Re: [OSPF] "OSPF Link Overhead" - draft-ietf-ospf-link-overload-01

Shraddha Hegde <shraddha@juniper.net> Thu, 30 June 2016 13:27 UTC

Return-Path: <shraddha@juniper.net>
X-Original-To: ospf@ietfa.amsl.com
Delivered-To: ospf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DB44612D9E1; Thu, 30 Jun 2016 06:27:35 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.903
X-Spam-Level:
X-Spam-Status: No, score=-1.903 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=junipernetworks.onmicrosoft.com
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 Q0VTH2tLwDQ1; Thu, 30 Jun 2016 06:27:34 -0700 (PDT)
Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0116.outbound.protection.outlook.com [207.46.100.116]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 213B112D9C4; Thu, 30 Jun 2016 06:27:31 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=junipernetworks.onmicrosoft.com; s=selector1-juniper-net; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=nWUzvAXmAenhUTtZiAXw9HN9QW5S8cTqTB0VEQK9nQo=; b=FGl+BeHRpLwQZEKkwaCW+RwT2Gh3bY68vEb74Qs8/hp7eh/3w9fNOhBIBR6NBEQwaj/4UWQ9IpQmNjERCco7Hf2kMVAfpnOY3KNnucNgo8/d41aPWXrMo5qyoKOgf+8Ea4oPPvBGhxgwCUSUcAF62MTHvK+z+fi/sNHJ0iir5KQ=
Received: from BN3PR05MB2706.namprd05.prod.outlook.com (10.167.2.135) by BN3PR05MB2705.namprd05.prod.outlook.com (10.167.2.134) with Microsoft SMTP Server (TLS) id 15.1.528.16; Thu, 30 Jun 2016 13:27:28 +0000
Received: from BN3PR05MB2706.namprd05.prod.outlook.com ([10.167.2.135]) by BN3PR05MB2706.namprd05.prod.outlook.com ([10.167.2.135]) with mapi id 15.01.0528.020; Thu, 30 Jun 2016 13:27:28 +0000
From: Shraddha Hegde <shraddha@juniper.net>
To: "Acee Lindem (acee)" <acee@cisco.com>, "draft-ietf-ospf-link-overload@ietf.org" <draft-ietf-ospf-link-overload@ietf.org>
Thread-Topic: [OSPF] "OSPF Link Overhead" - draft-ietf-ospf-link-overload-01
Thread-Index: AQHR0HyFHYsn+P+9Y0uR9BNlktlqA6ACBGfg
Date: Thu, 30 Jun 2016 13:27:28 +0000
Message-ID: <BN3PR05MB2706633B6931EC6B9AF11879D5240@BN3PR05MB2706.namprd05.prod.outlook.com>
References: <D396A9E5.66CDD%acee@cisco.com>
In-Reply-To: <D396A9E5.66CDD%acee@cisco.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: spf=none (sender IP is ) smtp.mailfrom=shraddha@juniper.net;
x-originating-ip: [116.197.184.10]
x-ms-office365-filtering-correlation-id: 010d1e1b-ef3b-4025-34cf-08d3a0ea483a
x-microsoft-exchange-diagnostics: 1; BN3PR05MB2705; 6:DUiwR5LCUM0KqA78fY6GGtBzgqEzwD30M+PV1cpymbH6aPTLfyPBRLcQvmJrZf61qoHa8px9gE52musun0OTt/uMzobgVqX1RggRh32IupMNqMvQRmOzxdmMBOVLciz4GZDUVESB/H/IR5Nt93rIuCRkXM4zhovCNRHhtzY+geTm3+gPjq6vN2A3nNnyJRDOULSrrX/qqoAGfNi0wmFWlD1xCCWkL0vYBysmFphOy+MdwtN5T1Gx6Uw/joHeFzrWxHZgV+ShBceG0yBAU/f6TFfbkBpfmEgHys/d6GihhSmLaGwuxbkRRFVxEwpzNTFqbvDt3Zlkk1ARA/8bhkZ4XA==; 5:8QUGV+R1TMgrdNsynm069+/s83KgPQIClKdMBEPBYTnwAGPkUdLkAeWr4fpTrbsThPYtrHcgUqpYuTdaaDdE4ATayKH7AVrzkGXYY7AWCwSFvYT2Av5LEcy+ozV2s1HnOV/+bBo15DfCMRS0ebeGUA==; 24:Q0FG5tdding6ZieBbPjonsEVB6vGC6R2CcMihfzItyQwTblyv85HDEVMFesPzsGNGqtzv+SsLpBB6mJDAbqPqyPEkJ/EUNT2cGIt8yQhDUU=; 7:OH1BSreHkxWQ+vvCQALdBKkARQVWES/laETyDqQ0FISrhCzdjcT0t3HB9kSAJuTZ5ApV7MumR9/NchH7OUNksioyjdIMcJpSnEhRLKnYZf+dUag0UgnJG7P3510CWJDblbnklaXv/aSAZ2JYN0AAhlkck9P+nOotfPxw5goQt3jYXArXntAA4Hv5xlICQnf5nKh6kYkHKSBm/IXDnpe1UW/iKxOgliuTbaDmxXmrZMVWTHk0a5PVrSYDE06tp4rU
x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BN3PR05MB2705;
x-microsoft-antispam-prvs: <BN3PR05MB2705A73C5421BF966E2E83C1D5240@BN3PR05MB2705.namprd05.prod.outlook.com>
x-exchange-antispam-report-test: UriScan:(95692535739014);
x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(601004)(2401047)(5005006)(8121501046)(3002001)(10201501046)(6055026); SRVR:BN3PR05MB2705; BCL:0; PCL:0; RULEID:; SRVR:BN3PR05MB2705;
x-forefront-prvs: 0989A7979C
x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(6009001)(7916002)(24454002)(13464003)(377454003)(199003)(189002)(92566002)(74316001)(122556002)(87936001)(2501003)(189998001)(8936002)(86362001)(97736004)(5001770100001)(6116002)(11100500001)(102836003)(3846002)(586003)(76576001)(10400500002)(99286002)(101416001)(15975445007)(2950100001)(2900100001)(3280700002)(76176999)(54356999)(50986999)(7736002)(77096005)(9686002)(68736007)(305945005)(4326007)(8676002)(81156014)(81166006)(105586002)(2906002)(33656002)(66066001)(19580405001)(5002640100001)(19580395003)(230783001)(7696003)(106116001)(5003600100003)(106356001)(7846002)(3660700001); DIR:OUT; SFP:1102; SCL:1; SRVR:BN3PR05MB2705; H:BN3PR05MB2706.namprd05.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en;
received-spf: None (protection.outlook.com: juniper.net does not designate permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: juniper.net
X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Jun 2016 13:27:28.3096 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR05MB2705
Archived-At: <https://mailarchive.ietf.org/arch/msg/ospf/FB0wUGn2ilY_9Y5TfRrN8NyEMac>
Cc: OSPF WG List <ospf@ietf.org>
Subject: Re: [OSPF] "OSPF Link Overhead" - draft-ietf-ospf-link-overload-01
X-BeenThere: ospf@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: The Official IETF OSPG WG Mailing List <ospf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ospf>, <mailto:ospf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ospf/>
List-Post: <mailto:ospf@ietf.org>
List-Help: <mailto:ospf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ospf>, <mailto:ospf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 30 Jun 2016 13:27:36 -0000

Acee,

If I understood your comment correctly, you are proposing that there are usecases for "link overload" feature
Where only link local information flooding would suffice so that alternate should be provided in the document.
I agree with you, will update the document and resubmit soon.

Rgds
Shraddha

-----Original Message-----
From: Acee Lindem (acee) [mailto:acee@cisco.com] 
Sent: Monday, June 27, 2016 7:32 PM
To: Acee Lindem (acee) <acee@cisco.com>; draft-ietf-ospf-link-overload@ietf.org
Cc: OSPF WG List <ospf@ietf.org>
Subject: Re: [OSPF] "OSPF Link Overhead" - draft-ietf-ospf-link-overload-01

Speaking as WG co-chair:

I think we can move towards WG last call with this addition. Note that the document needs to be refreshed as it will expire soon.

Thanks,
Acee 

On 6/27/16, 10:00 AM, "OSPF on behalf of Acee Lindem (acee)"
<ospf-bounces@ietf.org on behalf of acee@cisco.com> wrote:

>Speaking as WG member:
>
>One area of mild contention with this draft has been whether the 
>advertisement that the link is being taken out of service needs to be 
>advertised beyond the link endpoint router (which will take the 
>appropriate action of advertising the maximum link metric in the 
>reverse direction). We have gotten somewhat entangled into use case 
>discussions and whether or not this is really necessary.
>
>What I’d like to propose is that offer the alternative of advertising 
>the OSPF RI LSA with link-scope (fully supported by RFC 7770). This 
>way, the advertisement could be restricted to the local link in 
>situations where the knowledge doesn’t really need to go anywhere else. 
>Note that the current text doesn’t prevent this so this is merely a 
>matter of describing the use case.
>
>Thanks,
>Acee
>
>_______________________________________________
>OSPF mailing list
>OSPF@ietf.org
>https://www.ietf.org/mailman/listinfo/ospf