Return-Path: X-Original-To: sipcore@mail2.ietf.org Delivered-To: sipcore@mail2.ietf.org Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id 359CC4C80C42 for ; Mon, 28 Jul 2025 20:26:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at ietf.org X-Spam-Flag: NO X-Spam-Score: -1.881 X-Spam-Level: X-Spam-Status: No, score=-1.881 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.017, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: mail2.ietf.org (amavisd-new); dkim=pass (2048-bit key) header.d=comcastmailservice.net Received: from mail2.ietf.org ([166.84.6.31]) by localhost (mail2.ietf.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dAEubjLBwpiW for ; Mon, 28 Jul 2025 20:26:37 -0700 (PDT) Received: from resdmta-h2p-564583.sys.comcast.net (resdmta-h2p-564583.sys.comcast.net [IPv6:2001:558:fd02:2446::d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail2.ietf.org (Postfix) with ESMTPS id 92BB74C80C3A for ; Mon, 28 Jul 2025 20:26:37 -0700 (PDT) Received: from resomta-h2p-554994.sys.comcast.net ([96.102.179.205]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 256/256 bits) (Client did not present a certificate) by resdmta-h2p-564583.sys.comcast.net with ESMTPS id gaLzugbsElvmagaz5uniRn; Tue, 29 Jul 2025 03:26:35 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcastmailservice.net; s=20211018a; t=1753759595; bh=QUDgCVt6Qnfd71COChh559DH6f7iEmfXnnzFxwfexjc=; h=Received:Received:Received:Received:From:To:Subject:Date: Message-ID:Xfinity-Spam-Result; b=Fgai+gx5JIgitGe/jOBFZQsY38LCGB4jS9xFWFyhDbRB/BEQPszWAyJyErXv2Tv7z 1QKWQjOQpAPyUWHTOUcw2ZGPsYlC6gTQGD+tXJFLVzhTVQqjvwtiqEzQxoVUdx55sc C1k12WMStASnT3zvHbsmPrfXMDW4MrF1vZ/sHaGUPomTD2NYaojN5XcobY6ZnJeBWY 61nvkVAvs5TWx0fmChe3Ztg1BbtIXO2UNG04iHdjEJV60N4/dXeGRUP+/QNS6LEbhC re2D75RTW7YiiBG3vM7TguD5zK+/wEu9Y6K0mB9IQQ+AAZXwHVfVAFqtCRW1j0c+/P 2JfFnIEeu2c0g== Received: from hobgoblin.ariadne.com ([IPv6:2601:192:4a00:430::ef8f]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 256/256 bits) (Client did not present a certificate) by resomta-h2p-554994.sys.comcast.net with ESMTPSA id gayvu55F5RFTngayyuq6jG; Tue, 29 Jul 2025 03:26:35 +0000 Received: from hobgoblin.ariadne.com (localhost [127.0.0.1]) by hobgoblin.ariadne.com (8.16.1/8.16.1) with ESMTPS id 56T1QEr72215445 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Mon, 28 Jul 2025 21:27:00 -0400 Received: (from worley@localhost) by hobgoblin.ariadne.com (8.16.1/8.16.1/Submit) id 56T1GdTb2215243; Mon, 28 Jul 2025 21:16:39 -0400 X-Authentication-Warning: hobgoblin.ariadne.com: worley set sender to Dale.Worley@comcast.net using -f From: worley@ariadne.com (Dale R. Worley) To: Dan Mongrain In-Reply-To: (dan.mongrain=40motorolasolutions.com@dmarc.ietf.org) Sender: worley@ariadne.com (Dale R. Worley) Date: Mon, 28 Jul 2025 21:16:39 -0400 Message-ID: <87jz3raj9k.fsf@hobgoblin.ariadne.com> X-CMAE-Envelope: MS4xfI4APvhDsP7reOeQdFnx29D29fGyA+rM22NQd/yXuf24Gi1Y0bmWCs3ECbVzOSDSq/5Qwh8Aup6SU2TeCUt4BjIt/4FCl7L4T70kizfdxv/kMNxW1dRQ FWCyWlak0dQvzVr3jgRjjLetckgkMcnehdNX0iPZBLXUweEU3MXTWPQ16QTI49uoqgU99XEuYG8jiix67aTLHMcvq1M98VGRGv+yTb1O/eglG6DGyPBNFsDU +ZigJkeCs5jRWVmvEdTEiGC16LSu0l0BDzaNfa5c8U+GHrlIr5znuEl4XQhK41qaQZ20fTmOsRQ5lIOt7bVwaWhShZs1OFgLxAsU/CrylufHyVNuyyLyiqX4 U8ooYU+y Message-ID-Hash: NRQHNC3VTKWDHMZGMYAO4T5WUBCZOUIC X-Message-ID-Hash: NRQHNC3VTKWDHMZGMYAO4T5WUBCZOUIC X-MailFrom: dale.worley@comcast.net X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-sipcore.ietf.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: pkyzivat=40alum.mit.edu@dmarc.ietf.org, sipcore@ietf.org X-Mailman-Version: 3.3.9rc6 Precedence: list Subject: =?utf-8?q?=5Bsipcore=5D_Re=3A_draft-martin-sipcore-retransmission-allowed-fi?= =?utf-8?q?xes-00?= List-Id: SIP Core Working Group Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Dan Mongrain writes: > I confirm, simply looking at the NG9-1-1 deployment in Canada I see both > usages in production. It will be painful one way or the other. This seems to be a situation where "be strict in what you send and tolerant in what you receive" should be applied. It may be that we need to specify that all implementations MUST send a particular two values but MUST be prepared to receive and interpret correctly all four values. It seems to me that we need to get solid information on deployed implementations. Dale