Re: [trill] Query on rbridgeSnoopingPortEntry in draft-ietf-trill-rbridge-mib

Anil R <anil@charter.net> Fri, 12 October 2012 14:23 UTC

Return-Path: <anil@charter.net>
X-Original-To: trill@ietfa.amsl.com
Delivered-To: trill@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9E87421F84CD for <trill@ietfa.amsl.com>; Fri, 12 Oct 2012 07:23:52 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.599
X-Spam-Level:
X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[AWL=0.001, BAYES_00=-2.599]
Received: from mail.ietf.org ([64.170.98.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xpLg5+nhlWsy for <trill@ietfa.amsl.com>; Fri, 12 Oct 2012 07:23:52 -0700 (PDT)
Received: from mta21.charter.net (mta21.charter.net [216.33.127.81]) by ietfa.amsl.com (Postfix) with ESMTP id E0F8B21F849C for <trill@ietf.org>; Fri, 12 Oct 2012 07:23:51 -0700 (PDT)
Received: from imp11 ([10.20.200.11]) by mta21.charter.net (InterMail vM.8.01.05.02 201-2260-151-103-20110920) with ESMTP id <20121012142350.HMKO12025.mta21.charter.net@imp11>; Fri, 12 Oct 2012 10:23:50 -0400
Received: from [192.168.1.107] ([66.189.33.199]) by imp11 with smtp.charter.net id AEPo1k00S4Hn1RN05EPqFM; Fri, 12 Oct 2012 10:23:50 -0400
X-Authority-Analysis: v=1.1 cv=Mv9Cy8NsQItTEAHnXr6fCNbI23lcrkmyMeqLv9HU3yU= c=1 sm=1 a=y6CczY8QmW8A:10 a=yUnIBFQkZM0A:10 a=kj9zAlcOel0A:10 a=EiiBzwjGkpP7seHRDOKx7g==:17 a=48vgC7mUAAAA:8 a=TOklwo6KUbc6Vo4fjCQA:9 a=CjuIK1q_8ugA:10 a=lZB815dzVvQA:10 a=EiiBzwjGkpP7seHRDOKx7g==:117
Mime-Version: 1.0 (Apple Message framework v1283)
Content-Type: text/plain; charset=us-ascii
From: Anil R <anil@charter.net>
In-Reply-To: <CA+7+8TSqrW7vuHneeVzyi1g7Wcy9YYuubMV2WecB71po8+1CdA@mail.gmail.com>
Date: Fri, 12 Oct 2012 10:23:49 -0400
Content-Transfer-Encoding: quoted-printable
Message-Id: <6B477636-3892-4666-AE8B-3D6BAE8A917D@charter.net>
References: <CA+7+8TSqrW7vuHneeVzyi1g7Wcy9YYuubMV2WecB71po8+1CdA@mail.gmail.com>
To: wenyu zou <nkzouwenyu@gmail.com>
X-Mailer: Apple Mail (2.1283)
Cc: trill@ietf.org
Subject: Re: [trill] Query on rbridgeSnoopingPortEntry in draft-ietf-trill-rbridge-mib
X-BeenThere: trill@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: "Developing a hybrid router/bridge." <trill.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/trill>, <mailto:trill-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/trill>
List-Post: <mailto:trill@ietf.org>
List-Help: <mailto:trill-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/trill>, <mailto:trill-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 12 Oct 2012 14:23:52 -0000

Hi Wenyu,

The purpose of rbridgeSnoopingPortTable is only to show which RBridge ports have at least one multicast router connected, and hence need to be included in forwarding of multicast packets. Exactly how many multicast routers are there on a port is not important for this table. The purpose is not to give a list of multicast routers, but a list of ports on which at least one multicast router has been detected. You need only one multicast router on a port, for that port to be included in the list of ports where IP multicast is forwarded. Hence, the value of the IP address in this table can be any one of the routers that has been detected on that port.

This is not a IP Multicast snooping MIB, so you will not have all IP Multicast snooping information included in this group. You will get only the multicast snooping information relevant to the operation of a TRILL switch/RBridge.

Regards,
Anil

On Oct 8, 2012, at 8:52 AM, wenyu zou wrote:

> Hi Authors,
>    I have a questions about rbridgeSnoopingPortEntry in
> draft-ietf-trill-rbridge-mib, which is indexed by rbridgeBasePort. For
> one port, it maybe have many Multicast Routers in different VLANs. The
> current structure of rbridgeSnoopingPortEntry set a limitation that
> there is only one Multicast Router for one port. Why don't
> rbridgeSnoopingPortEntry indexed by rbridgeVlanIndex like
> rbridgeSnoopingAddrEntry?
> 
> Thanks.
> Regards,
> wenyu
> _______________________________________________
> trill mailing list
> trill@ietf.org
> https://www.ietf.org/mailman/listinfo/trill