IETF Logo Mail Archive

Re: [CCAMP] Network Assigned Upstream Label - Draft Update

"Giovanni Martinelli (giomarti)" <giomarti@cisco.com> Fri, 28 February 2014 14:36 UTC

Return-Path: <giomarti@cisco.com>
X-Original-To: ccamp@ietfa.amsl.com
Delivered-To: ccamp@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5CBA41A07E6 for <ccamp@ietfa.amsl.com>; Fri, 28 Feb 2014 06:36:20 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -15.047
X-Spam-Level:
X-Spam-Status: No, score=-15.047 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.547, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] 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 CQV4Q7H8QzAN for <ccamp@ietfa.amsl.com>; Fri, 28 Feb 2014 06:36:18 -0800 (PST)
Received: from rcdn-iport-3.cisco.com (rcdn-iport-3.cisco.com [173.37.86.74]) by ietfa.amsl.com (Postfix) with ESMTP id 006AC1A077E for <ccamp@ietf.org>; Fri, 28 Feb 2014 06:36:17 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=15393; q=dns/txt; s=iport; t=1393598176; x=1394807776; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=a0H5Vy/Rd+or2b9/flChY/7AIX0J0FpsgvQQ1UleE4I=; b=BAQ60JZGogACyWe/YAFjQJglvbOBVsx8mUw2hFHcx3ouFCVGqoDOfVGf eWEEhwbnMpNzoaOt3yk44/lmVRQqOJWXoLKh2a9KQXMhd+2RQ46eL5Igi SCb7qkUs6f8yTfAkQAsIuDciiu8UyQlgpVstze3VyhXhbfOGLI0M8BHd8 E=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AisFACqeEFOtJXG//2dsb2JhbABagkJEO1e4QohdgRMWdIIlAQEBBHkQAgEIEQQBASgHIREUCQgCBA4FG4dKAxENxCYNhwwXjD+CFgYBgyOBFASWTYFtgTKLMYVIgy2CKg
X-IronPort-AV: E=Sophos; i="4.97,562,1389744000"; d="scan'208,217"; a="307224972"
Received: from rcdn-core2-4.cisco.com ([173.37.113.191]) by rcdn-iport-3.cisco.com with ESMTP; 28 Feb 2014 14:36:16 +0000
Received: from xhc-rcd-x13.cisco.com (xhc-rcd-x13.cisco.com [173.37.183.87]) by rcdn-core2-4.cisco.com (8.14.5/8.14.5) with ESMTP id s1SEaFRm005768 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 28 Feb 2014 14:36:15 GMT
Received: from xmb-rcd-x14.cisco.com ([169.254.4.212]) by xhc-rcd-x13.cisco.com ([173.37.183.87]) with mapi id 14.03.0123.003; Fri, 28 Feb 2014 08:36:15 -0600
From: "Giovanni Martinelli (giomarti)" <giomarti@cisco.com>
To: John E Drake <jdrake@juniper.net>
Thread-Topic: [CCAMP] Network Assigned Upstream Label - Draft Update
Thread-Index: AQHPMdsUqW49vINDCkW/awk6nMLomJrGMiKAgAAgTQCAA9lggIAA1cMAgAAHuACAAASDgIAAF+4A
Date: Fri, 28 Feb 2014 14:36:15 +0000
Message-ID: <4DC0F48B-7E11-49F3-8BD8-DA3E727E7CD7@cisco.com>
References: <CA+YzgTuUQzfjnjTWdya7xgpytB+nBvY_d-Sx4faqUJY3Md9h5Q@mail.gmail.com> <CF323F23.9C8CD%zali@cisco.com> <CA+YzgTtxz-aQXx8d5EV0kP05DV9NCAdUdbAmV0pK7nECo+KvFw@mail.gmail.com> <9EF94792-38EE-4671-833A-D5FC1F7FFE3C@cisco.com> <8456f073b7914ce383016978f1f170ce@BLUPR05MB562.namprd05.prod.outlook.com>
In-Reply-To: <8456f073b7914ce383016978f1f170ce@BLUPR05MB562.namprd05.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [144.254.172.244]
Content-Type: multipart/alternative; boundary="_000_4DC0F48B7E1149F38BD8DA3E727E7CD7ciscocom_"
MIME-Version: 1.0
Archived-At: http://mailarchive.ietf.org/arch/msg/ccamp/eJwUMwpNgO0D_4ABBWifzj4oQ_w
Cc: "ccamp@ietf.org" <ccamp@ietf.org>
Subject: Re: [CCAMP] Network Assigned Upstream Label - Draft Update
X-BeenThere: ccamp@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Discussion list for the CCAMP working group <ccamp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ccamp>, <mailto:ccamp-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ccamp/>
List-Post: <mailto:ccamp@ietf.org>
List-Help: <mailto:ccamp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ccamp>, <mailto:ccamp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 28 Feb 2014 14:36:20 -0000

Hi John,

yes clear,  I was just bringing back on the table discussion we got on the same problem. The second option in better (although contention window is reduced but not avoided) however we had no numbers to justify  that such optimization or … at least not so strong  reasons to update a mechanism that was proven to work.

Cheers
G


On 28 Feb 2014, at 14:10, John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>> wrote:

Giovanni,

Use of acceptable doubles the signaling overhead and opens up a contention window:

1)      Path
2)      Path_err w/ acceptable label
3)      Contention window
4)      Path w/ acceptable label
5)      Resv

Versus:

1)      Path w/ downstream assigned label request
2)      Resv w/ downstream assigned label

Also, it’s generally considered a bad idea™ to include error messages in the normal operation of a protocol

Yours Irrespectively,

John

From: CCAMP [mailto:ccamp-bounces@ietf.org] On Behalf Of Giovanni Martinelli (giomarti)
Sent: Friday, February 28, 2014 4:54 AM
To: Vishnu Pavan Beeram
Cc: ccamp@ietf.org<mailto:ccamp@ietf.org>
Subject: Re: [CCAMP] Network Assigned Upstream Label - Draft Update

Hi Vishnu,

On 28 Feb 2014, at 13:26, Vishnu Pavan Beeram <vishnupavan@gmail.com<mailto:vishnupavan@gmail.com>> wrote:


(2) The use of Label-Set/Acceptable Label-Set was meant to be used for exceptions. Using it always for every setup request is a compromised solution.


At the time we discussed the wson signaling (http://tools.ietf.org/html/draft-ietf-ccamp-wson-signaling-06), the acceptable label set was considered good enough. Not sure it comes into play at every request since your label_set should have reasonably good labels.

Cheers
G

v2.23.0 | Report a Bug | By Email