From zzhang@juniper.net Thu Nov 30 12:53:31 2023 Return-Path: X-Original-To: bess@ietfa.amsl.com Delivered-To: bess@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2E30CC14F73E; Thu, 30 Nov 2023 12:53:31 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.806 X-Spam-Level: X-Spam-Status: No, score=-2.806 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=juniper.net header.b="f+c0GM0B"; dkim=pass (1024-bit key) header.d=juniper.net header.b="Pda5tReO" Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hgeKQKaVrCSE; Thu, 30 Nov 2023 12:53:27 -0800 (PST) Received: from mx0b-00273201.pphosted.com (mx0b-00273201.pphosted.com [67.231.152.164]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 20C9EC14EB1E; Thu, 30 Nov 2023 12:53:23 -0800 (PST) Received: from pps.filterd (m0108162.ppops.net [127.0.0.1]) by mx0b-00273201.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AUJWDwr022486; Thu, 30 Nov 2023 12:53:23 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juniper.net; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-transfer-encoding : mime-version; s=PPS1017; bh=DJSoohYfrAyGR/JWD/scI8lswO27z0U1FpWydHSL6hQ=; b=f+c0GM0By8IL0Tb4qQKf8kDyZ8RsZS9Dii3EE8d47sZSKC09Mdmb4NAk7NKiPrudT5Qw 6DfEVsMd2JZFbqBhBhlqjRPN+TzCcnJdqQS1xtOdWPeBYmpLV6B190+aYoWfdZtIfUDM YRyGstQflak4q9g/vshiOgtGyjVsJKRn267uQkVHgeJI8M+aQushv9axBzd1fc/W/jPL LR8sj0wjdu22i68WcfJyKTB8+9J3vIYHxpUesmZ7ZW+1SllKfU8tNUCKtg6chelaeejJ btRHjS5gYViDa+xxNMkRSrWn83ElUyPkLSJqOWBPGp8Hd1tQIbIsSfWhB+wHx5DTGp/Z Lw== Received: from dm4pr02cu002.outbound.protection.outlook.com (mail-centralusazlp17013036.outbound.protection.outlook.com [40.93.13.36]) by mx0b-00273201.pphosted.com (PPS) with ESMTPS id 3up9jhvnq6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 30 Nov 2023 12:53:22 -0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Ln3HruokC8oKTZQLKNPGP35fxp/x9mESD4fwK++whk5svvq7dW8R6vhnVXImVkvmTx78Luilm0jLH01FzvqcPSZY+33tdZdhRqKJ09X0tlDE7H70HkqzcmOf5Lv2JOOl3SW8n7eYy7sUpWnE4+PsqkvbLYfnrgxlOMcGkKssQ9C39tadldRw5khLC4GV3kYil3z1xeUoEyN7aASWphmQDDjSDeyQH6gvNN1mUZLM0l9nrtDoBJ18khZiBfbQO9eSLZMIdTjb0TI/Kd+qcGoSeVAGjIeRS7aInCaeVPlO8YopCwThJivtRDYPlHrjUjvv0jTCvb+eV4sYg+IFDO1JcA== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=DJSoohYfrAyGR/JWD/scI8lswO27z0U1FpWydHSL6hQ=; b=K3PA/zTZRfqq6Hef+hGAtvykmNPwYHfKgbVBknHA/JWdgJq1/v5ZEBuVrSLA5fZqiu64niqtNcMq6GP+4dPisqlv2Gj4tEC9C21Rc0j8CiqcHM1tywY4RDjKMXEM5+Kxg/tQiMT/vm03uhfdyHObIMVbW5eNiIFXj18I4uSWFWu9lKHGDLLXWPfB8Smb30XwqmMiRnrc5VPyyU5zJreKKNwEeObyW2gsgHJ1j6y5HMM8zAU8vO6lVlIZP19zqUrFhCxEOwWXGQ8Gyh0BJw6zxk99VsVINpzO0fsq4yP7uOZjv6zcFzIHbIum+L5JMBtMKIMEWl/sDPF2f5vJMImZpw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=juniper.net; dmarc=pass action=none header.from=juniper.net; dkim=pass header.d=juniper.net; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juniper.net; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=DJSoohYfrAyGR/JWD/scI8lswO27z0U1FpWydHSL6hQ=; b=Pda5tReOVW6pUn/sGWgoof6LFnrY8K/Q37wY8Jm+xc0nOzUPUsRrJqp9XLhV8OjXf5QEE+/WbN/oP/jgG/gyLy3Dou14WLqRThY0P1J5SIg1Dq6g6yU5A8NlL/CmnOq7r97pabjNgO60+Xwuu9gb7jIpneZyvUyXhCQKvRl0Y64= Received: from IA1PR05MB9550.namprd05.prod.outlook.com (2603:10b6:208:426::16) by BY3PR05MB8162.namprd05.prod.outlook.com (2603:10b6:a03:3b5::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7046.24; Thu, 30 Nov 2023 20:53:11 +0000 Received: from IA1PR05MB9550.namprd05.prod.outlook.com ([fe80::c683:c1f1:27d:3b03]) by IA1PR05MB9550.namprd05.prod.outlook.com ([fe80::c683:c1f1:27d:3b03%5]) with mapi id 15.20.7046.023; Thu, 30 Nov 2023 20:53:10 +0000 From: "Jeffrey (Zhaohui) Zhang" To: Joel Halpern , "gen-art@ietf.org" CC: "bess@ietf.org" , "draft-ietf-bess-bgp-multicast.all@ietf.org" Thread-Topic: Genart early review of draft-ietf-bess-bgp-multicast-05 Thread-Index: AQHaBeMavm5bbvTlT0mF499yVtMBWrBX0XtggDu9UEA= Date: Thu, 30 Nov 2023 20:53:10 +0000 Message-ID: References: <169808758575.55895.5154079849017687000@ietfa.amsl.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_ActionId=ccc8c308-6262-4fae-a343-798771ba5454; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_ContentBits=0; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Enabled=true; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Method=Standard; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_Name=0633b888-ae0d-4341-a75f-06e04137d755; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SetDate=2023-10-23T20:22:21Z; MSIP_Label_0633b888-ae0d-4341-a75f-06e04137d755_SiteId=bea78b3c-4cdb-4130-854a-1d193232e5f4; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: IA1PR05MB9550:EE_|BY3PR05MB8162:EE_ x-ms-office365-filtering-correlation-id: 3e865e4e-f8bf-4cb8-7a91-08dbf1e65cce x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: /09iY6VnO9TLsF7PAE9pW2D9rTPoikwQlFCKK36zckyz2tY8MU95V1ycG/06lC3ZxwgN02MrwcpumzlEI9tZrHUcb35Su+leFvMQiVpBV6BtbiNTcraM84SbtrRd4mJ0ER8BvvZYq4Z8QGg3zxPrAszejBQtBImdRVHnCzBXRlVPRD3dQCk6F9Xhv6WAfHaITB5jlm9NKpi7RWwrfJvk0etBxs4AVby6BDMUtVvb5nIPXMFT6Xm9BBYE1CByxAcPoX7VUwpZWVESlUjybe7fgyqmmasjih7AcTkuM2tmOsdC9lINdE+Lfc8/Ja1M+RTYsqn8Bg8sqyRFbxjEHfyTte881wHgNGph9bKd/Xq9kLBMZOXRaH7utOPToa1nB6x0E5+I4i1qr6mCBxGHKjDj4PqYtPv68LJJLr0vk4THxnNyy32LYhPqc+HD7eM6+z1nq3K8zzGtUQSKkd9Bpwhnvq73wcg6QP/VOOp9lnaqAZDDX3/BIheJo6lDbLHd0q0uCYnpOP2qH/CIGkfx7+9HZsgwOxDPXxK1+Z+rGh3/aZtxxE83szEvpmYx1hKAb924YA8RloGHM1tjHFTdQOfjkeIelRGcXt+zAUcX1c/vArkgYH90UEY3cQU7BfHTRQrylwwOFsqVw8iEkvwu9e/zdCbxAUu5cBlGlJ91Pfha+HeoKgLHuznjYkxnQyo3vFdH x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:IA1PR05MB9550.namprd05.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230031)(136003)(366004)(396003)(376002)(39860400002)(346002)(230273577357003)(230922051799003)(230173577357003)(64100799003)(1800799012)(451199024)(186009)(66899024)(2906002)(71200400001)(5660300002)(966005)(478600001)(4326008)(8936002)(8676002)(86362001)(52536014)(66446008)(316002)(54906003)(66556008)(66946007)(76116006)(110136005)(64756008)(66476007)(6506007)(26005)(7696005)(55016003)(33656002)(83380400001)(66574015)(9686003)(122000001)(53546011)(38100700002)(41300700001)(38070700009); DIR:OUT; SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-7?B?eGRJKy1NTHhFUVNqYnhIVVVMZmR0R1BlOFJualkxN1MvU3dHZnJQNS9FbFVk?= =?utf-7?B?c2ZLdjJVSlJveEJ2NlVhNWV4VTIySVNLMk9KL010ZmhGQmRHRjRqeVlBQkRB?= =?utf-7?B?YVN1eTZnelExYVNpR2VFUHFGRW9lc25RS3FseXNyTm5NdW41M1FWcEkwUGlO?= =?utf-7?B?ZEJYSUhBV3NMTmU0bzdudGdNempJaXVzOFM1OHpuUnZiM3ZEZUlsaEtPZGxW?= =?utf-7?B?WHowOGpSYkh0V0VsNjFtTWF2VlNNSkpPYTc1Z3RrSWJXMGtHS0thT0NlQlBD?= =?utf-7?B?RXVSWFVFamNwc2VrVlBUYkQ1YkJKc05seHpWb1VhZkJFQ3Fpc0ZMT244UW9W?= =?utf-7?B?dWpueHhmb2M3Ky1nKy15SXdZdEdWdkN4ZENPNExDTWlJeUx2cW5SS3U0NnVT?= =?utf-7?B?djRTaTEvS0J2M3RLeGR1SUc2QkpUWHVCTHlVajZvOUx5dE5WWVVQUmdNQ2lE?= =?utf-7?B?Z3JnbnBWbHRQb29uR1RMc09JSjRuWHRVQkthczI1dU5VeGd4RHltdG55U2lF?= =?utf-7?B?dmJNQnVtVjc1RzRBdCstbk1qbzVIMFpjOTE1RmpWUXc5SjlaMmhTUDFoOHR6?= =?utf-7?B?SkFoV0dMbTJLamd4cndFQklRTWsvTjNvRmZrYVRHVkRvQlBONmxMWDVoR0ZH?= =?utf-7?B?SEVvL2gxMW9RVExxc0hiUmtsMUpQRkkzT2hEeW9GSmhySVcwWm5XSFd3YjQ3?= =?utf-7?B?cWlLKy15amNDQWo3WkY2RUw5c21nZGFGRldEbUhvMXd5cDk0cHlXRHZzbEhV?= =?utf-7?B?TTIrLTJ0NFppVkdSWFlzQU1NVzBJZ2c0Mmd1ZER4NW1XRjROZW9wNk1SUDFa?= =?utf-7?B?YjE2dXFjTUgwUjlNd3BOejN3U3htQUcwOUxhQysteGl0Nk9SSnc5QzhQaHFa?= =?utf-7?B?ZXZPbzNrVnRpWGprT2xlM0Jnc2FhWDh1VnUrLUdlbmFYZ29Cb1MvYnZ2aDVW?= =?utf-7?B?eHRUTExYWERoNXcydm9MeGozby9tUHFKaXRhdUZGTzYweUhpaGpaUkllaEZx?= =?utf-7?B?a1k1UGw4Um0wYWZ3SEdkOEg5Zzg3TGVLM2hzY1JYKy1lMzV4cDdKbTlXYWdP?= =?utf-7?B?SXU2REV6QWZXZUFMZVp3bDllYm5zOG1mWnpFaUNucW96Qml4aldjLzR1M3BL?= =?utf-7?B?ZXdKbmJnclBNVUZ3TTlITzBOTWFIWk92c2p0cndtNDUzeGlha0JhT1NmSlMz?= =?utf-7?B?bnkvVE0zbnI3aDZJMDZHb09sL2wrLU1hb0tDVjE0SWtmdThRS1hrVU5aaHBi?= =?utf-7?B?VWR6SEhDL1o5SnBDRGhvSDF5cks1ZHFWOGNwMEo2U083MjJNaXp4Ky1DMUNl?= =?utf-7?B?UmtBdnpsYTVUSDhzaE9OS1MxbGpoOXdGV0hNaTl3WURwMVNDZDh4YTBuY2Ev?= =?utf-7?B?TFVWMFN2VTNtUTEya0RlOEJBbzRnZHk4MEJwOXA0TTFudWI3b0Z1emJyYzFI?= =?utf-7?B?bVVkcndGY0ZJWjAyTjc1OHJSN1ZFUGRXTW5aU2VCOGNyZDdWWVVmWHdJWist?= =?utf-7?B?MDBLL3ZLdms5V25xcmplbDhkTXN0dkg0ZXRqbkRmU1F4TnBoOGhlMXFjNlBQ?= =?utf-7?B?bkZNMkhqOThoOVJWRDdrZTFUS2JseTN1TnZnL21RZmRtbk9pRW1rRHczQVJt?= =?utf-7?B?MDZ4YWdKT3dVQkh3aWpZeWdoUVc3U1lIWistSUxBSnZPS2o4T0VtU2dTcmtq?= =?utf-7?B?MVVnSW00SEg3L3lkWistZUpMcDkrLVd2enBOeG5ZNzdSQzhLenNLb0FTQjlq?= =?utf-7?B?cW12R2JNNW9zcU13Ykc2RFlNOFNtbWw5eVJHMk52SHFIakdVWXZPWGs2a1Vs?= =?utf-7?B?blM4aEdsaUo3UlhSVnpQMU5uUFVCaXJaQzh5V0k3VUN5dUhPcmRGcHFNL0RX?= =?utf-7?B?WC9IMkZ1NmpPN0dSTHhud0R4aHcveEsrLWFlMjRmQjVoVkRMMVpQM2JUQUdK?= =?utf-7?B?WDVRZDgzYWhPV1dHMERRb0JKeDhrWDRMcm1YeG1IYmpwNnZqZlptZDhTd3JP?= =?utf-7?B?TFZ4WTZwd08zMU5pVWRyR1orLUFPYjdXNnRpZVAvV1pzR2toQWpHNE1Mb1lB?= =?utf-7?B?ZkxDc28vUE5EWDZ0ajc3SSstNDV3b1o2R0NpWmdCTml6WG14THdQazVNbmw=?= =?utf-7?B?Ky1JVGtwOEtZTVUwZ3gxaTdLUnFNZnRqVTY2dkNnNm44S1hhRFRKRlFxcnhQ?= Content-Type: text/plain; charset="utf-7" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: IA1PR05MB9550.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3e865e4e-f8bf-4cb8-7a91-08dbf1e65cce X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Nov 2023 20:53:10.4404 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: FqOfh+6id+tMLrtjJeW2Eov8y1I634Ul2iURRbNQRm5Eknf8MW3IKXryCgbuNSLfZ8RAqowbl95EEANVSaq51w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY3PR05MB8162 X-Proofpoint-GUID: UMV4tC7_ckVTwXoMZoxbkjZIK2z4N_8h X-Proofpoint-ORIG-GUID: UMV4tC7_ckVTwXoMZoxbkjZIK2z4N_8h X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-30_20,2023-11-30_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 phishscore=0 bulkscore=0 clxscore=1011 adultscore=0 priorityscore=1501 suspectscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311300153 Archived-At: Subject: Re: [bess] Genart early review of draft-ietf-bess-bgp-multicast-05 X-BeenThere: bess@ietf.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: BGP-Enabled ServiceS working group discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Nov 2023 20:53:31 -0000 Hi Joel, We had offline exchanges and I just posted the -06 revision that addressed = all your comments: https://datatracker.ietf.org/doc/draft-ietf-bess-bgp-mul= ticast/06/. Thanks again for your thorough review and lots of comments - a great help i= n improving the document quality. Jeffrey Juniper Business Use Only -----Original Message----- From: Jeffrey (Zhaohui) Zhang Sent: Monday, October 23, 2023 4:23 PM To: Joel Halpern +ADw-jmh+AEA-joelhalpern.com+AD4AOw- gen-art+AEA-ietf.org Cc: bess+AEA-ietf.org+ADs- draft-ietf-bess-bgp-multicast.all+AEA-ietf.org Subject: RE: Genart early review of draft-ietf-bess-bgp-multicast-05 Hi Joel, Thanks for your review and comments. I will address them and come back. Jeffrey -----Original Message----- From: Joel Halpern via Datatracker +ADw-noreply+AEA-ietf.org+AD4- Sent: Monday, October 23, 2023 3:00 PM To: gen-art+AEA-ietf.org Cc: bess+AEA-ietf.org+ADs- draft-ietf-bess-bgp-multicast.all+AEA-ietf.org Subject: Genart early review of draft-ietf-bess-bgp-multicast-05 +AFs-External Email. Be cautious of content+AF0- Reviewer: Joel Halpern Review result: Not Ready This is a requested genart early review of draft-ietf-bess-bgp-multicast-05 Prepared on 23-Oct-2023 Summary: This draft is not ready, having a number of issues that need to be= addressed. I presume this draft will be socialized with the PIM and IDR working groups= before completion (or maybe it already has been?) Major: While I appreciate the effort to give an overview of the operation befo= re providing the specification, the actual text is almost impossible to follow. At a guess, the authors have a coherent view of what happens,= and have then written down each +ACI-interesting+ACI- piece. This does no= t give the reader clarity. As a first step, before giving the overview, all the terminology needs to be defined. Including such things as the fact tha= t MCAST-TREE NLRI is a general holder, within which there are a number of different NLRI (which is finally explained in section 2, after the read= er is thoroughly confused.) All terms and abbreviations should be defined= or, when they are from other documents, expanded with a citation so the rea= der knows where to look for the term. (I did figure out what FHR and LHR w= ere, but the draft did not help me do so.) Secondly, the extensive use of construction of the form +AH4-this use of construct A is just like the = use in document B except...+AH4- is very confusing. The reader is left withou= t a coherent description of how this protocol works, exactly which pieces f= rom the other document must be followed, and exactly how the changes are to= be applied. Third, if the intention of the introductory material is to pro= vide a perspective on, but not duplicative specification of, the material in section 2.2, then each overview should have forward references explaini= ng where the detailed procedures can be found. If material in the overvie= w is intended to be the normative specification of the operation (as for exa= mple when and which rotue communities are to be used, and apparently all of section 1.2.1.1) then normative language is needed. It is quite hard t= o exgtract from these sections the required procedures. I also note that ID-Nits ha a lot of complaints. I will not repeat the= m, but they need to be dealt with. (For example, the addresses used in var= ious examples are not example addresses. They should be.) Scaling needs to be better addressed. While I understand the use of RT constraints helps the avoidance of overloading the leaves of the tree, = it appears that any network using route reflectors is likely to have state about every sender of every multicast group in every rotue reflector. = It may be that this is acceptable. But it should be called out explicitly= . Section 2.2.1 sates that source advertisement will be triggered only by sou= rces sending multicast traffic. And will expire based on time. Except tha= t the network has no idea what the suitable time interval is for a given mu= lticast group. Some groups will have long inter-packet intervals, while so= me will be short and some will be quite variable. Also, some groups will h= ave the property that the senders will know who they are before sending, an= d receivers may even want to join before the senders are active. If the wo= rking group wishes to exclude such use cases, then the document should be e= xplicit about what use cases it is covering. Moderate: Additional explanation is needed in section 1.2.1.2. This section describe= s how to set up a shared tree for an ANY-Source Multicast Group. Unlike th= e earlier discussion of advertising sources with a route target community t= o restrict distribution, this section explicitly says that the sources send= ing to the ASM Group are advertised in BGP without the restricting communit= y. I presume there is some other assumed aspect that restrits the informat= ion so it is only received by the Rendezvous points for the shared tree. B= ut I can not see how this is achieved. Please add explanation of why this = approach does not flood the whole domain with information it does not want = or need. The last paragraph (short) of section 1.2.1.2 gives a vague description of = certain cases. Presuming it is described in more detail later, a forward r= eference would be extremely helpful. Section 1.2.1.3 has very confusing use of ingress and egress PE. I would h= ave assumed ingress and egress were in terms of the direction of traffic fl= ow (from traffic sources to interested receivers). But the usage in both p= aragraphs seems to be exactly the opposite. Section 1.2.3 refers to establishing information via an IGP (+ACI-IGP neigh= bor discovery+ACI-). Except that the earlier descriptions indicate that th= e deployment case here is for a pure BGP domain, with no IGP. (Otherwise, = there would need to be extensive procedures as to how the multicasts traver= se regions that use the IGP instead of BGP.) Section 1.2.4 discusses handling when multiple itnerfaces connect two peers= and one is sending multicast traffic to be received by the other. THe tex= t seems to say it just works. The receivers receives whatever is sent, and= the sender sends on whatever interface it wants to use. This seems insuff= icient. For example, suppose we have several routers, one upstream router = A, with two downstream LANs, Lan 1 and Lan 2. Routers B and C are on Lan 1= , while routers C and D are on Lan 2. And all three of A, B, and C subscri= be to receive a specific multicast. It appears that A will need to send th= e multicast on both Lan 1 and Lan 2, so that B and D receive them. Which m= eans that C will receive two copies of the multicast. And apparently there= is no procedure for C to know this is happening and ignore one of the two = interfaces. Section 1.2.7 discusses the interaction with BGP Classfull transport (draft= -ietf-idr-bgp-ct). CT is one of two competing experimental approaches (CAR= is the other). This draft should either discuss interaction with both of = them, or neither. And if it is going to discuss interaction with experimen= tal proposals, it should note that at the time of writing, they are experim= ental. As an example of the problem of using references to other drafts without su= fficient specificity, section 2.1.4 +ACI-The encoding is similar to the sam= e route in +AFs-RFC7441+AF0-.+ACI- does not tell the implementor what the e= ncoding is. It tells him to guess. I presume this draft is intended to work with IPv4 and IPv6. Examples shou= ld be included using both kinds of addresses. Section 2.1.7 Topology/IPA Extended Community should include either an expl= anation of what this community is for, or a reference to where else in the = document this community is described.