Re: [trill] FGL "safe" mode in fine labels
"Matt Anger (manger)" <manger@cisco.com> Wed, 20 March 2013 21:34 UTC
Return-Path: <manger@cisco.com>
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 F1C7111E80F2 for <trill@ietfa.amsl.com>; Wed, 20 Mar 2013 14:34:44 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.599
X-Spam-Level:
X-Spam-Status: No, score=-9.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, J_BACKHAIR_11=1, RCVD_IN_DNSWL_HI=-8]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id M7MI4DOmOANw for <trill@ietfa.amsl.com>; Wed, 20 Mar 2013 14:34:44 -0700 (PDT)
Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) by ietfa.amsl.com (Postfix) with ESMTP id 3C35811E80E7 for <trill@ietf.org>; Wed, 20 Mar 2013 14:34:44 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2391; q=dns/txt; s=iport; t=1363815284; x=1365024884; h=from:to:cc:subject:date:message-id:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=fRjs86lM9tA7AlGqXEYpZn2Rwdi2cpOxsVQDfvsdzwc=; b=gMXdkmmG3RaNCl2vMuLjwyXbSroWs1Npj1jw2H7/Y2NJeIksvKOwq2WX KmMr2E5dHccA71LdyjLzihftpKYbY3a7c7PykTsyGPnl3o13bBvAODu0U 00LSDGu4SERKGwuYtTTCT1tYTfBiwoHvVPrebacyF1eozP2AJBbn2YWEf k=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AgEFAOMqSlGtJV2b/2dsb2JhbABEhCvBAoFSFnSCJgEEAQEBJBM0CxIBCCIUNwslAgQBDQUIiAwBC8JMBI1scjEHgl9hA6digwqBbDw
X-IronPort-AV: E=Sophos;i="4.84,880,1355097600"; d="scan'208";a="189496410"
Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by rcdn-iport-1.cisco.com with ESMTP; 20 Mar 2013 21:34:43 +0000
Received: from xhc-aln-x09.cisco.com (xhc-aln-x09.cisco.com [173.36.12.83]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id r2KLYhv6016862 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Wed, 20 Mar 2013 21:34:43 GMT
Received: from xmb-aln-x01.cisco.com ([fe80::747b:83e1:9755:d453]) by xhc-aln-x09.cisco.com ([173.36.12.83]) with mapi id 14.02.0318.004; Wed, 20 Mar 2013 16:34:43 -0500
From: "Matt Anger (manger)" <manger@cisco.com>
To: Thomas Narten <narten@us.ibm.com>, Radia Perlman <radiaperlman@gmail.com>
Thread-Topic: [trill] FGL "safe" mode in fine labels
Thread-Index: AQHOJZ0Z3AdGVEYRME69fvVq25ZXpZivVg+AgAAGlwCAAAi7gIAABGOA//+wdgA=
Date: Wed, 20 Mar 2013 21:34:16 +0000
Message-ID: <1E5EBBBF1A4EE144BB302199F89D35180CC45BE2@xmb-aln-x01.cisco.com>
In-Reply-To: <201303202119.r2KLJL8X003890@cichlid.raleigh.ibm.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/14.3.2.130206
x-originating-ip: [10.21.94.131]
Content-Type: text/plain; charset="us-ascii"
Content-ID: <C2AB8EE8995C3A4CBEF21F5D674BC0B6@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Cc: "trill@ietf.org" <trill@ietf.org>
Subject: Re: [trill] FGL "safe" mode in fine labels
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: Wed, 20 Mar 2013 21:34:45 -0000
That is not what the spec as I interpret it says. In 2) you can have FGL frames, but they are only allowed to be sent across switches that are FGL-safe. Meaning if you don't have a complete route A<->B where all the in-between switches are FGL-safe, then the frame can NOT be transmitted as FGL. S1----S3 / \ / \ A< >< >B \ / \ / S2----S4 In this example you need one of (S1 and S2) and one of (S3 and S4) to be FGL-safe for FGL frames to be able to go from A<->B So if S1 and S3 are FGL-safe and S2 and S4 are NOT FGL-safe, then the link costs *must* be calculated such that FGL frames always go A->S1->S3->B (and never over S2 and S4 which are NOT FGL-safe) and FGL is ok to be enabled. -Matt On 3/20/13 4:19 PM, "Thomas Narten" <narten@us.ibm.com> wrote: >Radia, > >> No! There isn't any mention in the document of "operating in VL >> mode", whatever it is you might mean by that. > >Operating in "VL mode" (to me) means you don't know anything about FGL >and operate as described in RFC 6325 et al. I.e., the base mode of >operation for TRILL. I think it's useful to define a term like "VL >mode" to describe that behavior to distinguish it from RBs that have >somehow enabled and are using FGL. > >> If R1 is FGL-safe, and if R1's neighbor R2 does not claim to be >>FGL-safe, >> then R1 does not forward FGL frames to R2. R1 does not do anything >> different if some non-neighbor of R1, say R3, is not FGL-safe. > >The above says to me that you now have a TRILL campus where R1 does >process FGL frames and R2 does not. But doesn't that contradict the >model: > >> 1) VL-only (today's deployment), then >> 2) A mixture of VL and FGL-safe, until >> 3) EVERYone upgraded to FGL-safe, then >> 4) FGL-links can be introduced. > >Or maybe we are having a violent agreement? if we are at step 2) >above, then isn't the entire campus operating in "VL mode"? I.e., at >step 2, no one is sending/receiving/processing FGL frames. (Right?) > >It's not until step 3/4 that you see *any* FGL frames being used. And >for that, you can't have *any* RBs still operating only in VL mode - >they *all* have to support FGL. > >What is it that I'm not understanding? > >Thomas > >_______________________________________________ >trill mailing list >trill@ietf.org >https://www.ietf.org/mailman/listinfo/trill
- [trill] FGL "safe" mode in fine labels Thomas Narten
- Re: [trill] FGL "safe" mode in fine labels Radia Perlman
- Re: [trill] FGL "safe" mode in fine labels Thomas Narten
- Re: [trill] FGL "safe" mode in fine labels Radia Perlman
- Re: [trill] FGL "safe" mode in fine labels Thomas Narten
- Re: [trill] FGL "safe" mode in fine labels Donald Eastlake
- Re: [trill] FGL "safe" mode in fine labels Matt Anger (manger)
- Re: [trill] FGL "safe" mode in fine labels Radia Perlman
- Re: [trill] FGL "safe" mode in fine labels Donald Eastlake
- Re: [trill] FGL "safe" mode in fine labels Donald Eastlake
- Re: [trill] FGL "safe" mode in fine labels windy_1
- Re: [trill] FGL "safe" mode in fine labels Thomas Narten
- Re: [trill] FGL "safe" mode in fine labels Radia Perlman
- Re: [trill] FGL "safe" mode in fine labels Donald Eastlake
- Re: [trill] FGL "safe" mode in fine labels Erik Nordmark
- Re: [trill] FGL "safe" mode in fine labels Erik Nordmark