Re: [MMUSIC] WGLC of last set of changes to Bundle (draft-ietf-mmusic-sdp-bundle-negotiation-22)
Magnus Westerlund <magnus.westerlund@ericsson.com> Tue, 23 June 2015 08:14 UTC
Return-Path: <magnus.westerlund@ericsson.com>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EE67D1A907E for <mmusic@ietfa.amsl.com>; Tue, 23 Jun 2015 01:14:00 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.201
X-Spam-Level:
X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham
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 ipuKvs-Jltqz for <mmusic@ietfa.amsl.com>; Tue, 23 Jun 2015 01:14:00 -0700 (PDT)
Received: from sesbmg23.ericsson.net (sesbmg23.ericsson.net [193.180.251.37]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6DB441A905F for <mmusic@ietf.org>; Tue, 23 Jun 2015 01:13:59 -0700 (PDT)
X-AuditID: c1b4fb25-f79b66d000001131-cc-558915456215
Received: from ESESSHC003.ericsson.se (Unknown_Domain [153.88.253.125]) by sesbmg23.ericsson.net (Symantec Mail Security) with SMTP id 3B.3B.04401.54519855; Tue, 23 Jun 2015 10:13:57 +0200 (CEST)
Received: from [127.0.0.1] (153.88.183.153) by smtp.internal.ericsson.com (153.88.183.29) with Microsoft SMTP Server id 14.3.210.2; Tue, 23 Jun 2015 10:13:57 +0200
Message-ID: <55891543.5000303@ericsson.com>
Date: Tue, 23 Jun 2015 10:13:55 +0200
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
MIME-Version: 1.0
To: mmusic <mmusic@ietf.org>
References: <5588071E.9090700@cisco.com>
In-Reply-To: <5588071E.9090700@cisco.com>
Content-Type: text/plain; charset="windows-1252"; format="flowed"
Content-Transfer-Encoding: 8bit
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrMLMWRmVeSWpSXmKPExsUyM+Jvra6raGeowZap+hafujewWUxd/pjF gcljyZKfTB5fLn9mC2CK4rJJSc3JLEst0rdL4MqYMeMEc8F5nornK88zNTA2cHUxcnJICJhI tB5ZygRhi0lcuLeerYuRi0NI4CijxMFHp6Cc5YwSn86/BXI4OHgFtCU2TWIHaWARUJXY/u4a C4jNJmAhcfNHIxuILSoQJTH18TqwOK+AoMTJmU/AbBEBGYm9mzYzg9jMApUSD3/0gS0WFsiU mPz1OpgtJKAhce7ZMbB6TgFNiaubtzKDrGUWsJd4sLUMolVeonnrbGaIcm2JhqYO1gmMgrOQ bJuF0DELSccCRuZVjKLFqcVJuelGxnqpRZnJxcX5eXp5qSWbGIGhenDLb9UdjJffOB5iFOBg VOLhXbC3I1SINbGsuDL3EKM0B4uSOO+MzXmhQgLpiSWp2ampBalF8UWlOanFhxiZODilGhjr Zfyjvf6FXxO13vkmMyG5Xe4+T8By1qp/L/ozEzR9NKQ2Hp64qljgc3OTo1PchNx0CyEGrsZP +ubmO7+u+qK+YEObr57Sn42Mexdc/5SqoPk17fuXwPkTWKVzXr5YxjhZ8pL4tBPX9qwN/P9K iK/l92EBzUhmQ42iADVvdw/p0KMnvDXnTFBiKc5INNRiLipOBACaWyHONgIAAA==
Archived-At: <http://mailarchive.ietf.org/arch/msg/mmusic/0Mag3_NpEG2UpwybqjGZ5w0H5ik>
Cc: "draft-ietf-mmusic-sdp-bundle-negotiation@tools.ietf.org" <draft-ietf-mmusic-sdp-bundle-negotiation@tools.ietf.org>
Subject: Re: [MMUSIC] WGLC of last set of changes to Bundle (draft-ietf-mmusic-sdp-bundle-negotiation-22)
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/mmusic/>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 23 Jun 2015 08:14:01 -0000
Hi,
I looked at the changes and wonder if I spotted an inconsistency?
Otherwise things looks good.
In Section 5 text was changed to enable non-symmetric RTP usages.
Resulting in the following text:
The address:port combination used for sending bundled media
MAY be the same as the BUNDLE address, used to receive bundled media,
depending on whether symmetric RTP [RFC4961] is used.
From 10.3.1:
If RTP/RTCP multiplexing is enabled, the same address:port
combination will be used for receiving (and sending) all RTP packets
and the RTCP packets associated with the BUNDLE group. Each endpoint
will send the packets towards the BUNDLE address of the other
endpoint.
This appears to strongly suggest that one should/must use symmetric RTP
when doing RTP/RTCP muxing. However, I find nothing in RFC 5761 that
mandates usage of symmetric RTP with RTP/RTCP Mux, even if it the text
is written with that as an assumption, I find nothing that prevents
non-symmetric sending.
Thus, I wonder if the text in 10.3.1 needs to be updated to avoid this
issue.
Cheers
Magnus Westerlund
----------------------------------------------------------------------
Services, Media and Network features, Ericsson Research EAB/TXM
----------------------------------------------------------------------
Ericsson AB | Phone +46 10 7148287
Färögatan 6 | Mobile +46 73 0949079
SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com
----------------------------------------------------------------------
- [MMUSIC] WGLC of last set of changes to Bundle (d… Flemming Andreasen
- Re: [MMUSIC] WGLC of last set of changes to Bundl… Paul Kyzivat
- Re: [MMUSIC] WGLC of last set of changes to Bundl… Stach, Thomas
- Re: [MMUSIC] WGLC of last set of changes to Bundl… Christer Holmberg
- Re: [MMUSIC] WGLC of last set of changes to Bundl… Magnus Westerlund
- Re: [MMUSIC] WGLC of last set of changes to Bundl… Christer Holmberg