Re: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-pd-relay-requirements-02.txt

"Bernie Volz (volz)" <volz@cisco.com> Wed, 07 October 2020 19:08 UTC

Return-Path: <volz@cisco.com>
X-Original-To: dhcwg@ietfa.amsl.com
Delivered-To: dhcwg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A4C4D3A1313 for <dhcwg@ietfa.amsl.com>; Wed, 7 Oct 2020 12:08:36 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.598
X-Spam-Level:
X-Spam-Status: No, score=-9.598 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, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-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=O1BQWGBx; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=TnkGymdO
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 QU5zzlLBWikX for <dhcwg@ietfa.amsl.com>; Wed, 7 Oct 2020 12:08:34 -0700 (PDT)
Received: from alln-iport-7.cisco.com (alln-iport-7.cisco.com [173.37.142.94]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8B7D53A1311 for <dhcwg@ietf.org>; Wed, 7 Oct 2020 12:08:34 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3860; q=dns/txt; s=iport; t=1602097714; x=1603307314; h=from:to:subject:date:message-id:references:in-reply-to: content-transfer-encoding:mime-version; bh=2CGYZyyttghb5VNb2mQq8TB5LdFBxmUNJ8YvHJgjpSY=; b=O1BQWGBxDj+c6ssxFdAySlWea3F0dstmnskeeGBO/2o82sYyORXtrRuz mYXnKDL4OuCHj8PIRJB4/C+l7YpuMABiuhsm2tikt2G6APGaXpOXkWXQh 2+1VqAEZIbKv11GrbdaeAhbzt+vh9VIjZEf9umsvarLnmjywVW46Cu8fa I=;
IronPort-PHdr: =?us-ascii?q?9a23=3AFP/2MRxpadBDatHXCy+N+z0EezQntrPoPwUc9p?= =?us-ascii?q?sgjfdUf7+++4j5ZRWHt/ponBnCWoCIo/5Hiu+DtafmVCRA5Juaq3kNfdRKUA?= =?us-ascii?q?NNksQZmQEsQavnQU32JfLndWo2ScJFUlI28HSrd0NSHZW2a1jbuHbn6zkUF1?= =?us-ascii?q?32PhZ0IeKgHInUgoy32um+9oeVbR9PgW+2YKh5K1O9qgCCuw=3D=3D?=
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0CkCQBvEX5f/5RdJa1ggQmDIVEHgUk?= =?us-ascii?q?vLAqEM4NGA411mHuBQoERA1ULAQEBDQEBLQIEAQGESgIXgXACJTgTAgMBAQs?= =?us-ascii?q?BAQUBAQECAQYEbYVcDIVyAQEBAQMSEREMAQE4CwQCAQgRBAEBAwImAgICMBU?= =?us-ascii?q?ICAIEARIIGoVQAy4BnloCgTmIYXaBMoMBAQEFhSIYghAJgQ4qgnKDa4JEhBI?= =?us-ascii?q?bggCBEUOCTT6CGoIJHIMVM4Itk0OTBZEUCoJomwmDE4oElBaTGoF6niECBAI?= =?us-ascii?q?EBQIOAQEFgWsjKoEtcBWDJFAXAg2SEIpWdDcCBgEJAQEDCXyMOwGBEAEB?=
X-IronPort-AV: E=Sophos;i="5.77,348,1596499200"; d="scan'208";a="556725843"
Received: from rcdn-core-12.cisco.com ([173.37.93.148]) by alln-iport-7.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 07 Oct 2020 19:08:33 +0000
Received: from XCH-ALN-001.cisco.com (xch-aln-001.cisco.com [173.36.7.11]) by rcdn-core-12.cisco.com (8.15.2/8.15.2) with ESMTPS id 097J8XTr022451 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=FAIL); Wed, 7 Oct 2020 19:08:33 GMT
Received: from xhs-aln-001.cisco.com (173.37.135.118) by XCH-ALN-001.cisco.com (173.36.7.11) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 7 Oct 2020 14:08:33 -0500
Received: from xhs-rcd-002.cisco.com (173.37.227.247) by xhs-aln-001.cisco.com (173.37.135.118) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 7 Oct 2020 14:08:32 -0500
Received: from NAM04-BN3-obe.outbound.protection.outlook.com (72.163.14.9) by xhs-rcd-002.cisco.com (173.37.227.247) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Wed, 7 Oct 2020 14:08:32 -0500
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=AZVXKW7f99NErdLe/kpgvgMAXI26VTHfTu17yhUEDakQV+DvePhERLyYQJzEx67PrjL09V51cGk96W+W/1Eegsrw84/AD84k4AH7DvEI/cfZuPcXZq5iztO+Zc4aTL+EXYN+/K+7UrZ4vnFVZTqhXRJV0LxV4tuuqkieNa21htwsbk+nhJN7E9oLiFc9ce+7tUud25IKZeylRF1ytH7VoFy17yw6BM1BJslky7L5s4rN/0kBZaWtdMUuBWzpM8HRP6ia3X7SOMbqi2wvix2IjTpgve/EV3jZZcwdCv8g1/H8IOw8CJGozW5bzgo+gtum50ThLLFKL7BKAsJ9zmqXZQ==
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=2CGYZyyttghb5VNb2mQq8TB5LdFBxmUNJ8YvHJgjpSY=; b=M2uxvU5hW84+sfNssknZC+DDZjhL9Xb8QORcpdkDojND31pCef7vhtibWxU6Wgy/EqvQSZB4j/iJwVI9WzbkrGc10m50Eoidt6PR7WSHNTkeF/jpgJBaQiwxYq0M411oqeoKKFrz8RrsLQfGyZErzxm1RRU+5ixDem0eghlO3uJGmiOYufKnNHIB2caNCRT40lY++N+SMy1dsL3XV6E1dH+a9dAsZX+s2wdMvmzJrY2k6Jn5ovCqdNeAP5RHySEIUZgPdDAAXZE0dHytxDdFROnbmEe0rpiB+v4zQmUhqPqZM4xV5ADk7jd5aiw2GBj/sKxa9Hn1v7ULqFGvqljYPQ==
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=2CGYZyyttghb5VNb2mQq8TB5LdFBxmUNJ8YvHJgjpSY=; b=TnkGymdOu9j7MEpJs2tm5eN0wcdgV4gscv65LkzPA2FZ+ZMC4FJZp8g7462enkpAs49o0VQuJXN7+NGMnSwyrjZQF216Oq1JmrjFfbmQiDgzShK2z3ZTFa/ljnkSrvD6cRRqhtqBVz1eW0QXmz+iO1wfj60LJxRFcndmMdXHKKQ=
Received: from BYAPR11MB2549.namprd11.prod.outlook.com (2603:10b6:a02:c4::33) by BYAPR11MB2648.namprd11.prod.outlook.com (2603:10b6:a02:c7::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3433.38; Wed, 7 Oct 2020 19:08:29 +0000
Received: from BYAPR11MB2549.namprd11.prod.outlook.com ([fe80::2cd2:d609:5fb7:4d27]) by BYAPR11MB2549.namprd11.prod.outlook.com ([fe80::2cd2:d609:5fb7:4d27%5]) with mapi id 15.20.3455.023; Wed, 7 Oct 2020 19:08:29 +0000
From: "Bernie Volz (volz)" <volz@cisco.com>
To: "ianfarrer@gmx.com" <ianfarrer@gmx.com>, dhcwg <dhcwg@ietf.org>
Thread-Topic: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-pd-relay-requirements-02.txt
Thread-Index: AQHWnJQ0ACfgZh95tUCC+YwBcNJANqmMfBFw
Date: Wed, 7 Oct 2020 19:08:29 +0000
Message-ID: <BYAPR11MB254950BDC4AAC52BAB8F0C83CF0A0@BYAPR11MB2549.namprd11.prod.outlook.com>
References: <160206597879.10765.16093538868178381762@ietfa.amsl.com> <7DA789F6-8C44-4DC9-A9D3-6DFE6D4F4A0E@gmx.com>
In-Reply-To: <7DA789F6-8C44-4DC9-A9D3-6DFE6D4F4A0E@gmx.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: gmx.com; dkim=none (message not signed) header.d=none;gmx.com; dmarc=none action=none header.from=cisco.com;
x-originating-ip: [173.38.117.85]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 9701b687-b00d-4f17-8878-08d86af46072
x-ms-traffictypediagnostic: BYAPR11MB2648:
x-microsoft-antispam-prvs: <BYAPR11MB2648D76A816CEA41FFD133E2CF0A0@BYAPR11MB2648.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:8882;
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 1KWDMJKy/ah5VAHS9KwMJp/Nze6ZKsx/clb27H8PR2VMAHDMtJnm0kxDfvAgT+l4Wc8jASKDoMsJHAIp8of6RiV9TsoYg/o5Xsy2prfntpMhNRkCZzXg8tYt6ddsHke+SXSKgHs/xJvVszP3wX1fvaf7HeJPebT4USnuUnTS9VGzBCXcRZFqg156QSRBvfgVNHA089WIpD65bMqjETi5gF4oZWfsEO6x1AxOTnHYWH5aBOkM1EJd5iJxR75Efqg25bH9RGj/LM3D9pXQOcW/Bic9V+z3rRSfFjhkQYcWdY811DaCd3wY2xtq2Ng3JJhQL1Cop6wsTfr3QLTI3rbqr/Q6NJefyPwJ6it9Wy7lTiW9+HKTUaeBeM1zbaRYNDvl
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:BYAPR11MB2549.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(396003)(366004)(39860400002)(136003)(376002)(346002)(86362001)(66446008)(316002)(7696005)(76116006)(66574015)(71200400001)(478600001)(186003)(6506007)(26005)(83380400001)(53546011)(110136005)(66476007)(8936002)(64756008)(8676002)(66556008)(52536014)(55016002)(5660300002)(9686003)(66946007)(2906002)(33656002)(518174003); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata: 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
x-ms-exchange-transport-forked: True
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: BYAPR11MB2549.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 9701b687-b00d-4f17-8878-08d86af46072
X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Oct 2020 19:08:29.4029 (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: uRhNYFwi5dIOvFeqLdq2kRn/CiqDzfXoYdSsXCEfOCITvx8tQG+WZiePGu4Gxxb6
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB2648
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.36.7.11, xch-aln-001.cisco.com
X-Outbound-Node: rcdn-core-12.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/dhcwg/aNpGkGIZXIkv5Yc9-WaG3zfkidg>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-pd-relay-requirements-02.txt
X-BeenThere: dhcwg@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <dhcwg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dhcwg/>
List-Post: <mailto:dhcwg@ietf.org>
List-Help: <mailto:dhcwg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 07 Oct 2020 19:08:37 -0000

Hi:

Thanks Ian for the updates.

I suggest we wait a few days to see if v6ops or ipv6 working groups have any comments (as your emailed them) before I proceed with sending the document on.


In reviewing, I also noticed the following minor items:

Minor nit in section 1?

   Multi-hop DHCPv6 relaying is not affected, as the requirements in
   this document are solely applicable to the DHCP relay agent co-
   located with the first-hop router that the DHCPv6 client requesting
   the prefix is connected to, no changes to any subsequent relays in
   the path are needed.

Would "so no changes" (or thus no changes) be appropriate? It just seems something is missing here. Though two free grammar checkers I used didn't seem to flag it broken (either with or without my changes).

And, in section 3.5:

   If the client loses information about a prefix that it is delegated
   while the lease entry and associated route is still active in the
   delegating relay, then the relay will forward traffic to the client
   which the client will return to the relay (which is the client's
   default gateway (learnt via an RA).  The loop will continue until
   either the client is successfully reprovisioned via DHCP, or the
   lease ages out in the relay.

Missing a second closing parenthesis: (which is the client's default gateway (learnt via an RA)). 

Please do not publish an 03 for now as these issues are very minor. We can see if other comments are raised.

- Bernie

-----Original Message-----
From: dhcwg <dhcwg-bounces@ietf.org> On Behalf Of ianfarrer@gmx.com
Sent: Wednesday, October 7, 2020 6:25 AM
To: dhcwg <dhcwg@ietf.org>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-pd-relay-requirements-02.txt

Hi

We’ve just posted an update to this draft based on the comments received in WGLC. Many thanks for your reviews and suggestions.

The major changes since -01 are:

1. Rewritten abstract section
2. Provided clarification on multi-hop relays
3. Changed text related to handling of unknown messages by relays and removed req. G-2 that covered this.
4. Provided references to sections in CMTS and BNG documents
5. Added section about forwarding loops between clients and relays
6. Updated requirement R-4 to detail on avoiding the loops

I think that all of the WGLC comments are now addressed, with the exception of a question from Ole regarding implementors experience related to requirement R-4. I’ve just sent out a question on v6ops and 6man to see if we can get feedback on this.

One final question. The draft is currently called "DHCPv6 Prefix Delegating Relay” which is not particularly descriptive. We suggest changing it to ‘Requirements for DHCPv6 Prefix Delegating Relays’. Any objections to this?

Thanks,
Ian