Re: [Lsr] John Scudder's No Objection on draft-ietf-lsr-ospf-prefix-originator-11: (with COMMENT)

"Ketan Talaulikar (ketant)" <ketant@cisco.com> Fri, 09 April 2021 15:58 UTC

Return-Path: <ketant@cisco.com>
X-Original-To: lsr@ietfa.amsl.com
Delivered-To: lsr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 861453A25C1; Fri, 9 Apr 2021 08:58:27 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.617
X-Spam-Level:
X-Spam-Status: No, score=-9.617 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_BLOCKED=0.001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_NONE=0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=D76R3Lhm; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=vmP2kdux
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 ZSYcG2wvIjTL; Fri, 9 Apr 2021 08:58:19 -0700 (PDT)
Received: from alln-iport-3.cisco.com (alln-iport-3.cisco.com [173.37.142.90]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6197E3A25C3; Fri, 9 Apr 2021 08:58:19 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10666; q=dns/txt; s=iport; t=1617983899; x=1619193499; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=7UYm+hzazrAfJ6u/8k3bdJypoxhQFF8mVUHoBCUo2Rw=; b=D76R3LhmvYs/qQH3ALrkcyAihtNADbPdfELMcos/j3ncXW/KeNkQrZ20 dZQes5fZk8enZrOPsGHA2sO9CackADMlR9+/+KtJWxPIW54yEL+9sMtaI BXtdJmNVSwwh42EUgvbmAvPYHTB040FbEO9H2ND2OOHKNLkh8RWzM2b17 k=;
X-IPAS-Result: =?us-ascii?q?A0DBBQBzeHBg/4QNJK1aDg4BAQEBAQEHAQESAQEEBAEBQ?= =?us-ascii?q?IFSgVMjLgd3WjYxCoQ4g0gDhTmIVAOKLo8NgUKBEQNUCwEBAQ0BAR0NCAIEA?= =?us-ascii?q?QGEUAIXgWACJTgTAgMBAQEDAgMBAQEBAQUBAQECAQYEcROFUA2GRAEBAQEDA?= =?us-ascii?q?QEhEQwBASwLAQsEAgEIEQQBAQMCERUCAgIfBgsVCAgCBAENBQiCaoJVAy8BD?= =?us-ascii?q?qA2Aoofd4EygQGCBAEBBoE3Ag5BgyINC4ITAwaBDyqCdoJxUEiCWoN0JxyBS?= =?us-ascii?q?UKBE0OBX4EAPoIeQgEBAQEBgRYSARIBIz2CWDWCK4FPCQFrBgJiBBQOGRYCB?= =?us-ascii?q?BNEIBYHLBUECwEYAgUMMZB/BIJyAUKlZ1sKgwuJY4cdhkSFW4NNiniTUIJcl?= =?us-ascii?q?RWCEIlagxaPQAiEYQICAgIEBQIOAQEGgWsjaVgRB3AVO4JpUBcCDod/hiAMF?= =?us-ascii?q?hWDOYUUhQRBcwI2AgYBCQEBAwl8iVItgQcBMV0BAQ?=
IronPort-PHdr: A9a23:c99shRWTb7pVXjGtPEdt0iw1QK3V8K0CAWYlgqEPgq9Scqml45XpN VDe4vMollLSQIHH8Jpsl/HXta/gRGVG5oyO9nsEI9RAVB4A3MMRmQFoQMuIElbyI/OiaSsmV N9DW1lo8zDeUwBVFc/yakeUrii06jgfSQnkNAx6Jvn8XInIgIK80bP695jaeQ4dgj27bPt7J wm3qgOEsM4QjMNiJ689xwGPrGFPfrFdxHhjIhSYmBOvjvo=
IronPort-HdrOrdr: A9a23:yc4REK/6yTmNWFbB9apuk+Gpcb1zdoIgy1knxilNYDRvWIixi9 2ukPMH1RX9lTYWXzUalcqdPbSbKEm8ybdc2qNUGbu5RgHptC+TLI9k5Zb/2DGIIUPD38Zn/+ Nbf6B6YeeeMXFTh8z3+RT9Nt4mzsWO/qzAv5ag815GZ2hRGsZdxi1+DRuWFVAzYQFAC4YwGp b03Ls4mxOLf3MLYsOnQkQfV+/YqNHR0L7gaxgKBxkogTP+zA+Awrj8DhSew1MiQypCqI1Sv1 Ttvi7YwuGYs/+9wgLBzGO71fRrsfbo19crPr32tuE7MTPp4zzYAbhJe7rHhzwtpfHq1VBCqq ixnz4FH+Ber0zcZXu0pxyF4Xih7B8L52X5wVGVxVvPyPaJPg4SMMZKiYJHfhax0SNJ17sQvN MprgCknqFaAh/akCP268KgbWAWqmOPvXEgneQP5kYvN7c2Vb5LoYQTuGNTHZsQdRiKkLwPLe h0AMnQoMtRaFORBkqpx1VH/drEZAVWIj62Bmw5/uCF2Tlfm350i2ECwtYEo3sG/JUhD7FZ+u XtKM1T5fJzZ/5TSZg4KPYKQMOxBGCIawnLKniuLVPuE7xCE27RqqTw/K4+6IiRCd415ap3vK 6EfEJTtGY0dU6rI9aJxod3/hfER3j4ejjx1MdE5dxctqfnTLTmdQ2PIWpe1veIkrE6OIn2Sv yzMJVZD7vINm31A7tE2AX4Rt1cMn8bXMoJussqWl6Hr87RQ7ea8dDzQbL2Hv7AADwkUmTwDj 8oRz7oPvhN6UitRzv5jXHqKjXQU3262ag1PLnR/uAVxoRIHJZLqBIphVOw4dzOLTVDt6cxbV ZvOb+PqNLjmUCGuULzq0l5MBtUCUhYpJ/6VWlRmAMMO0ToNbAZu9uefmhW1GCdJgB2St7XFA I3nSUyxYuHa7irgQwyAdOuNWyXy1EJomiRcpsakqqfodv+doggFZYgUqxpHQDNHxh48Dwa8F trWUshfAvyBznugaKqgNgoH+nZbcB7mxruC9VTs2jjuUKVotwPSnMXUyW1a9OehR8jSlNv9w ZM2p5apIDFuD60bUMjnewzMTR3GRWqKYMDKD7AWaJ5tfTAfhpqQWKDmDqA4itDClbCxgE1nW zuLSqdZPfRJEFS00ooiJrCwRdTaniXeV52ZzRct4BwfF625kpb4Kusere51XeXZx855twldB vBYTcUP2pVto2K/RaIhTePEmgnzJ0yPurbSK8uaa3Xx2nFEvz6qYgWW/BT55prL9bor6sCVv +eYRacKHfiB/ouwBH9nAdpBABk7H0lm+jvwhvr8Syx22M+G+PbJD1dNvomCsDZ62jvXPCT1p plydozoOurK230LtqL07veYTIGKhTdpweNPqsVgIERuaI5r71oGZbHFTPOyXFcxR07aN7ui1 l2etUM3JnRfot0O8ACcSNQ+VQk0NyJMUswqwTzRuszZ0skgXPXN86AioC45YYHEwmEvk/9KF Of+ypS87PeUyyP2aUTBqgwLW5VAXJMoEhK7aeHbcndGQ+qf+ZM8B6mKXe7aqZaU7XAFrMKrB p2iuv40NO/Zm79wkTXsjR6KK4VrDriTsO2HQ6WGelHt9a9Ik+Bh6O24Mi1yDf7IAHLH3gwlM lAbwgXaM8GlzwpyIsw2SK2Qrbsok0kn0BFiAsX32LFy8yj+iPDAUpCMQfFmZ1YUjlYL2iQga 3+gJ2l/WW45CIAxILKG0hRdMxfAtQcToD4KCF1NMgb1YTYiJYHk2BEexchD2k1lTD70adnxN 6CqYfvZ9E=
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="5.82,209,1613433600"; d="scan'208";a="678167175"
Received: from alln-core-10.cisco.com ([173.36.13.132]) by alln-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 09 Apr 2021 15:58:18 +0000
Received: from mail.cisco.com (xbe-rcd-007.cisco.com [173.37.102.22]) by alln-core-10.cisco.com (8.15.2/8.15.2) with ESMTPS id 139FwIXE010582 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=OK); Fri, 9 Apr 2021 15:58:18 GMT
Received: from xfe-rcd-002.cisco.com (173.37.227.250) by xbe-rcd-007.cisco.com (173.37.102.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Fri, 9 Apr 2021 10:58:17 -0500
Received: from xhs-rtp-003.cisco.com (64.101.210.230) by xfe-rcd-002.cisco.com (173.37.227.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Fri, 9 Apr 2021 10:58:17 -0500
Received: from NAM12-BN8-obe.outbound.protection.outlook.com (64.101.32.56) by xhs-rtp-003.cisco.com (64.101.210.230) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Fri, 9 Apr 2021 11:58:17 -0400
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=UTTiZbUEWM6F67G7GqQXhf7kvVvIiIVjNL9aFMP+JUT2S/7RV3NuusUnIt003s3accRRrcv8dw7JEaDnnBouijo4WeNLF/rHW3Pu8qRk1zR7zjOwhg+yWXAkKvhAXhd6BFdcznpKJx0ew+7FVbGlTkVFoa2sgKsX3/J4+6z3Wdm/UTcqCvtCVQfgwjNAPc3f3gw1Ub7huE1JB9nfaB6ALOtwDXYwoXOOeg8Dy/Dtx5d5CGee8bu08Khoo8+2wnNxstJoHOjf9d2U9oQOiAquci6K0FBX2+xxA9m8jns0rOItjssSeoj4qUxCfJ8bvZVPntZLcqGwWaF1djXPRz5aGg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=7UYm+hzazrAfJ6u/8k3bdJypoxhQFF8mVUHoBCUo2Rw=; b=dRzwvqUUBHxlh+WE6S27mRupVFHa6KY1Pnpkb8pTlie9Gpc+POD3LgNMk15QyRCOFtW5Rbr3o4zFObmLO+fqVjwHCezn3A3KW1Z6hlu9b4qdcAkUzeev+iEzHViPUpGoraSauaFoC7DXoR/0S296TrltTisifEMbtuume2axj58aWxxmMUrVwUeEsgGdlSoVYh9kd27ZFtzxotaebUrodP21EgPcHcA7iJnS+rd5qAZO7pfZ+H4koLb1UWdeiTtI5dvqjzfq6Fenj0URZmil84GRwrcr5S8pORSgawi2lFZHTGu4MKBRgcla36V62YJ85tdZdtSv/uO7yeMbHPII2w==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cisco.com; dmarc=pass action=none header.from=cisco.com; dkim=pass header.d=cisco.com; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cisco.onmicrosoft.com; s=selector2-cisco-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=7UYm+hzazrAfJ6u/8k3bdJypoxhQFF8mVUHoBCUo2Rw=; b=vmP2kduxs4EKfNWI+FiotLdpOJ4TBSlxBWbU9/kJTug4M0+smypwXPpPUzqfSl6CJeMs90g8clFB0uWtiX8hj7LQCweF8+PWp3P8vPvqco2M02PIkGEzz/scQc843CUreomyb9NBtj0RGZeEbmZBPOyoaIaM0GVpu0rhkXnfv1c=
Received: from MW3PR11MB4570.namprd11.prod.outlook.com (2603:10b6:303:5f::22) by CO1PR11MB4851.namprd11.prod.outlook.com (2603:10b6:303:9b::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4020.18; Fri, 9 Apr 2021 15:58:16 +0000
Received: from MW3PR11MB4570.namprd11.prod.outlook.com ([fe80::592f:2e19:cf5b:a0f5]) by MW3PR11MB4570.namprd11.prod.outlook.com ([fe80::592f:2e19:cf5b:a0f5%5]) with mapi id 15.20.4020.021; Fri, 9 Apr 2021 15:58:16 +0000
From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Aijun Wang <wangaijun@tsinghua.org.cn>, "'John Scudder'" <jgs@juniper.net>, "'The IESG'" <iesg@ietf.org>, Benjamin Kaduk <kaduk@mit.edu>
CC: "lsr-chairs@ietf.org" <lsr-chairs@ietf.org>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "draft-ietf-lsr-ospf-prefix-originator@ietf.org" <draft-ietf-lsr-ospf-prefix-originator@ietf.org>, "chopps@chopps.org" <chopps@chopps.org>, "lsr@ietf.org" <lsr@ietf.org>
Thread-Topic: [Lsr] John Scudder's No Objection on draft-ietf-lsr-ospf-prefix-originator-11: (with COMMENT)
Thread-Index: AQHXLA9vjKnhsEhiBkivkqvVnRDbz6qp4JoAgAAuHICAAkruEA==
Date: Fri, 9 Apr 2021 15:58:16 +0000
Message-ID: <MW3PR11MB4570403CB23F83C34AD83B4EC1739@MW3PR11MB4570.namprd11.prod.outlook.com>
References: <161784226689.28759.382383165155937728@ietfa.amsl.com> <008601d72c1c$5d4f8d40$17eea7c0$@tsinghua.org.cn> <MW3PR11MB45705B07AB4D4FCD05035E71C1749@MW3PR11MB4570.namprd11.prod.outlook.com>
In-Reply-To: <MW3PR11MB45705B07AB4D4FCD05035E71C1749@MW3PR11MB4570.namprd11.prod.outlook.com>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: tsinghua.org.cn; dkim=none (message not signed) header.d=none;tsinghua.org.cn; dmarc=none action=none header.from=cisco.com;
x-originating-ip: [72.163.220.12]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 1c442da1-2d8c-4420-8461-08d8fb7049bc
x-ms-traffictypediagnostic: CO1PR11MB4851:
x-microsoft-antispam-prvs: <CO1PR11MB485106C667BD590530542907C1739@CO1PR11MB4851.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:10000;
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:MW3PR11MB4570.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(136003)(396003)(376002)(39860400002)(366004)(346002)(8936002)(8676002)(55016002)(71200400001)(7696005)(52536014)(6506007)(478600001)(33656002)(53546011)(186003)(966005)(38100700001)(9686003)(54906003)(110136005)(316002)(83380400001)(4326008)(86362001)(26005)(76116006)(2906002)(66946007)(66446008)(66556008)(66476007)(64756008)(5660300002)(66574015); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata: =?utf-8?B?K2NNZWpoYm1GMmx6cmZtdlVhdW1UYWJnWUl1VGxJMHBqbWNWVnFjcWl3ME96?= =?utf-8?B?SDVDU21xZnpwNWZoS2o0ZTlxczVPYWR1SkJRaytOOFAzR1lhM3p0STY1RHlK?= =?utf-8?B?RFBJSWJBUy9aTmZtcWNrbE40SHpFR1p6K0xlc3RQMjRyRXpKTERuVGlVcDNr?= =?utf-8?B?d1lWY0hHeG5SQVhpOGwxY3lrWkozK2k0RUg4RlphRnQwTEZEUjU2cmZHbFVD?= =?utf-8?B?d2ZzTm5jUmtFY3FaNnBCRVh6UHZJTU14bFYrL1BZczhvR2huS1FITUpobTlK?= =?utf-8?B?NEE0VENqRFpNQkFuRm0yTDVDbFg1K0U1ZnNyeGxTNllZOVRpY1JJQWFwaEk1?= =?utf-8?B?Z29CYWdHWTBFMlZzY2tEMUhtR1l3anB1Q2N2dWFnUDMrY3A3S2o4RzczQmwv?= =?utf-8?B?eGhiWW9ScGdUQUMrbzQ4WHc4K0tFNnhBY2x4RjVSS1NCL24xSXBHZnFPN1Z4?= =?utf-8?B?Q3RvOXZSNzJXMlloZ2YycjZDQ0dGMng1b3hOYWQ1Tm54M09qY1ZEZUlYQzE0?= =?utf-8?B?NVNIMm5RWmczbWIxQ3g5QjgxMFlIN2pjeXVySVptaXovUEtXaGJYR1RJUnhL?= =?utf-8?B?Z3RDMmJBYzAzK2FVL2hOSWVLbzlvVGEyZ3U3bHU3ZThuZURWRmd1N2FqZjRw?= =?utf-8?B?KzNVa3FKL25wUjdiM2NFRkUyZW5qOXNZejQyZld2c0Y1VDFUV3pHeUkrMHNE?= =?utf-8?B?anN3UXV3bklMUEFFL2pnVW1ZZjdCeU1qaEx1Ri9SaVpNTWc3Sy8rNVJyVjVE?= =?utf-8?B?TDdxUjBZbzNudnlPbkhqbXNadlBYNFpCN1B2NnoxQ0E2QUVaVWNqMU9BcDFr?= =?utf-8?B?M0dtc2NCUTJuMmsraWFTRU9tazBoRTQ5UFREeG5rT29jVEQyUGR6OGF3UHVQ?= =?utf-8?B?SVAyTEhkSEFUTmtwMmc0VFZRR2Z6dGNwbTdZUGZhcEtLTnVheCszdDN0WXV0?= =?utf-8?B?V0Jzbk9FT1BDQkdGRmg3Zm1HaFlTN1JSTjRmMlY3REFmSmYzVVRuN2wvTmti?= =?utf-8?B?RnNvZmJZVG1uVlpzeWEzREsxR2o5UWxwRWhnT2R5Uk50bUNaeE1URENIMkhB?= =?utf-8?B?ckZGVHQ0SzUrVDQzRGVZYXdrUkp1S0t4enYwM3J4VFJpTDNvbVlETEprY3Nq?= =?utf-8?B?TDFpdngvbEZwcGc4VEFSZitRTStNVjArenkvYm85eGduWDAzc0RhcUdGTTZK?= =?utf-8?B?T1dEVVRqZFpweGdZK3c2SVRkdk5JVWFKMFdvTEFQeWRwdkduSjdBUjJaSXl4?= =?utf-8?B?NUdIQ0pUdHpWSVdRNmp1ZDR2aytWRWw0VnNvZVQwMXVBV2tsdHJ0NzJ4Tmlo?= =?utf-8?B?Rko1UzZpbktXQWlTVDEvNWpDVHdxQ2xjRlZYQW1xRGtpSVVONkJLMGRkNkg4?= =?utf-8?B?Q2hTSXBYYm1lNndKRDROemgrZXdvNGY4RUJWenRHbFlQYUFIK1F1NTBwaFAx?= =?utf-8?B?UjJLVk44d1VZS21RNkVVUGsxckRrRWxBUVo1c21LUXVjU1pucHZBeFpOMk55?= =?utf-8?B?cHlqTWNaOXQrU3JBSitEQ1YvUjFmUnk2M2U1L1AyV2RlYlFGR0VkemZ2TTkv?= =?utf-8?B?VnZrV0ZaYVhST2RKNHBzUlllUWZ5NTVWaXowUlZDbENyRW1zQSsvZzU1Z3pY?= =?utf-8?B?TDNUcEJ2d0xZWFgvZnR2RzVRRTNCdlpIME5CTnk5WE8veTRSWmc2Y3ZqVTUx?= =?utf-8?B?YUo3TkUwek00Snh1WTQrT2poRmt1aHlVcWZiTG5RSXZrL2NsWGdDam1BRC84?= =?utf-8?Q?i2KZHT2mfFFxQ1ByEH4jm79Wlto8/Azi6d73EWG?=
x-ms-exchange-transport-forked: True
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: MW3PR11MB4570.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 1c442da1-2d8c-4420-8461-08d8fb7049bc
X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2021 15:58:16.3322 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: nkBHyAJKWtkaLI7k9RLf3ZyJ/nsUhlEUx0Pt6dqJ1+55MseCqmqRYlU/b2H8l7sK0aU1pXlT5QVYBETT50FNPQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB4851
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.37.102.22, xbe-rcd-007.cisco.com
X-Outbound-Node: alln-core-10.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/EIh0Z2Pf9ryENJUeVUFAvXpzo-w>
Subject: Re: [Lsr] John Scudder's No Objection on draft-ietf-lsr-ospf-prefix-originator-11: (with COMMENT)
X-BeenThere: lsr@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Link State Routing Working Group <lsr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/lsr>, <mailto:lsr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/lsr/>
List-Post: <mailto:lsr@ietf.org>
List-Help: <mailto:lsr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/lsr>, <mailto:lsr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 09 Apr 2021 15:58:28 -0000

Hello All,

We've posted the (final?) update for this draft to cover the minor changes as discussed with John (in the thread below) and with Ben (in a parallel thread).

https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ospf-prefix-originator-12

Thanks once again for the reviews and inputs to improve this document.

Thanks,
Ketan (on behalf of co-authors)

-----Original Message-----
From: Ketan Talaulikar (ketant) 
Sent: 08 April 2021 11:05
To: 'Aijun Wang' <wangaijun@tsinghua.org.cn>cn>; 'John Scudder' <jgs@juniper.net>et>; 'The IESG' <iesg@ietf.org>
Cc: lsr-chairs@ietf.org; aretana.ietf@gmail.com; draft-ietf-lsr-ospf-prefix-originator@ietf.org; chopps@chopps.org; lsr@ietf.org
Subject: RE: [Lsr] John Scudder's No Objection on draft-ietf-lsr-ospf-prefix-originator-11: (with COMMENT)

Hi John,

Using this latest thread to respond since it captures all the open comments.

Please check inline below and we'll update the draft once we reach a conclusion on this.


-----Original Message-----
From: Aijun Wang <wangaijun@tsinghua.org.cn> 
Sent: 08 April 2021 07:41
To: 'John Scudder' <jgs@juniper.net>et>; 'The IESG' <iesg@ietf.org>
Cc: lsr-chairs@ietf.org; aretana.ietf@gmail.com; draft-ietf-lsr-ospf-prefix-originator@ietf.org; chopps@chopps.org; lsr@ietf.org
Subject: RE: [Lsr] John Scudder's No Objection on draft-ietf-lsr-ospf-prefix-originator-11: (with COMMENT)

Hi, John:

-----Original Message-----
From: lsr-bounces@ietf.org <lsr-bounces@ietf.org> On Behalf Of John Scudder via Datatracker
Sent: Thursday, April 8, 2021 8:38 AM
To: The IESG <iesg@ietf.org>
Cc: lsr-chairs@ietf.org; aretana.ietf@gmail.com; draft-ietf-lsr-ospf-prefix-originator@ietf.org; chopps@chopps.org; lsr@ietf.org
Subject: [Lsr] John Scudder's No Objection on draft-ietf-lsr-ospf-prefix-originator-11: (with COMMENT)

John Scudder has entered the following ballot position for
draft-ietf-lsr-ospf-prefix-originator-11: No Objection

When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-lsr-ospf-prefix-originator/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thanks for the update to the document and the discussion. Many points are resolved, remaining discussion summarized below. And by the way, I wondered the same as Ben regarding "In the ECMP case is there a way to correlate (order of
appearance?) the listed router-IDs with the listed reachable addresses?"

1. I've cleared my discuss but as mentioned in earlier email, would still suggest an update to the abstract:

"I would prefer to see a sentence in the abstract as well, since for some people the abstract is the only look they’ll take at the document and for them, the question of “what is it for?” isn’t answered. I don’t insist on this, but I recommend it. The additional sentence, if you choose to add it, could be something like “this information does not change route computation but is expected to be useful for network analysis and troubleshooting”."
[KT] Ack - will update the abstract in the next version and add : " These extensions do not change the core OSPF route computation functionality but provide useful information for network analysis, troubleshooting and use-case like traffic engineering (especially on a controller or an application external to OSPF)."

2. Section 2.1:

   For intra-area prefix advertisements, the Prefix Source OSPF Router-
   ID Sub-TLV MUST be considered invalid and ignored if the OSPF Router
   ID field is not the same as Advertising Router field in the
   containing LSA.  Similar validation cannot be reliably performed for
   inter-area and external prefix advertisements.

As discussed with Ketan, I'm not sure if "ignored" is vague only to me, or if it might be to other readers of the spec. I leave it to the authors' discretion whether and how to elaborate.
[KT] "Ignore" is indeed really the basic option available in OSPF when receiving semantically invalid information within a TLV in an LSA. We cannot discard or change it and neither can we ignore/discard the entire LSA on this account. We normally recommend raising error logs, however in this case since OSPF itself is not processing the information, it seemed better to leave it to the actual user of the information.

4. Section 3:

   When an ABR generates inter-area prefix advertisements into its non-
   backbone areas corresponding to an inter-area prefix advertisement
   from the backbone area, the only way to determine the originating
   node information is based on the Prefix Source OSPF Router-ID and
   Prefix Source Router Address Sub-TLVs present in the inter-area
   prefix advertisement originated into the backbone area by an ABR from
   another non-backbone area.  The ABR performs its prefix calculation
   to determine the set of nodes that contribute to the best prefix
   reachability.  It MUST use the prefix originator information only
   from this set of nodes.  The ABR MUST NOT include the Prefix Source
   OSPF Router-ID or the Prefix Source Router Address Sub-TLVs when it
   is unable to determine the information of the best originating node.

What is it supposed to do if there are N contributing routes but it can only determine the information for M < N of the contributors?

Ketan replied (my paraphrase) that in such a case partial information is sent.
My further question was "OK. And it’s considered fine that that information for some, but not all, of the contributors is included? It seems potentially problematic that the route only includes partial information, but the consumer of the route has no way to know this. The other obvious choices would have been to omit the information altogether if only partial information was available, or to mark it as partial somehow."
[KT] There are two scenarios (that come to mind) where this may happen (a) when the originating node does not support the extensions of draft and (b) when the information is being supressed either at the originating node or an ABR based on some policy (for say abstraction). In case of (a) - the operator has to be aware of this and figure out how to handle the use-case in such deployments. In case of (b), it was the specific operator action that causes this scenario and we assume that they would have figured out how to handle the use-case. So it really depends on the use-case and here there can be multiple use-cases. Based on these two scenarios, one can see why omitting entirely would be a problem. We could have signalled that information is partial, but it is was not considered given the scenarios above and the possibly myriad use-cases. That said, if it is really required then a new TLV can be introduced in the future to indicate this.

[WAJ] My understanding is that such advertisement is dynamic. Once there is new originator for this prefix, the ABR should update the information associated with this prefix. It seems there is no way for the ABR to judge when it have collected all of these information or not? 
[KT] I believe John's comment was different from Ben's query/comment about the "discovery" or "transient" phase for ECMP paths.

Thanks,
Ketan




_______________________________________________
Lsr mailing list
Lsr@ietf.org
https://www.ietf.org/mailman/listinfo/lsr