IETF Logo Mail Archive

RE: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt

Dmitry Anipko <Dmitry.Anipko@microsoft.com> Fri, 17 January 2014 18:39 UTC

Return-Path: <Dmitry.Anipko@microsoft.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7A03E1AD73F for <ipv6@ietfa.amsl.com>; Fri, 17 Jan 2014 10:39:30 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.601
X-Spam-Level:
X-Spam-Status: No, score=-2.601 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] 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 8lB9XCXzAJys for <ipv6@ietfa.amsl.com>; Fri, 17 Jan 2014 10:39:29 -0800 (PST)
Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2lp0242.outbound.protection.outlook.com [207.46.163.242]) by ietfa.amsl.com (Postfix) with ESMTP id 035B11ACC87 for <ipv6@ietf.org>; Fri, 17 Jan 2014 10:39:28 -0800 (PST)
Received: from SN2PR03MB077.namprd03.prod.outlook.com (10.255.175.153) by SN2PR03MB079.namprd03.prod.outlook.com (10.255.175.155) with Microsoft SMTP Server (TLS) id 15.0.847.13; Fri, 17 Jan 2014 18:39:15 +0000
Received: from SN2PR03MB077.namprd03.prod.outlook.com ([169.254.14.253]) by SN2PR03MB077.namprd03.prod.outlook.com ([169.254.14.253]) with mapi id 15.00.0847.008; Fri, 17 Jan 2014 18:39:15 +0000
From: Dmitry Anipko <Dmitry.Anipko@microsoft.com>
To: Lorenzo Colitti <lorenzo@google.com>, Ole Troan <otroan@employees.org>
Subject: RE: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt
Thread-Topic: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt
Thread-Index: AQHPDmY2hGYF66RRbk+N6Vv6p523J5qDMmwwgAATMeCABOYbYIAAiLsAgAABWYCAAJJtcA==
Date: Fri, 17 Jan 2014 18:39:15 +0000
Message-ID: <2c30d818adc447b2a0ca3a7f0556ee65@SN2PR03MB077.namprd03.prod.outlook.com>
References: <20140111004402.10451.90724.idtracker@ietfa.amsl.com> <BF6E0BD839774345977891C597F8B50C5CE74C@eusaamb109.ericsson.se> <72381AF1F18BAE4F890A0813768D992817FCA84E@sdcexchms.au.logicalis.com> <892FB91E-311D-4A50-A38B-4972F70847AB@employees.org> <CAKD1Yr2CLUmTYTNAj2_bkP=f3xeBCZ2g=9Sr0D-GvtRgxmfC3g@mail.gmail.com>
In-Reply-To: <CAKD1Yr2CLUmTYTNAj2_bkP=f3xeBCZ2g=9Sr0D-GvtRgxmfC3g@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [2001:4898:80e0:ee43::2]
x-forefront-prvs: 0094E3478A
x-forefront-antispam-report: SFV:NSPM; SFS:(10009001)(689001)(679001)(779001)(377454003)(189002)(199002)(24454002)(74366001)(74662001)(53806001)(54356001)(76482001)(77096001)(2656002)(81686001)(81342001)(80976001)(87936001)(87266001)(56816005)(85852003)(65816001)(81816001)(51856001)(74502001)(31966008)(33646001)(74706001)(90146001)(76796001)(76786001)(47446002)(83072002)(76576001)(50986001)(74316001)(19300405004)(15202345003)(79102001)(74876001)(19580405001)(69226001)(47736001)(46102001)(54316002)(59766001)(15975445006)(85306002)(81542001)(77982001)(49866001)(19580395003)(19609705001)(80022001)(92566001)(63696002)(4396001)(56776001)(93136001)(47976001)(16236675002)(83322001)(93516002)(3826001)(24736002); DIR:OUT; SFP:1101; SCL:1; SRVR:SN2PR03MB079; H:SN2PR03MB077.namprd03.prod.outlook.com; CLIP:2001:4898:80e0:ee43::2; FPR:; RD:InfoNoRecords; MX:1; A:1; LANG:en;
Content-Type: multipart/alternative; boundary="_000_2c30d818adc447b2a0ca3a7f0556ee65SN2PR03MB077namprd03pro_"
MIME-Version: 1.0
X-OriginatorOrg: microsoft.com
Cc: 6man WG <ipv6@ietf.org>, Ing-Wher Chen <ing-wher.chen@ericsson.com>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.15
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: <http://www.ietf.org/mail-archive/web/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: Fri, 17 Jan 2014 18:39:30 -0000

>> There are basically two solicited-node groups per host

Does this assume that typically there are only 2 non link-local IPv6 addresses  per host? (since different addresses are unlikely to fall in the same group, as long as they have different interface identifiers)

From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Lorenzo Colitti
Sent: Friday, January 17, 2014 1:49 AM
To: Ole Troan
Cc: Ing-Wher Chen; 6man WG
Subject: Re: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt

On Fri, Jan 17, 2014 at 1:43 AM, Ole Troan <otroan@employees.org<mailto:otroan@employees.org>> wrote:
I hear that MLD snooping for the solicited-node multicast groups isn't supported in most (if not all) switches.
partly because MLD snooping doesn't work well, but also because it becomes very costly to support state for this many multicast groups.

On wifi networks, I don't see why that would be. There are basically two solicited-node groups per host, and wifi access points already track lots of state on a per-MAC address basis.

v2.26.15 | Report a Bug | By Email | System Status