Re: [OSPF] OSPFv2 SR draft

Chris Bowers <cbowers@juniper.net> Wed, 03 August 2016 14:46 UTC

Return-Path: <cbowers@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 0BED212DABD for <ospf@ietfa.amsl.com>; Wed, 3 Aug 2016 07:46:02 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.922
X-Spam-Level:
X-Spam-Status: No, score=-1.922 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_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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 H2oobeae0zdZ for <ospf@ietfa.amsl.com>; Wed, 3 Aug 2016 07:45:59 -0700 (PDT)
Received: from NAM03-CO1-obe.outbound.protection.outlook.com (mail-co1nam03on0108.outbound.protection.outlook.com [104.47.40.108]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 91F9612D66B for <ospf@ietf.org>; Wed, 3 Aug 2016 07:45:48 -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=heMU1reIFW4+kIvswBSYpEPvMxbLfr3DjPEe1kyIZUs=; b=AXpLxvPbS1pY49M+HZeD61bLvOkjCQCgr2p91ixz8wdWMkw0nUPQYDeh9A059ItfPPZ6D9QnrSSWi7jP3WwX3UKPJcBVv1/8p7XARpvRg+fBFvu0WQ9fLEKL6SeUY9AX8IE/X9GyIRxhSZ+AcjvMWPomcJbgzcx7bW5dX6a2pDU=
Received: from MWHPR05MB2829.namprd05.prod.outlook.com (10.168.245.11) by MWHPR05MB2830.namprd05.prod.outlook.com (10.168.245.12) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P384) id 15.1.557.8; Wed, 3 Aug 2016 14:45:46 +0000
Received: from MWHPR05MB2829.namprd05.prod.outlook.com ([10.168.245.11]) by MWHPR05MB2829.namprd05.prod.outlook.com ([10.168.245.11]) with mapi id 15.01.0557.009; Wed, 3 Aug 2016 14:45:46 +0000
From: Chris Bowers <cbowers@juniper.net>
To: Peter Psenak <ppsenak@cisco.com>, OSPF List <ospf@ietf.org>
Thread-Topic: [OSPF] OSPFv2 SR draft
Thread-Index: AQHR4/NCxEmNaMtLk0SvZpHsNgIxfaA3X9Hw
Date: Wed, 3 Aug 2016 14:45:45 +0000
Message-ID: <MWHPR05MB2829B34A5B8AB2F4489DC2AFA9060@MWHPR05MB2829.namprd05.prod.outlook.com>
References: <5791D96B.6080907@cisco.com>
In-Reply-To: <5791D96B.6080907@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=cbowers@juniper.net;
x-originating-ip: [66.129.239.12]
x-ms-office365-filtering-correlation-id: 88e5fc3f-d381-4a0e-bb1e-08d3bbacda5f
x-microsoft-exchange-diagnostics: 1; MWHPR05MB2830; 6:Wk571XpuDlt95AAqHQvMTmc3MrgMavzy3+xtZuoabQR/57Dgj307lKLRpvR4il8UFMjclzg55NDdUc3mRrvMKzvGZUp7XNl97+m5tDw2VPZGgdnt9lgYpAnwF+XRYFuvni7Xf8HXkadKUVFiLixDYRt5tvtVrwSr1GTjYBEMMMoxY8fNfonwX9/v2cwtY2OMylg5zBo2sw9XAp1wB1ohJgAlA/l+gbUnWTlaEj/I4V9yoYPaTdH3pBuZIKen+rYslbRT9no5u4iV5VvVeCMIsk0Uk5ui6UVwxfXQ71EaLhLbGp0MWNdDpO0Y6P6sn6MhulRlxJ5SlbiCn3DLsalFTA==; 5:vIR5ftdccp5VgOT767obMe/jXn1yy/ZC09k2N8r+9S/fIf7VAmeDXovRrd5P90BClIpGe8xbCgevL5ZrjHiSlb8O5t7HDvs/Nv05948Zzx4dkCy5ZFbZb1tULn75KGM0ruzQsaq4P5t+K3/ioNwzgA==; 24:dzNn9Tm5Cpt35pimm5fweFWughQf0gycNsRmCUczWCdbQlD7nh1wGqYTSSCsEGihiFXda+zdnC6SJlMSAYk9w5p9RDYH+PJt4QxDurC6Aug=; 7:WV2IMVehCkWW+h+g/DPHGm4oXtlGk23UVGYe0mYuKfsHKMhWm7JbdbZilNXVJ+xVlTTErhpLS07iITPwd/U9xrMYJBy46ONQUrUTXyg3BC+fyEbI/mmEXZ9ftbV4j71Wk9lPy3k3bPjGkFUOQrcg4wTUSkR1Nl7YN+J81qsajZ95znExkXsuy9uyr5zKCoqZqWsoZei10x3CYV15jpiEdXR/6WEPsMomcacY6AMwwAXTXvz7SEzaFsYm7JX42TKM
x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:MWHPR05MB2830;
x-microsoft-antispam-prvs: <MWHPR05MB2830F3BE3FF4C98B6611212FA9060@MWHPR05MB2830.namprd05.prod.outlook.com>
x-exchange-antispam-report-test: UriScan:;
x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(601004)(2401047)(8121501046)(5005006)(10201501046)(3002001)(6055026); SRVR:MWHPR05MB2830; BCL:0; PCL:0; RULEID:; SRVR:MWHPR05MB2830;
x-forefront-prvs: 00235A1EEF
x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(6009001)(7916002)(199003)(13464003)(377454003)(53754006)(189002)(102836003)(3846002)(101416001)(586003)(6116002)(86362001)(3660700001)(97736004)(106356001)(87936001)(11100500001)(50986999)(122556002)(92566002)(7846002)(99286002)(107886002)(76176999)(105586002)(33656002)(10400500002)(5001770100001)(2906002)(81166006)(54356999)(305945005)(77096005)(189998001)(76576001)(66066001)(74316002)(81156014)(2950100001)(9686002)(8936002)(15975445007)(5002640100001)(19580405001)(19580395003)(8676002)(106116001)(2900100001)(7696003)(68736007)(7736002)(3280700002); DIR:OUT; SFP:1102; SCL:1; SRVR:MWHPR05MB2830; H:MWHPR05MB2829.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="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: juniper.net
X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Aug 2016 14:45:45.9766 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR05MB2830
Archived-At: <https://mailarchive.ietf.org/arch/msg/ospf/qJs-RfSfqKuZoNN1WQREZmiTmCE>
Subject: Re: [OSPF] OSPFv2 SR draft
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: Wed, 03 Aug 2016 14:46:02 -0000

Peter, 

Taking a looking at the whole paragraph into this sentence was added, 
I am not sure how to interpret it.  

   The SR-Algorithm Sub-TLV is optional.  It MAY only be advertised once
   in the Router Information Opaque LSA.  If the SID/Label Range TLV, as
   defined in Section 3.2, is advertised, then the SR-Algorithm TLV MUST
   also be advertised.  If the SR-Algorithm TLV is not advertised by the
   node, such node is considered as not being segment routing capable.

Is this sentence intended to imply that if a router does not advertise 
the SR-Algorithm TLV including algorithm X, then any prefix-SIDs for 
algorithm X advertised by that router will be ignored by other routers?  

If this is the intention, then it would be better to state is more explicitly.

If not, then the intended meaning should be clarified.

Thanks,
Chris


-----Original Message-----
From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Peter Psenak
Sent: Friday, July 22, 2016 3:30 AM
To: OSPF List <ospf@ietf.org>
Subject: [OSPF] OSPFv2 SR draft

Hi All,

following text has been added in the latest revision of the OSPFv2 SR 
draft, section 3.1.

"If the SR-Algorithm TLV is not advertised by node, such node is 
considered as not being segment routing capable."

Please let us know if there are any concerns regarding this addition.

thanks,
Peter

_______________________________________________
OSPF mailing list
OSPF@ietf.org
https://www.ietf.org/mailman/listinfo/ospf