[tsvwg] SCTP question

<philip.eardley@bt.com> Tue, 16 October 2018 14:42 UTC

Return-Path: <philip.eardley@bt.com>
X-Original-To: tsvwg@ietfa.amsl.com
Delivered-To: tsvwg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2D335130DE9 for <tsvwg@ietfa.amsl.com>; Tue, 16 Oct 2018 07:42:28 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.601
X-Spam-Level:
X-Spam-Status: No, score=-2.601 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=btgroupcloud.onmicrosoft.com
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 JrSi4Ye-vD4L for <tsvwg@ietfa.amsl.com>; Tue, 16 Oct 2018 07:42:20 -0700 (PDT)
Received: from smtpe1.intersmtp.com (smtpe1.intersmtp.com [62.239.224.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AD077130DC9 for <tsvwg@ietf.org>; Tue, 16 Oct 2018 07:42:19 -0700 (PDT)
Received: from tpw09926dag15h.domain1.systemhost.net (10.9.212.39) by RDW083A009ED65.bt.com (10.187.98.35) with Microsoft SMTP Server (TLS) id 14.3.408.0; Tue, 16 Oct 2018 15:41:59 +0100
Received: from tpw09926dag03h.domain1.systemhost.net (10.9.202.30) by tpw09926dag15h.domain1.systemhost.net (10.9.212.39) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Tue, 16 Oct 2018 15:42:16 +0100
Received: from RDW083A012ED68.bt.com (10.187.98.38) by tpw09926dag03h.domain1.systemhost.net (10.9.202.30) with Microsoft SMTP Server (TLS) id 15.0.1293.2 via Frontend Transport; Tue, 16 Oct 2018 15:42:16 +0100
Received: from GBR01-LO2-obe.outbound.protection.outlook.com (23.103.134.179) by smtpe1.intersmtp.com (62.239.224.234) with Microsoft SMTP Server (TLS) id 14.3.408.0; Tue, 16 Oct 2018 15:41:16 +0100
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=BTGroupCloud.onmicrosoft.com; s=selector1-bt-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=iQdm/2G9H0oab0BILifbrrMNq2CmPTzehB3I6JnXc5w=; b=5kSMAOpaW1tc+xoDlmr3QopZ1AaEPASujuEQ4aPJcWggcMHlgLTMFM7CM6I4lTaH156QxMdDWwKRWOugMqFlIKN+WcWyZB5E0o1nbGzTid19kBAf8jXEBYjUcIpletHf8pn8DGGsMlX/maEY3M8HIWT5kK2pSFpTjctdTOYulzQ=
Received: from LOXP123MB0805.GBRP123.PROD.OUTLOOK.COM (10.166.250.17) by LOXP123MB1047.GBRP123.PROD.OUTLOOK.COM (10.166.251.150) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1228.25; Tue, 16 Oct 2018 14:42:05 +0000
Received: from LOXP123MB0805.GBRP123.PROD.OUTLOOK.COM ([fe80::f9a4:c705:e1f3:cc4b]) by LOXP123MB0805.GBRP123.PROD.OUTLOOK.COM ([fe80::f9a4:c705:e1f3:cc4b%5]) with mapi id 15.20.1228.027; Tue, 16 Oct 2018 14:42:05 +0000
From: philip.eardley@bt.com
To: tsvwg@ietf.org, perry.wilks@bt.com
Thread-Topic: SCTP question
Thread-Index: AdRlXIaYnYmti2juQ3WjfuYSa9RVhg==
Date: Tue, 16 Oct 2018 14:42:05 +0000
Message-ID: <LOXP123MB08050FABE8A17B6BF1F7E64EEBFE0@LOXP123MB0805.GBRP123.PROD.OUTLOOK.COM>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: spf=none (sender IP is ) smtp.mailfrom=philip.eardley@bt.com;
x-originating-ip: [193.113.37.9]
x-ms-publictraffictype: Email
x-microsoft-exchange-diagnostics: 1; LOXP123MB1047; 6:E9mP5kywi9JrngotKPde0uPagg1ieReOpgj5IELgWSK7SLBrO22GX0i3lO7VNyN6P98foDwr4XY4Bx60IshnoObp6amhPLNUv78di5vjZgBQZy9+BzHECGv4ZzHWJqeCGq4xOkw0EK0BDvJuVCr88LoRVga5TL/dnagD/WXNxwSO8hMZrx6oB2QFjNuwXg+qsjP5Q3vW16Si/jId61WtTp3BqNDrT0Kz+VxiYrUyD+vMObREbYACVesVL676dqbCCf0T8DMAeLKrvMwnVTGogEdf2Gh8rsm4ZuxzTckkhQg4Z0VYVMf6s/Og32CvORsZZk3bERXmK2wV/du/yRbYPwLy6GyXc0ya/wbQVgk8WXOLvLCnqZVR0ryIVTxYguyzqctmjCdXic9KX8Y6Gln7z4DMxPH1GHBXyn2g3o6x+gDKwjPiK85AFlIDW+igdt5G93ziUJ8G6o7kLlT+ciT++Q==; 5:+9I1VCpWY2yZfaHX8Qvu8QBbLUze3H1J2sLrvUbT9NScCQTdo1SJzdqKNr5HV0MS6ozkW9aFrVrayqypMR8R+CPJNXuX82UDtEc5EuEFU3Ez5GDW1umvr8NSqZ2cuvsADeLT5jvThOHooX5tqVL/ST1M6tSoB/8r3R0heACLyq0=; 7:LLcA/08Gg2uES6DufYaUJaWyPVYqLU16cgls684aTBZ+rlwANZdcbRjze9PzKiL13J2DnB07GMcz9rFQETovbWJrIkAKum4zlPEevPQxfRmlScqVWlCOzBPhrTn8k4HUbuPI0OtdtpsUNQnqc1aBgXA2o7XGhaTkGoP/4yM6UQYSqXLW2VEjWr8gwDNr2sBMSlt1zDJW8Qjkvy6BhAWrVOmYS/PWMeZfjnBZtMJm6Q8spKEpEGFn8/fOx5FebEZr
x-ms-exchange-antispam-srfa-diagnostics: SOS;SOR;
x-ms-office365-filtering-correlation-id: 97cdc30d-fd88-4e45-3581-08d633758b0d
x-microsoft-antispam: BCL:0; PCL:0; RULEID:(7020095)(4652040)(8989299)(5600074)(711020)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7153060)(7193020); SRVR:LOXP123MB1047;
x-ms-traffictypediagnostic: LOXP123MB1047:
x-antispam-2: 1
x-microsoft-antispam-prvs: <LOXP123MB1047072459C8D6DA19B6F7E8EBFE0@LOXP123MB1047.GBRP123.PROD.OUTLOOK.COM>
x-exchange-antispam-report-test: UriScan:(21748063052155)(28532068793085)(190501279198761)(227612066756510);
x-ms-exchange-senderadcheck: 1
x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(8211001083)(6040522)(2401047)(8121501046)(5005006)(3002001)(3231355)(944501410)(52105095)(10201501046)(93006095)(93001095)(149066)(150057)(6041310)(20161123560045)(20161123558120)(20161123562045)(20161123564045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(201708071742011)(7699051); SRVR:LOXP123MB1047; BCL:0; PCL:0; RULEID:; SRVR:LOXP123MB1047;
x-forefront-prvs: 0827D7ACB9
x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(366004)(346002)(396003)(136003)(376002)(39860400002)(199004)(189003)(221733001)(110136005)(2501003)(5250100002)(316002)(186003)(256004)(478600001)(33656002)(14454004)(25786009)(26005)(66066001)(486006)(476003)(6436002)(6506007)(97736004)(2900100001)(790700001)(68736007)(9686003)(6306002)(54896002)(3846002)(8936002)(3480700004)(81156014)(81166006)(8676002)(2906002)(71190400001)(71200400001)(6116002)(53936002)(102836004)(99286004)(5660300001)(7116003)(7736002)(86362001)(106356001)(55016002)(6636002)(74316002)(7696005)(105586002); DIR:OUT; SFP:1101; SCL:1; SRVR:LOXP123MB1047; H:LOXP123MB0805.GBRP123.PROD.OUTLOOK.COM; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1;
received-spf: None (protection.outlook.com: bt.com does not designate permitted sender hosts)
x-microsoft-antispam-message-info: oRvScVxzVQOzw2qz88GgKbBFr1KmainsXlR/H7iHWitJuHLMYAT8Gkpe6WR8xf+7OmH9m8mwH+iQ4PQhuPsOcveDZ+mN0cbnG7qF9OdFpCY/o0dPSoNIsCGU9ZkQ8KvEMLlGApDnprA0u6u/OASBnWdVZ+Ub+n7vPPG4RyzBFuFS+puG5cVKzX6AKR3CYw87oZ0gByMq/LcqUQRVL5R/09JfuFfV6ip5ogd5CsUFmJHaGmGd0ai8RaGP2qd40BtCyr8D/LHb3xLSUVTs41p16UPFQKOiFSyxLEvGxjCInInyNxiCMDeRwV6dwvpZ1mWDNrIWMSWw7AJzuRb7MjQQD9jvo9KcIxDDLKpoK47IkO0=
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: multipart/alternative; boundary="_000_LOXP123MB08050FABE8A17B6BF1F7E64EEBFE0LOXP123MB0805GBRP_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 97cdc30d-fd88-4e45-3581-08d633758b0d
X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Oct 2018 14:42:05.5121 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: a7f35688-9c00-4d5e-ba41-29f146377ab0
X-MS-Exchange-Transport-CrossTenantHeadersStamped: LOXP123MB1047
X-OriginatorOrg: bt.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/dcXBA1q_e27yCdX5fuwRemFVwrc>
Subject: [tsvwg] SCTP question
X-BeenThere: tsvwg@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Transport Area Working Group <tsvwg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tsvwg>, <mailto:tsvwg-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tsvwg/>
List-Post: <mailto:tsvwg@ietf.org>
List-Help: <mailto:tsvwg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tsvwg>, <mailto:tsvwg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 16 Oct 2018 14:42:28 -0000

A colleague of mine, Perry, has a couple of questions about SCTP RFC4960. He's in the BT design team on Signalling protocols and concerned about conformance testing amongst other issues.

The statement is on page 57 of RFC4960  (section on Association initialisation) "Note: T1-init timer and T1-cookie timer shall follow the same rules given in Section 6.3."
The question is: how should the "shall" be interpreted in this sentence? Does it mean that the S6.3 rules MUST be followed? Or does it mean that the S6.3 rules are optional - in which case, are there any thoughts about rules other than those in S6.3?

Thanks,
Best wishes,
Philip Eardley
Research and Innovation
This email contains BT information, which may be privileged or confidential. It's meant only for the individual(s) or entity named above. If you're not the intended recipient, note that disclosing, copying, distributing or using this information is prohibited. If you've received this email in error, please let me know immediately on the email address above. Thank you.
We monitor our email system, and may record your emails.
British Telecommunications plc
Registered office: 81 Newgate Street London EC1A 7AJ
Registered in England no: 1800000