IETF Logo Mail Archive

Re: [mpls] Mode negotiation for PSC

Huub van Helvoort <huubatwork@gmail.com> Mon, 12 August 2013 20:08 UTC

Return-Path: <huubatwork@gmail.com>
X-Original-To: mpls@ietfa.amsl.com
Delivered-To: mpls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8B0AB21F9A35 for <mpls@ietfa.amsl.com>; Mon, 12 Aug 2013 13:08:55 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.299
X-Spam-Level:
X-Spam-Status: No, score=-2.299 tagged_above=-999 required=5 tests=[AWL=-0.300, BAYES_00=-2.599, J_CHICKENPOX_14=0.6]
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 63ZLD9huqeqW for <mpls@ietfa.amsl.com>; Mon, 12 Aug 2013 13:08:54 -0700 (PDT)
Received: from mail-ea0-x235.google.com (mail-ea0-x235.google.com [IPv6:2a00:1450:4013:c01::235]) by ietfa.amsl.com (Postfix) with ESMTP id 99F2F21F9A38 for <mpls@ietf.org>; Mon, 12 Aug 2013 13:08:53 -0700 (PDT)
Received: by mail-ea0-f181.google.com with SMTP id d10so3705288eaj.40 for <mpls@ietf.org>; Mon, 12 Aug 2013 13:08:49 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:disposition-notification-to:date:from:reply-to :user-agent:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=ABZNQY1FsVVWOquk1qu54pS9IeTNAmCfaxgXqVt247c=; b=W50keVTVo8jWs/hV4bIc/5HtXW4AGpfsZrMjlhCCdIGWSyL8qoDC3qixKNHygEQZOU yzUZ8B0pRArn0EdYPINmIdfX+D6+IRCzB3+3yz+zaA4ro0lle5Q1awnTtpyQtHnV8coR cxt6cGGHcmk0cywKdBfHgffFfY7fXYvj5n2vK2IU7ICVmNl2zGo+93PUGSgbOJ1SnpGt 1KqQAAR/PW9Hr2dbVjKIFlorzUUI8ZYC1gwa2ujw8oVRtrHt2YaUzFPc2CzadY2R2ELQ MrYR3BaJ+jEmoOq2j9ni55NO61Ie8xQr0I0CXUVZ7sbbgU9y45W+VJuOzIGBBFOIoDIJ arxg==
X-Received: by 10.14.198.73 with SMTP id u49mr829309een.13.1376338129667; Mon, 12 Aug 2013 13:08:49 -0700 (PDT)
Received: from McAsterix.local (g215085.upc-g.chello.nl. [80.57.215.85]) by mx.google.com with ESMTPSA id bp43sm60178873eeb.4.2013.08.12.13.08.48 for <mpls@ietf.org> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 12 Aug 2013 13:08:49 -0700 (PDT)
Message-ID: <520940D0.5010301@gmail.com>
Date: Mon, 12 Aug 2013 22:08:48 +0200
From: Huub van Helvoort <huubatwork@gmail.com>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130801 Thunderbird/17.0.8
MIME-Version: 1.0
To: mpls@ietf.org
References: <20ECF67871905846A80F77F8F4A27572102C229B@xmb-rcd-x09.cisco.com> <52089C6A.1060104@pi.nu>
In-Reply-To: <52089C6A.1060104@pi.nu>
Content-Type: text/plain; charset="UTF-8"; format="flowed"
Content-Transfer-Encoding: 8bit
Subject: Re: [mpls] Mode negotiation for PSC
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
Reply-To: huubatwork@gmail.com
List-Id: Multi-Protocol Label Switching WG <mpls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mpls>, <mailto:mpls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mpls>
List-Post: <mailto:mpls@ietf.org>
List-Help: <mailto:mpls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mpls>, <mailto:mpls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 12 Aug 2013 20:08:55 -0000

Hej Loa,

You wondered:

> On 2013-08-08 14:34, Eric Osborne (eosborne) wrote:
> <snip>
>
>> Example of method 2
>> -------------------
>> Both Node A and Node Z announce two things - Capabilities and Mask.
>> Capabilities is a bitmap of the capabilities that are supported.
>> Mask is a mask of don't-care bits against the Capabilities string.  A
>> 0 in Mask means "I don't care if we do this capability or not", and a
>> 1 means "we must (or must not) agree on this capability in order to
>> come up".
>>
>> A.capabilities = 00000
>> A.mask         = 00000
>
> Why is this not
>
>   A.capabilities = 11111
>   A.mask         = 00000
>
> ?

This latter is indeed what node A should indicate for
  "I am capable of supporting all capabilities and I don't
   care if we do any of them or not"

Regards, Huub.


-- 
*****************************************************************
               请记住，你是独一无二的，就像其他每一个人一样

v2.23.0 | Report a Bug | By Email