Return-Path: X-Original-To: idr@mail2.ietf.org Delivered-To: idr@mail2.ietf.org Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id B2FB685859CA for ; Fri, 7 Nov 2025 09:45:21 -0800 (PST) X-Virus-Scanned: amavisd-new at ietf.org X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail2.ietf.org ([166.84.6.31]) by localhost (mail2.ietf.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PVnUaxZvwuKd for ; Fri, 7 Nov 2025 09:45:21 -0800 (PST) Received: from DM1PR04CU001.outbound.protection.outlook.com (mail-centralusazon11020123.outbound.protection.outlook.com [52.101.61.123]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail2.ietf.org (Postfix) with ESMTPS id 05A4685859C3 for ; Fri, 7 Nov 2025 09:45:20 -0800 (PST) Received: from BYAPR07CA0049.namprd07.prod.outlook.com (2603:10b6:a03:60::26) by BN5PR08MB10586.namprd08.prod.outlook.com (2603:10b6:408:2aa::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9320.10; Fri, 7 Nov 2025 17:45:10 +0000 Received: from BY1PEPF0001AE1D.namprd04.prod.outlook.com (2603:10b6:a03:60:cafe::e2) by BYAPR07CA0049.outlook.office365.com (2603:10b6:a03:60::26) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9298.12 via Frontend Transport; Fri, 7 Nov 2025 17:45:09 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 40.93.13.73) smtp.mailfrom=ndzh.com; dkim=none (message not signed) header.d=none;dmarc=bestguesspass action=none header.from=ndzh.com; Received-SPF: Pass (protection.outlook.com: domain of ndzh.com designates 40.93.13.73 as permitted sender) receiver=protection.outlook.com; client-ip=40.93.13.73; helo=DS2PR08CU001.outbound.protection.outlook.com; pr=C Received: from us-east-2b.obx-outbound.inkyphishfence.com (13.59.96.180) by BY1PEPF0001AE1D.mail.protection.outlook.com (10.167.242.106) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9298.6 via Frontend Transport; Fri, 7 Nov 2025 17:45:09 +0000 Received: from DS2PR08CU001.outbound.protection.outlook.com (mail-ds2pr08cu00101.outbound.protection.outlook.com [40.93.13.73]) by obx-inbound.inkyphishfence.com (Postfix) with ESMTPS id 7690998BEE for ; Fri, 7 Nov 2025 17:45:08 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=b/DDX/wLRTXZPvG8UgflxOPFlEl6QBIaBTUNrl8ErKC+xDBQom8de3n6qnU5NQ/YU/DZdU5upT1hzpoRAZiZKzfm6wLnVF9FKIox+Oprf0ngGEcJ7nEsa6QD6Zi6UnndaPmGPgIbz+FW4ybASF2rHdi5GSlZFX4ki1HnSQ3J+bmVuConI5wkVtNjit6XUf2asQJUMPD9EBp4Ct0eSzIgDZVFmSL2tp3OK7LgdoAd/stB9GscUr86mztlx/WYEioaGZk6hS5HGapD9Hzjk5dMkt5RGgI7LomkzUAmxZWEaVaEOj28E3yoiXGwGvdQKf16iMo9mOvvoolmlarFyrdQkQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=wvXqcMRSWV9t7VcufTOylEn7do3E9tUywd5u1JGc9MU=; b=fmHgHaqRMJsVwykHaMgXIJqL5dBv7GlgtYOmW/w9tqY6wmDYk/FR7vaJ5XjsBO00fP3sm7yV4oGhLwKuC3yGz680gL4gh5dyL87gvddQzvSqXyH8UfSQyIrx+8BTrsbNehK6Ris1XoXR8r1Bh/nSFwYR2CdpvI9ZR6tIbfUM5Vsm6rM1jXQ0dbdVR3hx+2wTCVHHJ5IyavPsVLKLvQo+dRuKyzS+sLsGoBSblhf5A0CN+6kmOhcWD+NxgIom8C8bsE4iaddnueZ4CdKF59fWvadmA4aKV2GuO7/rO1a1yU9TWu/ATm15bQRTN2dR4lxAcqSJLKy/Yj+O1l0UxzvJjg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=ndzh.com; dmarc=pass action=none header.from=ndzh.com; dkim=pass header.d=ndzh.com; arc=none Received: from DM8PR08MB7413.namprd08.prod.outlook.com (2603:10b6:8:a::9) by DM3PR08MB9433.namprd08.prod.outlook.com (2603:10b6:8:1ae::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9298.12; Fri, 7 Nov 2025 17:45:04 +0000 Received: from DM8PR08MB7413.namprd08.prod.outlook.com ([fe80::8a0:8971:98a2:37e5]) by DM8PR08MB7413.namprd08.prod.outlook.com ([fe80::8a0:8971:98a2:37e5%5]) with mapi id 15.20.9298.010; Fri, 7 Nov 2025 17:45:02 +0000 From: Susan Hares To: idr Thread-Topic: draft-jiang-idr-sr-policy-composite-path-03 - Question on precedence of Color setting Thread-Index: AdxQDi9aOuzRJbg6R+WZJZ3TgpcKaQ== Date: Fri, 7 Nov 2025 17:45:02 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Authentication-Results-Original: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=ndzh.com; x-ms-traffictypediagnostic: DM8PR08MB7413:EE_|DM3PR08MB9433:EE_|BY1PEPF0001AE1D:EE_|BN5PR08MB10586:EE_ X-MS-Office365-Filtering-Correlation-Id: 5ef50573-b505-4ea4-b9f3-08de1e25657a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230040|376014|366016|19092799006|1800799024|10070799003|38070700021|8096899003; X-Microsoft-Antispam-Message-Info-Original: =?us-ascii?Q?9CZg4wc7YYBucOPZDDow8VtUPIB5cVAhd8S2ywEwzRU6DkgBrL2xzjFDel7o?= =?us-ascii?Q?Ok+qLBFUspd803mn/U3VrgpGPPx6gwbauBTmsfy6lVa8a5jOK3G9fKI0Ikok?= =?us-ascii?Q?W06si40/2Ld2lJ+9+NDfnSLaqnGFREc/zAZaR/CCJBjiilLURTzm/xFHNV9J?= =?us-ascii?Q?HRQrgsPYGJhzgUVVmtvK/pjyseSlqAq7LFz4l4cvOJX/LW40oygTv2C/tOT9?= =?us-ascii?Q?MlygDjdItTdfFeTWZ4nJzPE0diIOc5GfFcb0d5UY/fz0tn9o5QUYrXFI3Tqr?= =?us-ascii?Q?4BmOLHus/mZe6Yz4wq8r156QUn6KnSS7d3AETW54Ow8B+B8kj5F+t/T9EXOh?= =?us-ascii?Q?5IuLdHMQuaoJT6nnwc1fJvnydAv5WgiiKPmOCP54x8IS0uCiTvmPdjI2nQHc?= =?us-ascii?Q?jkBsgEY5g9tT9K2EVFtujNwRTj6qhCjlMeATrnsH3X4wpvxenFVLu+ZDHtTv?= =?us-ascii?Q?vHKCQJYmdF3cm6dVcHgfbMIRlL5y1pELI5Vr8jPBZyY1B4/qx4GNrJmzyoK3?= =?us-ascii?Q?nS7P5OKI+LnbNdnRTB8XlVSGK+iump2CIOlz/xzTYOWmKnp8A+o6OY5Xt1jH?= =?us-ascii?Q?aoSsVunhuoT4s6QbNZTG+pEDni6QAOsECUi2F8tgNYZaofxW/lkxDtSPtvjr?= =?us-ascii?Q?Y/yBVm+yIqCAwA+bMDryhejr7eQl6zkUOHnkSVoba1DbtFlsHNL3vrO8/kxj?= =?us-ascii?Q?aiXM3l7O4WXmfVeqMNEJBuVNFpxPE/ztw6oMReAKXEfxWfndO5YuJ8HG7zxM?= =?us-ascii?Q?PuH2a36i5CC96gDfTMwv5YKJ1tqIZHy2Vqwm0AbpcoxeHVUJbRr83qB6bycl?= =?us-ascii?Q?FAmvY6mwhw4gyA7GedW1/pZso/n1G2+HgQyOubuVJLOmJgyCKK+UMwSz7f/8?= =?us-ascii?Q?taO9uTzEp1cdOKqv2yoJARKhBFY9ZwI8UhwIS48aFy5JK9RvG6/gzwIGjpzl?= =?us-ascii?Q?vTIcYUAIl2jWar7o2TkLhV5bwvioXIOsMbaGT1um1QLXJUmkTQ2gEHZvhXOR?= =?us-ascii?Q?s2hm91C3IZ6H1hPZ06r2+aTVM+FHhywIlUzGFxVebESG6VDMkNJ1HLegJy44?= =?us-ascii?Q?JylRCkuREkpQfwxOv+I77d1eQcrn/JFiH4xj3bWFg3P8izPkslOXIgmTR3MX?= =?us-ascii?Q?X4hqf1orbMtTiGXuaTUogkgzTpzM4k05xfPnIiZv+cL0nsARd438aO/4hwjJ?= =?us-ascii?Q?kcYK3TW4IOq7xpXxGu6fb1cVXo2Jy3cBgbLrygdAiCVCnWUtIfSkK9QZV/NZ?= =?us-ascii?Q?MneqsLFUN/cPeGKnhxW9yHTKJT2X9R1n6pU/SMuyrsrVU/Dqkrjq+5YdO8Ut?= =?us-ascii?Q?06KG3mFByiUQINvt0h/Vs2RBWp/y5RG2VMB3hpNPRKvlSLpf/YP2atdXTGqU?= =?us-ascii?Q?JiK1qT5XAxnPzvHlECJhWSLssl81fm0FbCsvUPBNLf5hbuiOrXcIZQFtjeCv?= =?us-ascii?Q?MhrWPddOmcEI3k15b0v5Ge+/1meV4nCKgJz6yiY55rEgSbHWvExA1/OKtX+O?= =?us-ascii?Q?678BFcRCkKvSJePm3arTchlPVuhPnt03k73g?= X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM8PR08MB7413.namprd08.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(366016)(19092799006)(1800799024)(10070799003)(38070700021)(8096899003);DIR:OUT;SFP:1102; Content-Type: multipart/alternative; boundary="_000_DM8PR08MB7413697CEA2EAC7F56CAA3DFB3C3ADM8PR08MB7413namp_" MIME-Version: 1.0 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3PR08MB9433 ARC-Seal: i=2; cv=pass; a=rsa-sha256; d=inkyphishfence.com; s=arc-20181011; t=1762537508; b=iGHhLwMXfIju3c7ZvbwaprBzz/xBytbqyXeMoHBCgt2YOvImKXmRsFENFneX2B8lr+vMI BtZ5U66eiWpDtzKbEmLgvDlCB18FZAdYdYRCmjRICrE1UuXT1NTiLeiak5qmAxC9A/zQK8E vdnNC7TcwY2cEy4HPXbzZXLObiWhavI= Authentication-Results-Original: obx-inbound.inkyphishfence.com; spf=pass smtp.mailfrom=ndzh.com; dmarc=pass header.from=ndzh.com; dkim=pass header.d=ndzh.com; arc=pass ARC-Authentication-Results: i=2; obx-inbound.inkyphishfence.com; spf=pass smtp.mailfrom=ndzh.com; dmarc=pass header.from=ndzh.com; dkim=pass header.d=ndzh.com; arc=pass ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=inkyphishfence.com; s=arc-20181011; t=1762537508; h=mime-version : message-id : date : subject : to : from; bh=wvXqcMRSWV9t7VcufTOylEn7do3E9tUywd5u1JGc9MU=; b=Dsxo11gPI4ZxfZ3P2G8B/6QG/yLY67wzcyBNWvAo+VCXHCGdJAEMmi8prz0/URPLbz8Y1 Ruo/iJfVEYqLpNg6cEkdmBEDqvd8AHCRkyAdLomlCFhw0mWpk2KtTQC+1zdQ5d2x40JZOlf kXOUPXRDDajN1NBQDknwhoZfHtFJCp8= X-Inky-Outbound-Processed: True X-EOPAttributedMessage: 0 X-MS-Exchange-SkipListedInternetSender: ip=[40.93.13.73];domain=DS2PR08CU001.outbound.protection.outlook.com X-MS-Exchange-ExternalOriginalInternetSender: ip=[40.93.13.73];domain=DS2PR08CU001.outbound.protection.outlook.com X-MS-Exchange-Transport-CrossTenantHeadersStripped: BY1PEPF0001AE1D.namprd04.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 0bb1b787-324f-40ed-d040-08de1e256150 X-IPW-GroupMember: False X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|14060799003|1800799024|35042699022|19092799006|376014|156008|36860700013|8096899003; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?PGONWXx/jOHcSqhMDFArhPaFveLYLllWSCdkNTPaKSjUlr5nQeqvKGQtddFS?= =?us-ascii?Q?uAjvMHj3ZFsa2ojJ6udO0O1+avYyKUWbG7OrC+B3sR18SP+VHB2Itax2PpyJ?= =?us-ascii?Q?/EDp1OBlZCxqEL/rcHVy1MYSX6A4E8B0KM3DiAkepRrglsbCx0Ap9VO/YGcj?= =?us-ascii?Q?53p9nP1I3d5EezjnEgzHZDTlGepQj2frwGQ2j2CmLyQMheNc9w0jaraLyHTm?= =?us-ascii?Q?NMEnv6aw8KK6sOUWiLs/iBe5X7cRtjNNtszqDmz1H2DXQ4a6R2DK2oSnLzWr?= =?us-ascii?Q?u3ImVr50C2PykYUI23dIE0aKchfAdBVwAdLgtugj9EL4WSGQTf8Aa8F/oKe/?= =?us-ascii?Q?/Cyx0i79yj1dqavonVlGBmnWho4A1bB/TRaEGyw5jZoz6fJfMkCBP4hPnAIr?= =?us-ascii?Q?uFf7o1euxTUejSFpSqh/fZyFnBY6j1zQrpoJlEh29s3IvVvQGcSDgieTvr4+?= =?us-ascii?Q?3wonIwEZXr1s6n1QKMnOVy8X5qm8WU2amLplYT1zmj5uF8i2lXCV1yIqxBdd?= =?us-ascii?Q?kHAZuug5M9PEyVogoGaMlLfh79EEr3Np8eXvnPuQPxjCyfYrRVF7ajfvlcRw?= =?us-ascii?Q?7yGYxDVozO3bN5wS0SKyd1hu36pEx3t/ofLtc48SMjl0Vu6XD/iKxm+AvZMW?= =?us-ascii?Q?S80zwQ2CSPV1mKkj5EaFbj2QdmN3/pkDfBEsfFC05GXHiZYE7qUnl+onNMs6?= =?us-ascii?Q?A8jnGj0Xlpd8N9P0g0YFgMRKoi/mzol3WmF+S3Mhi1MScApKz7gkFfwHzxpb?= =?us-ascii?Q?Ju/ia6AtdT/QIUz8bl7cdNNpMkP7Bx2zYsBF856/kCdAu0UhxYqhjtGIrSqe?= =?us-ascii?Q?TO3J9o5nY0TBiSwUeMjG/Fww9/QAinm+UfHBl0hOeokAkEL2BdziK+5Og1Re?= =?us-ascii?Q?wmEZ4aw4Kx4+zrWGWeOvpQm8IKv7VdoE+xMOh7QBQOo+YjHCW/NM53902iMU?= =?us-ascii?Q?jcUj9633m/U4elSuLhJnNslTS82RETtwtST2hjpBk1GNlJz1VhzkwIyIlpih?= =?us-ascii?Q?4IgYyTf47Zl2GOFdlSF0+kFS9jPvOfFVRTor9sb2uzNHW+FKKqH4VPACqDYU?= =?us-ascii?Q?A803D5NUoClZoevQX7l5jZ8sje8yiaWK1lJE/E9qTMv9YbTSbgtw61nj0A/g?= =?us-ascii?Q?nbLv6J9jv8tm922kICQv9XNplevuvVwwUvSHdU7sIJ6gwBpj+Q4+jHGVIPml?= =?us-ascii?Q?K0UNbxh0klryuRd3L/LFRllZ2Ru/q2FVKQ/bzaEA6VrGZSvPejQ/SPgSY7eG?= =?us-ascii?Q?uThhx3mdHKTuhp2OSSXNXfsLAba6VBU+WvU3qcQYeUEMCn5f/3CxkCD/S+F1?= =?us-ascii?Q?U16H0px/qq6Is5hnqhQnFpmSuS2O+JYQcaXH8qRXp+I3/mBfSYe7OKe3iB8I?= =?us-ascii?Q?Q/R12dea9qUolQQKPARBqbpgzd4w6DDmV6TqgQ498/22TfelZ6wQltgkzUDz?= =?us-ascii?Q?rDLbGneR6/3krQYWaaZi6zdLXYGXbFI7cCehEZYtD5VEzR5tdBQc9490l8LT?= =?us-ascii?Q?s859rRQShpe2oyJG0GVNdzGzz1bTzcbpR93C76axhRKDF1l+sjpnr9fX0w?= =?us-ascii?Q?=3D=3D?= X-Forefront-Antispam-Report: CIP:13.59.96.180;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS2PR08CU001.outbound.protection.outlook.com;PTR:mail-ds2pr08cu00101.outbound.protection.outlook.com;CAT:NONE;SFS:(13230040)(82310400026)(14060799003)(1800799024)(35042699022)(19092799006)(376014)(156008)(36860700013)(8096899003);DIR:OUT;SFP:1102; X-OriginatorOrg: ndzh.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Nov 2025 17:45:09.6739 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5ef50573-b505-4ea4-b9f3-08de1e25657a X-MS-Exchange-CrossTenant-Id: d6c573f1-34ce-4e5a-8411-94cc752db3e5 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d6c573f1-34ce-4e5a-8411-94cc752db3e5;Ip=[13.59.96.180];Helo=[us-east-2b.obx-outbound.inkyphishfence.com] X-MS-Exchange-CrossTenant-AuthSource: BY1PEPF0001AE1D.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN5PR08MB10586 Message-ID-Hash: V4YJX2P5PRTCERS6AHS4TY24JLPTXRKN X-Message-ID-Hash: V4YJX2P5PRTCERS6AHS4TY24JLPTXRKN X-MailFrom: shares@ndzh.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-idr.ietf.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9rc6 Precedence: list Subject: =?utf-8?q?=5BIdr=5D_draft-jiang-idr-sr-policy-composite-path-03_-_Question_o?= =?utf-8?q?n_precedence_of_Color_setting?= List-Id: Inter-Domain Routing Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --_000_DM8PR08MB7413697CEA2EAC7F56CAA3DFB3C3ADM8PR08MB7413namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Jeffrey Haas12:04 (chat)- statement I think this is a broader concern with sr policy as a mechanism rather than this extension in particular? Sue's specific Question: What is the precedence (and interaction) of possible ways To specify color in the Tunnel Encapsulation Attribute. See the different ways you can specify color that could Impact a segment that is part of a segment list. References =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Way 1: draft-jiang-idr-sr-policy-composite-path-03 defines Constituent SR Policy with Color Sub-TLV in the following manner: SR Policy SAFI NLRI: Attributes: Tunnel Encaps Attribute (23) Tunnel Type: SR Policy Binding SID SRv6 Binding SID Preference Priority Policy Name Policy Candidate Path Name Explicit NULL Label Policy (ENLP) Segment List Weight Segment Segment ... Constituent SR Policy Color Weight Forwarding Class Way 2: RFC 9012 - Tunnel Encapsulation Attribute carries: 3.4.2. Color Sub-TLV (Type Code 4) The Color sub-TLV MAY be used as a way to "color" the corresponding Tunnel TLV. The Value field of the sub-TLV is eight octets long and consists of a Color Extended Community, as defined in Section 4.3. For the use of this sub-TLV and extended community, please see Section 8. The format of the Value field is depicted in Figure 15. If the Length field of a Color sub-TLV has a value other than 8, or the first two octets of its Value field are not 0x030b, the sub-TLV MUST be treated as if it were an unrecognized sub-TLV (see Section 13). Way 3: In addition, RFC9012 defines interactions with the Color Extended Co= mmunity. 4.3. Color Extended Community The Color Extended Community is a Transitive Opaque Extended Community with the encoding shown in Figure 15. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 0x03 (1 octet)| 0x0b (1 octet)| Flags (2 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Color Value (4 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ --_000_DM8PR08MB7413697CEA2EAC7F56CAA3DFB3C3ADM8PR08MB7413namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Jeffrey Haas12:04 (chat)- statement  

I think this is a broader concern with sr policy as a

mechanism rather than this extension in particular?

 

Sue’s specific Question:

What is the precedence (and interaction) of possible ways

To specify color in the Tunnel Encapsulation Attribute.

 

See the different ways you can specify color that could

Impact a segment that is part of a segment list.

 

 

References

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Way 1: draft-jiang-idr-sr-policy-composite-path-03

defines Constituent SR Policy with Color Sub-TLV in the fol= lowing manner:

 

      SR Policy SAFI NLRI: <Dis= tinguisher, Policy-Color, Endpoint>

          Attr= ibutes:

          = ;    Tunnel Encaps Attribute (23)

          = ;        Tunnel Type: SR Policy

          = ;            Binding= SID

          = ;            SRv6 Bi= nding SID

          = ;            Prefere= nce

          = ;            Priorit= y

          = ;            Policy = Name

          = ;            Policy = Candidate Path Name

          = ;            Explici= t NULL Label Policy (ENLP)

          = ;            Segment= List

          = ;            &n= bsp;   Weight

          = ;            &n= bsp;   Segment

          = ;            &n= bsp;   Segment

          = ;            &n= bsp;   ...

          = ;            Constit= uent SR Policy

          = ;            &n= bsp;   Color

          = ;            &n= bsp;   Weight

          = ;            &n= bsp;   Forwarding Class

 

 

Way 2: RFC 9012 – Tunnel Encapsulation Attribute c= arries:

 

3.4.2.  Color Sub-TLV (Type Code 4)<= /p>

 

   The Color sub-TLV MAY be used as a way to &quo= t;color" the corresponding

   Tunnel TLV.  The Value field of the sub-T= LV is eight octets long and

   consists of a Color Extended Community, as def= ined in Section 4.3.

   For the use of this sub-TLV and extended commu= nity, please see

   Section 8.

 

   The format of the Value field is depicted in F= igure 15.

 

   If the Length field of a Color sub-TLV has a v= alue other than 8, or

   the first two octets of its Value field are no= t 0x030b, the sub-TLV

   MUST be treated as if it were an unrecognized = sub-TLV (see

   Section 13).

 

Way 3: In addition, RFC9012 defines interactions wit= h the Color Extended Community.

 

4.3.  Color Extended Community

 

   The Color Extended Community is a Transitive O= paque Extended

   Community with the encoding shown in Figure 15= .

 

      0    &nb= sp;            =   1           &= nbsp;       2     &n= bsp;            = ; 3

      0 1 2 3 4 5 6 7 8 9 0 1 2 3 = 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-= +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

     | 0x03 (1 octet)| 0x0b (1 octet)|&= nbsp;       Flags (2 octets)   = ;    |

     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-= +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

     |     &nb= sp;            =     Color Value (4 octets)     &nbs= p;             = |

     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-= +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

 

 

 

--_000_DM8PR08MB7413697CEA2EAC7F56CAA3DFB3C3ADM8PR08MB7413namp_--