Re: [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

"Ketan Talaulikar (ketant)" <ketant@cisco.com> Thu, 22 July 2021 07:48 UTC

Return-Path: <ketant@cisco.com>
X-Original-To: spring@ietfa.amsl.com
Delivered-To: spring@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8430D3A3CBB; Thu, 22 Jul 2021 00:48:54 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -11.895
X-Spam-Level:
X-Spam-Status: No, score=-11.895 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, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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=CMw9Xbvq; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=yVXlP4O3
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 fTFTx7JMnCll; Thu, 22 Jul 2021 00:48:48 -0700 (PDT)
Received: from alln-iport-1.cisco.com (alln-iport-1.cisco.com [173.37.142.88]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2933E3A3CB9; Thu, 22 Jul 2021 00:48:48 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=33383; q=dns/txt; s=iport; t=1626940128; x=1628149728; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=B9xwg+dNnibbv88GQria+71t2/cdjyKA/2eT+qFfHvU=; b=CMw9XbvquXkyS63/Jn9jcN3nzdXZPZ/Xx1vUToPx0LfabEtGCcvr7UCP ZqeGGXgpyEv3ZmnPKMABNOxzfPGsHkt52jbHa4vbCnOUPzjiSEA0NUFXy pkGpESMJYa77ohtrbWpmJNm9txlgKUAHpF9hjpx8rQe2aV/vNk+RPklJd o=;
X-IPAS-Result: =?us-ascii?q?A0DLAgAjIvlgl4sNJK1aHgEBCxIMQIFOC4EjMFF+Dkw3M?= =?us-ascii?q?YgQA4U5iGEDilePWYEuFIERA1QLAQEBDQEBQQQBAYRXAoJ2AiU2Bw4CBAEBA?= =?us-ascii?q?QEDAgMBAQEBBQEBBQEBAQIBBgQUAQEBAQEBAQFyhWgNhkUBAQEEEhsTAQE3A?= =?us-ascii?q?Q8CAQgRAwEBASEBBgchERQJCAIEDgUIEweCTwGBflcDLwGdNAGBOgKKH3iBN?= =?us-ascii?q?IEBggcBAQYEBIUiDQuCNAmBOoJ8hAyBGYVLJxyBSUSBFAFDgWGBAT6CIEIEg?= =?us-ascii?q?SkBEgEjHgYQgxeCLoIsEFtqBEtOgSUZBAEuER4CD5E1i3WNNpE5WwqDJZhZh?= =?us-ascii?q?XoSg2OLXpcelHcMkGyVJQIEAgQFAg4BAQaBZwooa3BwFTuCaVAZDo4fDAUIC?= =?us-ascii?q?YNPil5zAjYCBgsBAQMJi14BAQ?=
IronPort-PHdr: A9a23:4wpkVB/sZEflBP9uWMPoyV9kXcBvk7fpOA8N54Bhjb9SIeyv/JXna UrY4/glzFrERp7S5P8Mje3K+7vhVmoN7dfk0jgCfZVAWgVDhZAQmAotU8yYD0zjIeSsaSEmT 4xOUVZ/9CS9Nk5YUM/1e1zVpCi06jgfUhXyPAZ4PKL7AInX2s+2zOu1vZbUZlYguQ==
IronPort-HdrOrdr: A9a23:6SoVlqDieEcJHHvlHej1sseALOsnbusQ8zAXPh9KKCC9I/b3qy nxppsmPEfP+UkssHFJo6HmBEDyewKjyXcV2/hQAV7GZmnbUQSTXfpfBOfZsljd8mjFh5JgPM RbAutD4b/LfCJHZK/BiWHSebtNsbr3kpxAx92uskuFJjsaDZ2Imj0JcjpzZXcGPTWua6BJcK a0145inX6NaH4XZsO0Cj0uRO7YveDGk5rgfFovGwMnwBPmt0Lr1JfKVzyjmjsOWTJGxrkvtU LflRbi26mlu/anjjfBym7o6YhMkteJ8KoHOCXMsLlQFtzfsHfvWG1TYczagNnzmpD21L8eqq iKn/7nBbUp15qeRBDunfKn4XiQ7N9n0Q6T9bbfuwq/nSQ8LwhKVPaoQuliA0fkAgMbzaNBOK 4n5RPri7NHSRzHhyjz/N7OSlVjkVe1u2MrlaoJg2VYSpZ2Us4ckWUzxjIeLH47JlO21GnnKp gZMOjMoPJNNV+KZXHQuWdihNSqQ3QoBx+DBkwPoNac3TRalG1wixJw/r1Qol4QsJYmD5VU7e XNNapl0LlIU88NdKp4QOMMW9G+BGDBSQ/FdGiSPVPkHqcaPG+lke+53JwloOWxPJAYxpo7n5 rMFFteqG4pYkrrTdaD2ZVamyq9C1lVnQ6dgv22wqIJ+4EUaICbRRFreWpe2vdI+c9vd/Ezc8 zDT65rPw==
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="5.84,260,1620691200"; d="scan'208,217";a="724683415"
Received: from alln-core-6.cisco.com ([173.36.13.139]) by alln-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 22 Jul 2021 07:48:46 +0000
Received: from mail.cisco.com (xbe-aln-003.cisco.com [173.36.7.18]) by alln-core-6.cisco.com (8.15.2/8.15.2) with ESMTPS id 16M7mkX5000621 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=OK); Thu, 22 Jul 2021 07:48:46 GMT
Received: from xfe-rcd-004.cisco.com (173.37.227.252) by xbe-aln-003.cisco.com (173.36.7.18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Thu, 22 Jul 2021 02:48:46 -0500
Received: from xfe-rcd-001.cisco.com (173.37.227.249) by xfe-rcd-004.cisco.com (173.37.227.252) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Thu, 22 Jul 2021 02:48:45 -0500
Received: from NAM10-BN7-obe.outbound.protection.outlook.com (72.163.14.9) by xfe-rcd-001.cisco.com (173.37.227.249) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15 via Frontend Transport; Thu, 22 Jul 2021 02:48:45 -0500
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Oy8yNWRjw+V17sgLAMLl4+Bb9vEj89TNUhH3ksYF0EecYREv3AG5xDHqDcSsa7pYDeKydQMKGg+SsY/OLQQDWZ0pSlYuR8W9pX9he0OLof6HiJkTzOJPLNVOlxYghG9Z5eAWGQ13Pl0UD6+bCGcqTgBsdMtkONyKnM4e2npn/mu+qFNO4zrTHcXSnMkgOmN8KewhqZv66OFDw8R/7kL4hsIpgRxBIlMv8Muj+vIHdzgC7xb8S22bemNH2CAiLhr0qNXrSscwprUhhW6IOodKsf1DH++ZgPNmknu1FD+Fx792p9eRU1U9vnfrY6gSLe+OivX5lPzsGD+g0U6ZfH+6bQ==
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=uRkQh55hjnG4VR1YxttS9dJyJ/czRCwJFSOmjWVCd48=; b=WF8Y6TE5LMeIybRvaFR5yEM9TEQvdt+A8rMUbI4TsSUOSE7vTHuGgqNKG9qzbgcbCQCTl2G2r0H4PdtZFPgYMlhZNKgoJF0zBW8TubIDyZzvs87D3+jsIn9/a47eqPr18fuktrY/8sqeaDxuGVGhg3iYBqjJX6IWCDu1yFchKQGkoUMmLsF0jbbqJwLYiz4FK+/bIukKGwTk/mypIUP2CVa72NkMmaZO43vTt+AZ4sEXnYrKENXWF/q36LnxdIVkmQGbXWBiBl2dQpkxy2YsKKYui5iwJq0t7mY960l5cYi1NdYIcj0JnK3NQFGjwbVYDEjtkcFQmuefk+xajkRyiQ==
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=uRkQh55hjnG4VR1YxttS9dJyJ/czRCwJFSOmjWVCd48=; b=yVXlP4O3oywAskuOCVlUYEMVe9aLZtzM7yHnbI06cZbRlQ+aZA+XdhmJ9vRoQVlZc8TjV7Yjd2zo/dQ+CkvS+pC/p+whMHHBmu7kQqwMJHy0lZ4CY9mBFQ4KB2vQYNuaScR8MnGx8EUuLsU3sBe4Nv4rg3ZpAZWQk/sRamot40s=
Received: from MW3PR11MB4570.namprd11.prod.outlook.com (2603:10b6:303:5f::22) by CO1PR11MB5140.namprd11.prod.outlook.com (2603:10b6:303:95::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.24; Thu, 22 Jul 2021 07:48:43 +0000
Received: from MW3PR11MB4570.namprd11.prod.outlook.com ([fe80::7c01:5b00:b7b8:3e87]) by MW3PR11MB4570.namprd11.prod.outlook.com ([fe80::7c01:5b00:b7b8:3e87%3]) with mapi id 15.20.4331.034; Thu, 22 Jul 2021 07:48:43 +0000
From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Rajesh M <mrajesh@juniper.net>
CC: "spring@ietf.org" <spring@ietf.org>, "bess@ietf.org" <bess@ietf.org>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>
Thread-Topic: SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)
Thread-Index: Add5ZuxHtH2qrBhRQGK4/wpw+iW7/ADOgmjgAAC4i7gAAG45wACHp2JQAAGkXhAAAMVmUA==
Date: Thu, 22 Jul 2021 07:48:43 +0000
Message-ID: <MW3PR11MB457063161EC80435C407CF92C1E49@MW3PR11MB4570.namprd11.prod.outlook.com>
References: <BN6PR05MB36346DDD4F6824CD65D70491BE129@BN6PR05MB3634.namprd05.prod.outlook.com>, <BN6PR05MB36341943DEC7D8DC5869A9E0BEE19@BN6PR05MB3634.namprd05.prod.outlook.com> <BY3PR08MB70603EB604AF65D3580E3794F7E19@BY3PR08MB7060.namprd08.prod.outlook.com> <BN6PR05MB363439BAFB0BD66C0DC53354BEE19@BN6PR05MB3634.namprd05.prod.outlook.com> <BN6PR05MB3634E1880604AC6AC11ECAD8BEE49@BN6PR05MB3634.namprd05.prod.outlook.com> <MW3PR11MB4570AFB28290F5AA0C871141C1E49@MW3PR11MB4570.namprd11.prod.outlook.com>
In-Reply-To: <MW3PR11MB4570AFB28290F5AA0C871141C1E49@MW3PR11MB4570.namprd11.prod.outlook.com>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
msip_labels: MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Enabled=True; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SiteId=bea78b3c-4cdb-4130-854a-1d193232e5f4; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SetDate=2021-07-15T11:06:24.0000000Z; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Name=0633b888-ae0d-4341-a75f-06e04137d755; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_ContentBits=2; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Method=Standard
authentication-results: juniper.net; dkim=none (message not signed) header.d=none;juniper.net; dmarc=none action=none header.from=cisco.com;
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 1b231505-2afe-41e7-cab3-08d94ce52147
x-ms-traffictypediagnostic: CO1PR11MB5140:
x-microsoft-antispam-prvs: <CO1PR11MB514034102952D2C151AB863EC1E49@CO1PR11MB5140.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:10000;
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
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:(39860400002)(366004)(396003)(376002)(136003)(346002)(66946007)(186003)(316002)(122000001)(8936002)(8676002)(5660300002)(2940100002)(6506007)(53546011)(66556008)(478600001)(76116006)(4326008)(66476007)(9686003)(7696005)(55016002)(54906003)(64756008)(52536014)(6916009)(26005)(66446008)(71200400001)(38100700002)(86362001)(33656002)(2906002)(83380400001)(38070700004); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?4T0mgtxl/uals5/yMxuQQ6U0zNjwZ5EEnWwppul7cbsmPEjiSXJRNSA+JrPY?= =?us-ascii?Q?xY1EX3m9LZ5n5eTqDpy18hUXv7yQWCsQP7Fmvjz+1PAHABKXKrNNMPg7bzNf?= =?us-ascii?Q?o6KMJ6/Tsgtrb9wYCHhMJPdmx0mmBHeC6nbs6FRyEnrTy/viN8GQExH3Xdxx?= =?us-ascii?Q?9iqdO5hGFu7BoduX6/0Ivm+O5acQRYriJC+3gwNd3pWYoT5b4kFSLSMTuug2?= =?us-ascii?Q?d5+vZjc8P54MGu4ZhF5C4i3e2tATohYOj1IxVWpoIPlxuDq0XsPQoec3hLUQ?= =?us-ascii?Q?yi3GtO5ZZ67io+Um0YS5Fq9DzV6T46PfmI5x3ob8YYBmN2pljVYOT/CHtv2s?= =?us-ascii?Q?KZdJjxk6+inBrQcGTcbCTvPFrFiuMeChzoAsl68J/ObdIsBRn4hI7mqTcyxi?= =?us-ascii?Q?nItnpiMdtbcSgxzYpvkFtZzW6z5xxkbbYwcQ4L/cBEzMXDEDoot8c54XIqUH?= =?us-ascii?Q?wuMLDOqg7KBisWzOe5H9s6IQeZ3rUvZbYacClchuVW8PsiNBD331oTvolHQ9?= =?us-ascii?Q?QwuZxbWYXcMtcMToglU4Fv8xGzES+W4mZZJj9ghHWci/om5yp/qQlklWPeJQ?= =?us-ascii?Q?OjdE50+POW/kdIsFZsIPbS+s1k2wcDLEv7zSMMUV4IQJSzIxR69S+IGwLpMy?= =?us-ascii?Q?Kh2bqzJvUn3htc/+Zbsav0Twz9JWnLvDViXdJWCxmrYlSUgp9QNjZdNkKEpr?= =?us-ascii?Q?gP5dAw2bUUriPRJy9xWTAwOiOLJbUTopY0xWY0UJlQ/H5gF0WZNTRHKBylIr?= =?us-ascii?Q?wMk4MU4fSZtDgrCq/nfF5sV5GfeLnvzrcTBBTI0E01coSO+3KX6/stHa2tAh?= =?us-ascii?Q?x2KIW/LBNVAGK1dV9Rv04qEJqjhh8H2k49lUfVaFpL7YFOmnHmuS5bUEHyzy?= =?us-ascii?Q?ye4Go00sBFPKPmrbtX0OouW568d8PganH3cddazxwTO369sUa1e5GjXH6/Bc?= =?us-ascii?Q?t6y077sd8z/jc4CeO7dBEQiaD+eNFr2FoFhWLiFBMip4ECgzsmqMPyWiN5+2?= =?us-ascii?Q?74TPj6kc5bFVV2zqJ7QVEujHcfaUPUo1G2Xwlm+F9hqvqeHSVnGPK8CGgS9S?= =?us-ascii?Q?IGTFwNt4niGJb1tXOEc5/e3xQcE2YhIQ9ocPxyaXx+RIc8NTKCdgpjlLBW3R?= =?us-ascii?Q?3FI7jgQiGBDkjgTyCKyUqhPZVRBvNMJn8zkhDRaJq8xNW/LeJep1aD4LPnIc?= =?us-ascii?Q?Ax9YE4QfaogY7EkS2b15z+xhVnVquE4dVcBOqUps20o9rHtYBk9I2nZr4id7?= =?us-ascii?Q?PrAXkUP2f0PR8JpudxtlcKiv5JOIvH8sayD7D3lMKWJHqiHMEjdsl4eN7x3j?= =?us-ascii?Q?nQ64c42eZ8/5JNx1PzBtUUAf?=
x-ms-exchange-transport-forked: True
Content-Type: multipart/alternative; boundary="_000_MW3PR11MB457063161EC80435C407CF92C1E49MW3PR11MB4570namp_"
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: 1b231505-2afe-41e7-cab3-08d94ce52147
X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Jul 2021 07:48:43.8364 (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: gbDlYBEdQlaHRXAVaadqNbvD/LoGhjRam8M4/FGfyAu+Q6btjJxFXUpf/s4r7mf5yPP3s5djLMv4L/HGKG2NRA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB5140
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.36.7.18, xbe-aln-003.cisco.com
X-Outbound-Node: alln-core-6.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/pydR6f6BuQb8AA2JOzr2mshi3Dk>
Subject: Re: [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)
X-BeenThere: spring@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" <spring.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/spring>, <mailto:spring-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/spring/>
List-Post: <mailto:spring@ietf.org>
List-Help: <mailto:spring-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/spring>, <mailto:spring-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Jul 2021 07:48:55 -0000

Resending with individual email addressed trimmed

From: Ketan Talaulikar (ketant)
Sent: 22 July 2021 13:13
To: Rajesh M <mrajesh@juniper.net>et>; Rajesh M <mrajesh=40juniper.net@dmarc.ietf.org>rg>; Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>om>; gdawra.ietf@gmail.com; Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com>om>; robert@raszuk.net; bruno.decraene@orange.com
Cc: spring@ietf.org; bgp@ans.net; Shraddha Hegde <shraddha@juniper.net>et>; bess@ietf.org; Srihari Sangli <ssangli@juniper.net>
Subject: RE: SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

Hi Rajesh,

My apologies for the delay in my response. However, some of my co-authors and other WG members have already clarified this point. Let me try to summarize.

The draft covers two SRv6 based mechanisms for the transport of services between SRv6 PEs. (1) using SR Policy based steering (i.e. for service routes with Color Extended Communities) using the H.encap construct along with a list of SRv6 segments  and the other (2) using H.encap with just the SRv6 Service SID in the IPv6 DA.

As mentioned in the draft, it is required to verify the reachability of the SRv6 Service SID before the mechanism (2) can be used. This is an explicit clarification for verification of reachability. In an MPLS-VPN scenario, if the egress PE NH's IP route is reachable at the ingress PE but without an MPLS label, such a path cannot be used. This is semantically similar.

The mechanism (1) is different since the routing to the egress PE is via SR Policy and hence the requirement for verification of reachability of the SRv6 Service SID is not there.

There is no mandate for the setting of the NH since that is left to deployment design.

I hope this helps in addition to the various clarifications already provided by others.

Thanks,
Ketan

From: Rajesh M <mrajesh@juniper.net<mailto:mrajesh@juniper.net>>
Sent: 22 July 2021 12:09
To: Rajesh M <mrajesh=40juniper.net@dmarc.ietf.org<mailto:mrajesh=40juniper.net@dmarc.ietf.org>>; Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>>; Ketan Talaulikar (ketant) <ketant@cisco.com<mailto:ketant@cisco.com>>; gdawra.ietf@gmail.com<mailto:gdawra.ietf@gmail.com>; Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com<mailto:cfilsfil@cisco.com>>; robert@raszuk.net<mailto:robert@raszuk.net>; bruno.decraene@orange.com<mailto:bruno.decraene@orange.com>
Cc: spring@ietf.org<mailto:spring@ietf.org>; bgp@ans.net<mailto:bgp@ans.net>; Shraddha Hegde <shraddha@juniper.net<mailto:shraddha@juniper.net>>; bess@ietf.org<mailto:bess@ietf.org>; Srihari Sangli <ssangli@juniper.net<mailto:ssangli@juniper.net>>
Subject: RE: SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

Could Authors respond to this ?



Juniper Business Use Only
From: Rajesh M <mrajesh=40juniper.net@dmarc.ietf.org<mailto:mrajesh=40juniper.net@dmarc.ietf.org>>
Sent: Monday, July 19, 2021 7:28 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>>; Rajesh M <mrajesh@juniper.net<mailto:mrajesh@juniper.net>>; Ketan Talaulikar (ketant) <ketant@cisco.com<mailto:ketant@cisco.com>>; gdawra.ietf@gmail.com<mailto:gdawra.ietf@gmail.com>; Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com<mailto:cfilsfil@cisco.com>>; robert@raszuk.net<mailto:robert@raszuk.net>; bruno.decraene@orange.com<mailto:bruno.decraene@orange.com>
Cc: spring@ietf.org<mailto:spring@ietf.org>; bgp@ans.net<mailto:bgp@ans.net>; Shraddha Hegde <shraddha@juniper.net<mailto:shraddha@juniper.net>>; bess@ietf.org<mailto:bess@ietf.org>; Srihari Sangli <ssangli@juniper.net<mailto:ssangli@juniper.net>>
Subject: RE: SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

[External Email. Be cautious of content]

Hi All,

For best effort service, flex algo - Resolve SRv6 Service SID for forwarding.
For SR-TE, CAR/CT - Resolve BGP next hop for forwarding.

There is no unification here, it's better to unify.
Any other solution is OK.

Thanks
Rajesh



Juniper Business Use Only
From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>>
Sent: Monday, July 19, 2021 7:17 PM
To: Rajesh M <mrajesh@juniper.net<mailto:mrajesh@juniper.net>>; Rajesh M <mrajesh=40juniper.net@dmarc.ietf.org<mailto:mrajesh=40juniper.net@dmarc.ietf.org>>; Ketan Talaulikar (ketant) <ketant@cisco.com<mailto:ketant@cisco.com>>; gdawra.ietf@gmail.com<mailto:gdawra.ietf@gmail.com>; Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com<mailto:cfilsfil@cisco.com>>; robert@raszuk.net<mailto:robert@raszuk.net>; bruno.decraene@orange.com<mailto:bruno.decraene@orange.com>
Cc: spring@ietf.org<mailto:spring@ietf.org>; bgp@ans.net<mailto:bgp@ans.net>; Shraddha Hegde <shraddha@juniper.net<mailto:shraddha@juniper.net>>; bess@ietf.org<mailto:bess@ietf.org>; Srihari Sangli <ssangli@juniper.net<mailto:ssangli@juniper.net>>
Subject: Re: SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

[External Email. Be cautious of content]

Hi Rajesh,

The draft is written so that the next-hop address MAY be covered by the locator, but there are cases in which the next-hop address is not part of the locator prefix, and there are implementations already allowing that, so I don't agree the document should mandate what you are suggesting.

Thanks.
Jorge

From: Rajesh M <mrajesh@juniper.net<mailto:mrajesh@juniper.net>>
Date: Monday, July 19, 2021 at 3:24 PM
To: Rajesh M <mrajesh=40juniper.net@dmarc.ietf.org<mailto:mrajesh=40juniper.net@dmarc.ietf.org>>, Ketan Talaulikar (ketant) <ketant@cisco.com<mailto:ketant@cisco.com>>, gdawra.ietf@gmail.com<mailto:gdawra.ietf@gmail.com> <gdawra.ietf@gmail.com<mailto:gdawra.ietf@gmail.com>>, Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com<mailto:cfilsfil@cisco.com>>, robert@raszuk.net<mailto:robert@raszuk.net> <robert@raszuk.net<mailto:robert@raszuk.net>>, bruno.decraene@orange.com<mailto:bruno.decraene@orange.com> <bruno.decraene@orange.com<mailto:bruno.decraene@orange.com>>, Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>>
Cc: spring@ietf.org<mailto:spring@ietf.org> <spring@ietf.org<mailto:spring@ietf.org>>, bgp@ans.net<mailto:bgp@ans.net> <bgp@ans.net<mailto:bgp@ans.net>>, Shraddha Hegde <shraddha@juniper.net<mailto:shraddha@juniper.net>>, bess@ietf.org<mailto:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Srihari Sangli <ssangli@juniper.net<mailto:ssangli@juniper.net>>
Subject: RE: SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)
Hi Authors,

Please respond.

Thanks
Rajesh



Juniper Business Use Only
From: spring <spring-bounces@ietf.org<mailto:spring-bounces@ietf.org>> On Behalf Of Rajesh M
Sent: Thursday, July 15, 2021 4:36 PM
To: Ketan Talaulikar (ketant) <ketant@cisco.com<mailto:ketant@cisco.com>>; gdawra.ietf@gmail.com<mailto:gdawra.ietf@gmail.com>; Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com<mailto:cfilsfil@cisco.com>>; robert@raszuk.net<mailto:robert@raszuk.net>; bruno.decraene@orange.com<mailto:bruno.decraene@orange.com>; jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>
Cc: spring@ietf.org<mailto:spring@ietf.org>; bgp@ans.net<mailto:bgp@ans.net>; Shraddha Hegde <shraddha@juniper.net<mailto:shraddha@juniper.net>>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

[External Email. Be cautious of content]

Hi All,

As per this draft, this is how resolution must work.

1)For Non Intent service Route:
if BGP next hop is not reachable return.
Resolve SRv6 Service SID for forwarding.

2)For Intent service Route (IGP Flex-Algo first then BGP CAR then SR Policy):
BGP next hop is not reachable return.
Resolve SRv6 Service SID for forwarding(To find IGP flex algo).if successfully resolves then return.
Resolve BGP next hop for forwarding (in case above is not success).


Using Service SID (overlay),for resolution is definitely not recommended.

Instead in case of srv6, we always resolve on BGP nexthop. This will be in line with BGP legacy.
In case of best effort/flex algo we must mandate user to set corresponding locator as BGP nexthop for srv6 routes.
I think this is a reasonable mandate.

Thanks
Rajesh


Juniper Business Use Only