Re: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd-discriminator-00.txt

"Nobo Akiya (nobo)" <nobo@cisco.com> Thu, 15 May 2014 14:08 UTC

Return-Path: <nobo@cisco.com>
X-Original-To: isis-wg@ietfa.amsl.com
Delivered-To: isis-wg@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AB3F51A0527; Thu, 15 May 2014 07:08:32 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -115.152
X-Spam-Level:
X-Spam-Status: No, score=-115.152 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.651, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_WHITELIST=-100] 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 ryuu-LWKLQbu; Thu, 15 May 2014 07:08:30 -0700 (PDT)
Received: from rcdn-iport-7.cisco.com (rcdn-iport-7.cisco.com [173.37.86.78]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 54F651A00BE; Thu, 15 May 2014 07:07:49 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=939; q=dns/txt; s=iport; t=1400162863; x=1401372463; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=YTzp1eIJglKY4Z+I9MCrgRT8/MGBAW36xNrBrV0Fuvk=; b=JgaeLhDM8irdpfFLOdUTk7URwkanzzPuQL9bfURsBgUxNwOAdG+/2B2w wA0hh2yyRxESUAtIkhb1COWWDe889PKaJMsIGgmQFga0ZwMqR4SnjBkhK /cmyXd0ZhkhTfh5AZbanj7RX/W6CIhN7s4L9Dsb62AaEtMpweat5ZwkEU k=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AgwFANLJdFOtJV2P/2dsb2JhbABZgmUhgSfFFwGBEBZ0giUBAQEDATo9AgULAgEIIhQQMiUCBAENDYgxCAHRGReOHTEHgyuBFQEDrGWBd4E/gjA
X-IronPort-AV: E=Sophos;i="4.97,1059,1389744000"; d="scan'208";a="325135622"
Received: from rcdn-core-7.cisco.com ([173.37.93.143]) by rcdn-iport-7.cisco.com with ESMTP; 15 May 2014 14:07:17 +0000
Received: from xhc-rcd-x09.cisco.com (xhc-rcd-x09.cisco.com [173.37.183.83]) by rcdn-core-7.cisco.com (8.14.5/8.14.5) with ESMTP id s4FE7GCB010716 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 15 May 2014 14:07:16 GMT
Received: from xmb-aln-x01.cisco.com ([fe80::747b:83e1:9755:d453]) by xhc-rcd-x09.cisco.com ([173.37.183.83]) with mapi id 14.03.0123.003; Thu, 15 May 2014 09:07:16 -0500
From: "Nobo Akiya (nobo)" <nobo@cisco.com>
To: Mach Chen <mach.chen@huawei.com>, Hannes Gredler <hannes@juniper.net>
Thread-Topic: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd-discriminator-00.txt
Thread-Index: AQHPasw+3TfBhqItW0CgAHCwI2S40Zs3F30AgAliegCAABUCAIAAARwAgAACvoD//61T8IAAWImA//+vVVCAAFe9gP//sQWwAC1upQAAAPyhsA==
Date: Thu, 15 May 2014 14:07:15 +0000
Message-ID: <CECE764681BE964CBE1DFF78F3CDD3941E150962@xmb-aln-x01.cisco.com>
References: <20140508144606.23448.98448.idtracker@ietfa.amsl.com> <F3ADE4747C9E124B89F0ED2180CC814F23D873B9@xmb-aln-x02.cisco.com> <9DDF3832-A276-40F1-AF24-2CEAB31E63DC@juniper.net> <F3ADE4747C9E124B89F0ED2180CC814F23DB5518@xmb-aln-x02.cisco.com> <922372D3-6CE8-461E-9BD4-94C2B050C37D@juniper.net> <20140514153641.GC13993@pfrc> <CECE764681BE964CBE1DFF78F3CDD3941E14ED44@xmb-aln-x01.cisco.com> <20140514155739.GA14148@juniper.net> <CECE764681BE964CBE1DFF78F3CDD3941E14EDA1@xmb-aln-x01.cisco.com> <7F0CA0C7-CFD2-4B51-BA0A-A7F167B05B42@juniper.net> <CECE764681BE964CBE1DFF78F3CDD3941E14EE6A@xmb-aln-x01.cisco.com> <F73A3CB31E8BE34FA1BBE3C8F0CB2AE25D9C4A26@SZXEMA510-MBX.china.huawei.com>
In-Reply-To: <F73A3CB31E8BE34FA1BBE3C8F0CB2AE25D9C4A26@SZXEMA510-MBX.china.huawei.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [161.44.212.77]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Archived-At: http://mailarchive.ietf.org/arch/msg/isis-wg/NDvpDP7kSN23eFAsYRTTj4VTqr4
Cc: Jeffrey Haas <jhaas@pfrc.org>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>
Subject: Re: [Isis-wg] New Version Notification for draft-ginsberg-isis-sbfd-discriminator-00.txt
X-BeenThere: isis-wg@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: IETF IS-IS working group <isis-wg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/isis-wg>, <mailto:isis-wg-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/isis-wg/>
List-Post: <mailto:isis-wg@ietf.org>
List-Help: <mailto:isis-wg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/isis-wg>, <mailto:isis-wg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 15 May 2014 14:08:32 -0000

Hi Mach, Hannes, et al,

> IMHO, the capability issue should not be a S-BFD specific issue, even not
> BFD specified issue. It is actually a forwarding capability issue, it is about
> whether the target node can process IPv4, IPv6, MPLS, SR encapsulated BFD
> packets.

I agree Mach, mostly :)

I can also see one arguing that forwarding supporting X does not always mean S-BFD is supported on X. If we want to address this, then it is an S-BFD specific issue, and we _may_ want to solve this via introducing S-BFD capability advertisements.

With that said, S-BFD discriminator advertisement is one area which the capability problem can be solved, but not necessary a problem that has to be solved with S-BFD discriminator advertisement. Rather I don't think the two should be bundled together.

Let us continue the capability discussion separate from the discriminator advertisements?

-Nobo