Re: [pim] pim wg adoption call for draft-chen-pim-srv6-p2mp-path-01

"Ehsan Hemmati (ehemmati)" <ehemmati@cisco.com> Fri, 22 January 2021 18:45 UTC

Return-Path: <ehemmati@cisco.com>
X-Original-To: pim@ietfa.amsl.com
Delivered-To: pim@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 299313A13F9 for <pim@ietfa.amsl.com>; Fri, 22 Jan 2021 10:45:35 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.619
X-Spam-Level:
X-Spam-Status: No, score=-9.619 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_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=EGLvDUhM; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=U+qSwr83
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 xJMk2bu_A19S for <pim@ietfa.amsl.com>; Fri, 22 Jan 2021 10:45:33 -0800 (PST)
Received: from rcdn-iport-8.cisco.com (rcdn-iport-8.cisco.com [173.37.86.79]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D4FA73A13F5 for <pim@ietf.org>; Fri, 22 Jan 2021 10:45:32 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=57211; q=dns/txt; s=iport; t=1611341132; x=1612550732; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=0/sa43zCpZaGGiI5yfGc1MaBFf7qrMt5WaPECF6hl3s=; b=EGLvDUhMfSdpe2mUniXG/P6RZyPIx+wu4dHkyx1Ld+iN/wuB7hsySzGr n/vJ0Eme/R5KCx+g+xHPor0FV/apZJwDkuMN6PiVSQHXsD8kSy9oCpDBF ojcWjGgBM2R9tEyPldUDMfXJ6VmBqSvp/7uUAOT+ksnluN/kWJz6VXUqU 0=;
IronPort-PHdr: =?us-ascii?q?9a23=3As/RH/BOaSCGolPvxhp4l6mtXPHoupqn0MwgJ65?= =?us-ascii?q?Eul7NJdOG58o//OFDEvK8x3lPMVJ/QrfNJl+SQtLrvCiQM4peE5XYFdpEEFx?= =?us-ascii?q?oIkt4fkAFoBsmZQVb6I/jnY21ffoxCWVZp8mv9PR1TH8DzNFHXq2e5qz8fBh?= =?us-ascii?q?u5MhB6daz5H4fIhJGx0Oa/s5TYfwRPgm+7ZrV/ZBW7pAncrI8Ym4xnf60w0R?= =?us-ascii?q?DO5HBPfrdb?=
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0AJAABwHAtg/49dJa1iGgEBAQEBAQE?= =?us-ascii?q?BAQEDAQEBARIBAQEBAgIBAQEBQIE7BQEBAQELAYEiMFEHdlsvLwqHfgOEWYk?= =?us-ascii?q?0A5kXgS4UgREDTwULAQEBDQEBGAEFDwIEAQGESgKBeAIlNAkOAgMBAQsBAQU?= =?us-ascii?q?BAQECAQYEcYVhDIVzAQEBBAEBGyMBASwLAQsEAgEIEQQBASEBBgcnCxQJCAI?= =?us-ascii?q?EAQ0FG4MLAYF+VwMuAQ6oHQKKJXSBNIMFAQEGgkyCUBiCEQMGgTgBgnaKRyY?= =?us-ascii?q?bgUE/gRABJxyCVj6CXQEBAgGBJwESAUcHgyCCLIFpgUMEQw4CCVILMmsBA5s?= =?us-ascii?q?YnGqBEQqCd4kwkjsDH4MrijOFY48zkxMMf4sekkWDcAICAgIEBQIOAQEGgVY?= =?us-ascii?q?6Z3BwFTsqAYI+PhIXAg2OIQwXg06FFIVEdAI1AgYKAQEDCXyKCAGBEAEB?=
X-IronPort-AV: E=Sophos;i="5.79,367,1602547200"; d="scan'208,217";a="853118409"
Received: from rcdn-core-7.cisco.com ([173.37.93.143]) by rcdn-iport-8.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 22 Jan 2021 18:45:31 +0000
Received: from XCH-ALN-001.cisco.com (xch-aln-001.cisco.com [173.36.7.11]) by rcdn-core-7.cisco.com (8.15.2/8.15.2) with ESMTPS id 10MIjV42016804 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=FAIL); Fri, 22 Jan 2021 18:45:31 GMT
Received: from xfe-aln-001.cisco.com (173.37.135.121) by XCH-ALN-001.cisco.com (173.36.7.11) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 22 Jan 2021 12:45:30 -0600
Received: from xhs-rcd-001.cisco.com (173.37.227.246) by xfe-aln-001.cisco.com (173.37.135.121) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Fri, 22 Jan 2021 12:45:30 -0600
Received: from NAM12-MW2-obe.outbound.protection.outlook.com (72.163.14.9) by xhs-rcd-001.cisco.com (173.37.227.246) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Fri, 22 Jan 2021 12:45:30 -0600
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=kuVbgDGnu5Yiz+vlgwAcyzdEJNI2mOtUHD+1qq66bDcQCHTdVRbw65j0/quCZFuLkoIkUIr686g3XmIZHZqx2bkmAsx7g4LtGB7yxjP7WtleLfvBX7QKx5ZDrtifKkaerApju4cjwz+WFm7LRjEDH6j4F5vL9brDUIDAfHu+xesi6EglOhujchwh5fR98y7GNvmygGioDk0niOjiNkcXUEFuj9Af710C+Unltge7pKBdMdyEc8Z8CIKtjTUfHp/9oZzLapDVsQQy43ZbpZ29zqaPg3IEXPukrtjtECXMRqEsU7Vdww8nwOMZQ3cjqR5qEVwf6ssT2xP6h+7OFgZoNg==
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=T5moIZ32nwmEpyWv2SpgGMtlCnOtisIgMZfjld+8gII=; b=OkU0WE3jAYRi877d8UnYmPji+7T8y+ZYih/k8GWGwxjJxR+UY/xKCrlX1vcD8IrkydXvVyShGG64un5DTck8ziDz3+rc01SllsWAV3pC6iw2o1sgzWjRXYmxbVA4S+bGJ7Bu8W3MyXYjrSjsHNcPb85YP9KBN8zKZUoyV9N91jq8ujhwuYW0FCBGYZtv+lFT6U6Vxx3wVoZN9tQoC6CjmBg3/i7lj6/gJ8PsrJo6FQFH+H+jeYJioSD3HNjucy+WCRL6rAMDROg/0/UPokET8EsPDEOWa97YK6Se3GEqHN3otCgFFD+qcV0bSfy4FlqfnkfpdKbr7luOi20M3YEroA==
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=T5moIZ32nwmEpyWv2SpgGMtlCnOtisIgMZfjld+8gII=; b=U+qSwr83iGsShW9JOKoeYpIIKnnTZLaKwb9vmb8s+8ma21JbSZk40pK7X9F6JdDUo0fmJ+1EKzAgkJNyYHj7fgqAiD4ftTO0pExyZSsmigljQAdaN6sFd5CwTC1e1Ne4jAYEbfXoVwWZ+OL8EKY8psxIae3VJTID9hyeRj7mwCk=
Received: from BYAPR11MB2696.namprd11.prod.outlook.com (2603:10b6:a02:c5::29) by BYAPR11MB3704.namprd11.prod.outlook.com (2603:10b6:a03:f9::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3784.13; Fri, 22 Jan 2021 18:45:28 +0000
Received: from BYAPR11MB2696.namprd11.prod.outlook.com ([fe80::f9e4:dba6:9571:928c]) by BYAPR11MB2696.namprd11.prod.outlook.com ([fe80::f9e4:dba6:9571:928c%4]) with mapi id 15.20.3784.013; Fri, 22 Jan 2021 18:45:28 +0000
From: "Ehsan Hemmati (ehemmati)" <ehemmati@cisco.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang=40juniper.net@dmarc.ietf.org>, "pim@ietf.org" <pim@ietf.org>
Thread-Topic: [pim] pim wg adoption call for draft-chen-pim-srv6-p2mp-path-01
Thread-Index: AQHW6FORWxOgFkA030iipWrz7t+yb6oy8kwAgADQR4CAAEo7AA==
Date: Fri, 22 Jan 2021 18:45:28 +0000
Message-ID: <17FAA914-9A14-41CB-9F3A-875B55B70D7D@cisco.com>
References: <CAHANBtLs2F+x9ny8Jv=qe-28dFubcQL=k8bYXO4sybBr_Zpe5Q@mail.gmail.com> <2b772244b5ff4c2599aa59b37842e02c@huawei.com> <BYAPR05MB5974438648D0850805423233D4A09@BYAPR05MB5974.namprd05.prod.outlook.com>
In-Reply-To: <BYAPR05MB5974438648D0850805423233D4A09@BYAPR05MB5974.namprd05.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-mailer: Apple Mail (2.3445.104.17)
authentication-results: dmarc.ietf.org; dkim=none (message not signed) header.d=none;dmarc.ietf.org; dmarc=none action=none header.from=cisco.com;
x-originating-ip: [70.120.145.18]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: a71a913a-cdbb-4c0d-5ca5-08d8bf05e3a2
x-ms-traffictypediagnostic: BYAPR11MB3704:
x-microsoft-antispam-prvs: <BYAPR11MB3704F20BA1C42C4710B8EE31D4A09@BYAPR11MB3704.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:9508;
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:BYAPR11MB2696.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(39860400002)(136003)(366004)(396003)(376002)(346002)(26005)(110136005)(8676002)(478600001)(33656002)(2906002)(54906003)(66556008)(316002)(66476007)(76116006)(186003)(64756008)(6506007)(66946007)(66446008)(5660300002)(71200400001)(966005)(53546011)(2616005)(6486002)(86362001)(36756003)(166002)(6512007)(66574015)(83380400001)(4326008)(8936002)(45980500001)(559001)(579004); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata: =?us-ascii?Q?HAJpoceSKa0HHsla4kW3w0KY+rn9uiIg8hZ5yau4iTwkqakBexBAb+GysRr6?= =?us-ascii?Q?8JNVI+e3Xt/1HM1GeiI+sOc1gPOEHNDuQgm84IGXCq7B+T7e6zpopGnzAzpw?= =?us-ascii?Q?d2/R+/TOuKuKk/ei8VkmxqMuQ9Ag3uewDJD67gelNZPmXEaU/OoPTxOnzZvP?= =?us-ascii?Q?hxt3fg7iHSlViH9pda5zCl1cSEBPCFCtgDj5POsTVicbxs3PgPALqDnJL6/v?= =?us-ascii?Q?OtC7vDlxmpr/yWE9deUYbKiSaoByaAZzAvl1xOJNrcd2BTz+XkS/+1dyc9qj?= =?us-ascii?Q?gg+mogfdtntbM7gQfuLSC/nUaR66+0pYFT+AoLtvPL6NSFMkiGF02wiW6dnu?= =?us-ascii?Q?yYXR9Ftc64oFoXl85TRvkvXlJ17FThzQ3VvitNH8PdMM1Petc9O3JJVkhC7j?= =?us-ascii?Q?llvU+dkWNlfuxlzfMssQXZUttb5/v8KYit+K7+gfcfC//eaU6zuDU0RIlyMY?= =?us-ascii?Q?ufoow+p94XV3swByRk/NHyDPa0jS3wj69kNwJaFD7HtP3eI+UzxINdfvyZvB?= =?us-ascii?Q?TlsTw4mot/+sXoulOZuiwDCduLKIVSxR85w+yYBYjpJtjc6uEK4NsYKr1KZv?= =?us-ascii?Q?p2z1C+8SHFAlCjV6tx8Wk44LS7Ohi1lxTdUHSRwpTvWPDIvc54mcMZT//S0Y?= =?us-ascii?Q?R6/lXurqLZaIL4ETzSQS7AOpZmFV7osHF7EPfl80nILE1aoFXJnYfh7TdksS?= =?us-ascii?Q?5C3GdNUiFNksRui12vDYMIzCDGjvN7sytGnz8NZESTJUaZ/z/k8ejJRXiOcm?= =?us-ascii?Q?8lCTagcSQX0Jy4ZoSADmK7z3Pz41vB3tdpMI3xezejq50obam01U7yEYCYCC?= =?us-ascii?Q?UpD3wRv3Ejz6WtRKXivhzun9y2RiXZp4OZKyo38QtZckP8n6i563v96D3voe?= =?us-ascii?Q?Rbqc390eiutfTnK6uGl9zP9xNa/uE8XKnuITiJb1Uks/mvhwFspN+eHWJk9K?= =?us-ascii?Q?lnjHEorICh27D7UpMJGxZ6k5+OuD/hbqpaOKDzxwQoBQrgL8EMIOLZuXoI1+?= =?us-ascii?Q?yvnb?=
x-ms-exchange-transport-forked: True
Content-Type: multipart/alternative; boundary="_000_17FAA9149A1441CB9F3A875B55B70D7Dciscocom_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: BYAPR11MB2696.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: a71a913a-cdbb-4c0d-5ca5-08d8bf05e3a2
X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Jan 2021 18:45:28.5856 (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: w/HUHvLWyjcnQEGKEI3o9CnYxhiT5V1X7YokD++n+krhCvPddqk9tjyjso8CPBMk+8aBw1+uc10oQ0u/MqO0Bw==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB3704
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.36.7.11, xch-aln-001.cisco.com
X-Outbound-Node: rcdn-core-7.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/pim/WBLsSutPDa92TrbZdl0P7XQBGOE>
Subject: Re: [pim] pim wg adoption call for draft-chen-pim-srv6-p2mp-path-01
X-BeenThere: pim@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Protocol Independent Multicast <pim.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/pim>, <mailto:pim-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/pim/>
List-Post: <mailto:pim@ietf.org>
List-Help: <mailto:pim-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/pim>, <mailto:pim-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 22 Jan 2021 18:45:35 -0000

I do agree with Jeffrey and Object to adoption for the same reason.

Ehsan

On Jan 22, 2021, at 6:19 AM, Jeffrey (Zhaohui) Zhang <zzhang=40juniper.net@dmarc.ietf.org<mailto:zzhang=40juniper.net@dmarc.ietf.org>> wrote:

With IR, you don't need any of the following:

1. encoding (sub-)tree in the packet
2. core routers supporting the new forwarding behavior (i.e. new ASIC)

I am less concerned with edge devices having to support new forwarding behavior because they typically are capable of doing that w/o new ASIC; but core routers are more difficult with that, so we need to be careful with solutions requiring new forwarding behavior.

You mentioned 10x replication with draft-chen. That's 10 leaves but you also need to encode replication points. As I mentioned in the other email, it's good to see a concrete illustration of the SRv6 header.

Back to my original comment - how does it compare to BIER-TE, and do we really need another solution that requires new  ASIC on core routers.

Jeffrey

-----Original Message-----
From: pim <pim-bounces@ietf.org<mailto:pim-bounces@ietf.org>> On Behalf Of Xiejingrong (Jingrong)
Sent: Thursday, January 21, 2021 8:54 PM
To: Stig Venaas <stig@venaas.com<mailto:stig@venaas.com>>; pim@ietf.org<mailto:pim@ietf.org>
Subject: Re: [pim] pim wg adoption call for draft-chen-pim-srv6-p2mp-path-01

[External Email. Be cautious of content]


Hi all,

I have read the document and the presentation slides.
I think it is a clear proposal to solve some clear problems of existing approaches.

Comparing to IR, this proposal can do a stateless replication (say 10x replication) in 1 packet, thus increase the scalability of IR to 10X.
It can be seen as an extension to IR (a 1x replication), and the cost to scale to 10x replication is very deterministic and smooth.
It can be combined with IR seamlessly.
For example, IR could support a stateless 100x replication from an Ingress router to 100 Egress routers.
Then, this proposal could support a stateless 1000x replication using the combination of IR * SR-P2MP.

Contrary to the concern of scalability, I think this proposal has a linear scalability improvement comparing to IR-only, and therefore I support the adoption of this document.

To authors, it may be useful to clarify the scope and add some text about scalability consideration in the document.

Regards,
Jingrong


-----Original Message-----
From: pim [mailto:pim-bounces@ietf.org] On Behalf Of Stig Venaas
Sent: Tuesday, January 12, 2021 3:54 AM
To: pim@ietf.org<mailto:pim@ietf.org>
Subject: [pim] pim wg adoption call for draft-chen-pim-srv6-p2mp-path-01

Hi all

We discussed the draft draft-chen-pim-srv6-p2mp-path-01 in the last wg meeting. We did do an adoption call in the meeting, but we also would like to get input on the mailing list.

Please respond by January 25th whether you believe this document should be adopted.
The document can be found at
https://urldefense.com/v3/__https://tools.ietf.org/html/draft-chen-pim-srv6-p2mp-path-01__;!!NEt6yMaO-gk!X-bfbdJ7YKP527XztGdWD_d7FiiEJ138T4nEbEwJB0s-KGZNWzndp6TBzStPkbf-$

Regards,
Stig

_______________________________________________
pim mailing list
pim@ietf.org<mailto:pim@ietf.org>
https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/pim__;!!NEt6yMaO-gk!X-bfbdJ7YKP527XztGdWD_d7FiiEJ138T4nEbEwJB0s-KGZNWzndp6TBzQoYlD8B$

_______________________________________________
pim mailing list
pim@ietf.org<mailto:pim@ietf.org>
https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/pim__;!!NEt6yMaO-gk!X-bfbdJ7YKP527XztGdWD_d7FiiEJ138T4nEbEwJB0s-KGZNWzndp6TBzQoYlD8B$

Juniper Business Use Only

_______________________________________________
pim mailing list
pim@ietf.org<mailto:pim@ietf.org>
https://www.ietf.org/mailman/listinfo/pim