
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: Mon, 20 Jul 2015 19:01:28 -0000

hey,

> What's the use case for a unicast unsolicited RA? They can only reach
> nodes for which the router knows the IPv6 addresses, and so pretty much
> require that routers keep a lot of state.

Another use case, not directly relevant to this draft, is targeting 
specific nodes for which RA should be injected.

This is required in shared L2 environments where you don't want to 
enable ipv6 for all nodes. This requires router to keep some sort of 
state or use external lookup (radius).

-- 
tarko