[Idr] Re: Shepherd's report for draft-ietf-idr-bgp-ls-sr-policy-08 - Resending

John Scudder <jgs@juniper.net> Fri, 06 December 2024 13:38 UTC

Return-Path: <jgs@juniper.net>
X-Original-To: idr@ietfa.amsl.com
Delivered-To: idr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3A7ECC1840CF for <idr@ietfa.amsl.com>; Fri, 6 Dec 2024 05:38:42 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.149
X-Spam-Level:
X-Spam-Status: No, score=-2.149 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.148, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, HTTPS_HTTP_MISMATCH=0.1, RCVD_IN_DNSWL_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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="EOe2o+UX"; dkim=neutral reason="invalid (public key: not available)" header.d=juniper.net header.b="j/RP6yoW"
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 lGzYd44HJC0f for <idr@ietfa.amsl.com>; Fri, 6 Dec 2024 05:38:38 -0800 (PST)
Received: from mx0a-00273201.pphosted.com (mx0a-00273201.pphosted.com [208.84.65.16]) by ietfa.amsl.com (Postfix) with ESMTP id C292DC180B65 for <idr@ietf.org>; Fri, 6 Dec 2024 05:38:38 -0800 (PST)
Received: from pps.filterd (m0108159.ppops.net [127.0.0.1]) by mx0a-00273201.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4B69a2BU023457; Fri, 6 Dec 2024 05:38:37 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juniper.net; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=PPS1017; bh=hZEn01UpJDZj3p2jF+R44m8twr eUxWNeED2BciMtlp8=; b=EOe2o+UXmPpS/OSy5V27zi6sFHeDW/clUGpiNNgpKX sFqwj/U9N/FrGR3aB9Z+z0D1TNg2b7Mo+/cENmGOV7Y9vZE8p5tfOrlxIyjwmbbQ C/lNuyeQUB+m5yLqwZQMp9PlPGUBfA2LIh3tQwOglGIsYoA3nx6apyR+gnPnBNkS O3/6Kd/XchKVe0yWI7gOBfncFgHmQoFcPqw9rE9BpDDi7Ftv9ZGQ5Ci9FtA2+oDu cUVcFSTm3MPHqXDORPhMlYuIi/tAcliTjjSkvyNCmmwMK2ev4GGzaAXcVIl1Azmh JZYVLhemEeU3zZFDXPiZUMBcMqRAdqcq65KQUxcBiPDA==
Received: from cy4pr02cu008.outbound.protection.outlook.com (mail-westcentralusazlp17011030.outbound.protection.outlook.com [40.93.6.30]) by mx0a-00273201.pphosted.com (PPS) with ESMTPS id 43ars4w837-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 06 Dec 2024 05:38:37 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=VRnZzzeCbdEiMsD0hpUP6/UdlfzZe04zUJgCg62LTF6iuSlLY/+44Vef73aL8cWjfDpA9a5Vuptd10PxtyoT6Grfsbg2zlXv3ky98NEthU/V18zPmbPqprkRODjlEq5HDm1VYEe/UDjHZGP+jK/qlRVDskl6Vj0WrLBpcz7eFDU2PF4MRrZUtryS6+LCbgUBOm3+Tv/LGwkByXoMZKc6zFkKwKUAP2cAh+iksMNho3SnU+LlQkax2N77uWNjsf25IK9Sa89FL5/WG5bOFlYpCGi3N2G05ij0Jkm3xZXtjVOyZHO8ByD/1IgTMY6lRsHss48DxTQtkOsXM9MFdzFRDQ==
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=hZEn01UpJDZj3p2jF+R44m8twreUxWNeED2BciMtlp8=; b=esm7CD2D/0e73p31p8G+s/UP/ylaqbbdwCHdG4dhIyZfiwDFI1xXhwXfm3y1JqIeoAsDLuItxTmW/huKYu2y5oDqsnmyE5NJzG8Z0Sofyg8bGXllgYUbbuEhrFJh0r9U63yqCsOFlQ+PEsIksa7umqwilOnY0sccmMP3IR48TSqulYid74kwhIj8vzRo+sm2Rsvc8Dv0S9RqwCiUySTVe+mqPwD2bjNNqbSI7+KZ+/iIVDmm7S3wS6Gt4+0JbgRB60tmwYkLXPAOOakGeIjtbatdmIEF9vHkSDrZflYk36hG3qGj2cpR60aKwOTXKRJJe+RLXAu2J8bm8+HDjOOElw==
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=hZEn01UpJDZj3p2jF+R44m8twreUxWNeED2BciMtlp8=; b=j/RP6yoWR59sd6FxSUEtwyK0OgKQHpIEfef8tqq58RDWx50zNZhLDw2toKcbcF4ViOTM9sqxiha0Q+9/Bu2yxHtRi9vfQITe0mHeDeKnqdmFJtZQ/Ewx72PGbWIFObeLi/kLul2+rK5ctuSsk06zKAPSmI0iplnU7GdjlGSeSPE=
Received: from LV8PR05MB10374.namprd05.prod.outlook.com (2603:10b6:408:184::11) by SJ0PR05MB9885.namprd05.prod.outlook.com (2603:10b6:a03:4ee::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8207.17; Fri, 6 Dec 2024 13:38:32 +0000
Received: from LV8PR05MB10374.namprd05.prod.outlook.com ([fe80::5611:fbeb:b227:6aa9]) by LV8PR05MB10374.namprd05.prod.outlook.com ([fe80::5611:fbeb:b227:6aa9%3]) with mapi id 15.20.8207.020; Fri, 6 Dec 2024 13:38:32 +0000
From: John Scudder <jgs@juniper.net>
To: Susan Hares <shares@ndzh.com>
Thread-Topic: Shepherd's report for draft-ietf-idr-bgp-ls-sr-policy-08 - Resending
Thread-Index: AQHbR9R/zoUgM2KO2k2ljL9zyMCZIbLZOJ57
Date: Fri, 06 Dec 2024 13:38:32 +0000
Message-ID: <D78F00B1-B570-46CD-82A2-3A198248245C@juniper.net>
References: <CO1PR08MB66110363224DFA59CCE43B23B3232@CO1PR08MB6611.namprd08.prod.outlook.com> <CO1PR08MB6611F648A92C3CC6B9CB7B1EB3232@CO1PR08MB6611.namprd08.prod.outlook.com> <CO1PR08MB6611984CA7CEEBB35682D264B3312@CO1PR08MB6611.namprd08.prod.outlook.com>
In-Reply-To: <CO1PR08MB6611984CA7CEEBB35682D264B3312@CO1PR08MB6611.namprd08.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: LV8PR05MB10374:EE_|SJ0PR05MB9885:EE_
x-ms-office365-filtering-correlation-id: e2ab7b24-1eac-4ade-75a9-08dd15fb46ad
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;ARA:13230040|366016|1800799024|376014|38070700018|7053199007|8096899003;
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:LV8PR05MB10374.namprd05.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014)(38070700018)(7053199007)(8096899003);DIR:OUT;SFP:1102;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: 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
Content-Type: multipart/alternative; boundary="_000_D78F00B1B57046CD82A23A198248245Cjunipernet_"
MIME-Version: 1.0
X-OriginatorOrg: juniper.net
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: LV8PR05MB10374.namprd05.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: e2ab7b24-1eac-4ade-75a9-08dd15fb46ad
X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Dec 2024 13:38:32.2667 (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: Po2gcKGbR6EAeBj0ZJrOsIVy0S2EyArSF9cQfYikOQSWzrt6qhdOtECV1kASFH94
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR05MB9885
X-Proofpoint-GUID: VpxKhNX2gfAvLO07bajcUFh96aQz_jEk
X-Proofpoint-ORIG-GUID: VpxKhNX2gfAvLO07bajcUFh96aQz_jEk
X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01
X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 phishscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412060102
Message-ID-Hash: 4T3KUIKHEFI3527DHEZJBGVRARGLKDUP
X-Message-ID-Hash: 4T3KUIKHEFI3527DHEZJBGVRARGLKDUP
X-MailFrom: jgs@juniper.net
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
CC: "idr@ietf.org" <idr@ietf.org>
X-Mailman-Version: 3.3.9rc6
Precedence: list
Subject: [Idr] Re: Shepherd's report for draft-ietf-idr-bgp-ls-sr-policy-08 - Resending
List-Id: Inter-Domain Routing <idr.ietf.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/bje6-B888d6Eykk7Q7IJ-GMM7wA>
List-Archive: <https://mailarchive.ietf.org/arch/browse/idr>
List-Help: <mailto:idr-request@ietf.org?subject=help>
List-Owner: <mailto:idr-owner@ietf.org>
List-Post: <mailto:idr@ietf.org>
List-Subscribe: <mailto:idr-join@ietf.org>
List-Unsubscribe: <mailto:idr-leave@ietf.org>

Hi, Sue and all,

Based on the summary Sue linked, I think that sounds reasonable. In the unlikely event that I were to change my mind after digging into the background, there is still plenty of opportunity for more discussion, so I say go ahead and send it.

Thanks for checking,

—John

On Dec 6, 2024, at 6:46 AM, Susan Hares <shares@ndzh.com> wrote:



[External Email. Be cautious of content]

John:

Would you please review my resolution of Shepherd issues 15, 18, and 30?
Please see:

https://wiki.ietf.org/group/idr/Shepherd-SR-BGP-LS/BGP-LS-SR/bgp-ls-sr-policy<https://urldefense.com/v3/__https://wiki.ietf.org/group/idr/Shepherd-SR-BGP-LS/BGP-LS-SR/bgp-ls-sr-policy__;!!NEt6yMaO-gk!DwnYb059EN6R-PYEM2b9y_jLOPpGuxnreLL8gSdjcDnMcHRUQgc6-cr3FPnM-11z4RVeEbxzcHQ$>

We will forward the document to the IESG for publication if you agree.

Sue


From: Susan Hares
Sent: Friday, November 22, 2024 9:34 AM
To: John Scudder <jgs@juniper.net>
Subject: FW: Shepherd's report for draft-ietf-idr-bgp-ls-sr-policy-08

John:

Could you look at the resolution of the issues 15, 18, and 30 described below?
I am inclined to accept Ketan’s view that his text is sufficient.

I want to check with you.  Could you respond to the post with your viewpoint?

Thank you!

Cheers, Sue

From: Susan Hares
Sent: Friday, November 22, 2024 9:12 AM
To: idr@ietf.org<mailto:idr@ietf.org>
Cc: John Scudder <jgs@juniper.net<mailto:jgs@juniper.net>>
Subject: Shepherd's report for draft-ietf-idr-bgp-ls-sr-policy-08

Ketan:

Thank you for hard work to resolve the shepherd’s comments from
draft-ietf-idr-bgp-ls-sr-policy-05 in draft-ietf-idr-bgp-ls-sr-policy-08.
(https://mailarchive.ietf.org/arch/msg/idr/DLfvkhT7HOClFSfUzFNQ9z8bSFc/<https://urldefense.com/v3/__https://mailarchive.ietf.org/arch/msg/idr/DLfvkhT7HOClFSfUzFNQ9z8bSFc/__;!!NEt6yMaO-gk!DwnYb059EN6R-PYEM2b9y_jLOPpGuxnreLL8gSdjcDnMcHRUQgc6-cr3FPnM-11z4RVeev_F6cQ$>)

You have resolved the shepherd’s points except issues 15, 18, and 30.
On issues 15, 18, and 30, your responses indicate why you
believe your text is correct for these issues.

My resolution to these issues is to send a note to IDR’s WG’s AD (John Scudder)
to confirm that your resolution is acceptable to him.

Cheers Sue


=====================
Issue 15:  Section 5.6.5 - Length range,
Current text: / * Length: Variable.  Minimum of 8 octets./

Shepherd’s comments: The maximum is the amount that fits in the packet minutes the headers.
Ketan’s point:  BGP-LS has a common concept that a maximum is what fits in the packet.  An addition here would be confusing.

Both issue 18 and 30
Issue-18: Section 5.6.6, Metric-Type

Are all other values except the values in section 8.6 invalid?
Here's the problem:
Values 1-5 - are tested with the details recorded in the implementation report.
Values 6-120 – are unassigned and not tested.
Values 121-127 -  are outside the scope of the draft.
Values 128-255 -  are user defined and outside the scope of this

Ketan feels that the IANA assignment provides enough information to the
Implementer.

Issue-30: Section 5.9 Metric-Type

Are all other values except the values in section 8.6 invalid?

Here's the problem:
Values 1-5 - are tested and recored
Values 6-120 - are outside the scope of this document.
Values 121-127 - are outside thescope of this document.
Values 128-255 - are user defined.

Ketan feels that the IANA assignment provides enough information to the
Implementer.