From nobody Thu May 4 01:24:36 2017 Return-Path: X-Original-To: tcpm@ietf.org Delivered-To: tcpm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 92E5B1276AF; Thu, 4 May 2017 01:24:34 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: tcpm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.50.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <149388627454.4787.606036084397804005@ietfa.amsl.com> Date: Thu, 04 May 2017 01:24:34 -0700 Archived-At: Subject: [tcpm] I-D Action: draft-ietf-tcpm-alternativebackoff-ecn-01.txt X-BeenThere: tcpm@ietf.org X-Mailman-Version: 2.1.22 List-Id: TCP Maintenance and Minor Extensions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 May 2017 08:24:35 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the TCP Maintenance and Minor Extensions of the IETF. Title : TCP Alternative Backoff with ECN (ABE) Authors : Naeem Khademi Michael Welzl Grenville Armitage Godred Fairhurst Filename : draft-ietf-tcpm-alternativebackoff-ecn-01.txt Pages : 11 Date : 2017-05-04 Abstract: Recent Active Queue Management (AQM) mechanisms instantiate shallow buffers with burst tolerance to minimise the time that packets spend enqueued at a bottleneck. However, shallow buffering can cause noticeable performance degradation when TCP is used over a network path with a large bandwidth-delay-product. Traditional methods rely on detecting network congestion through reported loss of transport packets. Explicit Congestion Notification (ECN) instead allows a router to directly signal incipient congestion. A sending endpoint can distinguish when congestion is signalled via ECN, rather than by packet loss. An ECN signal indicates that an AQM mechanism has done its job, and therefore the bottleneck network queue is likely to be shallow. This document therefore proposes an update to the TCP sender-side ECN reaction in congestion avoidance to reduce the FlightSize by a smaller amount than the congestion control algorithm's reaction to loss. Future versions of this document will also describe a corresponding method for the Stream Control Transmission Protocol (SCTP). The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-tcpm-alternativebackoff-ecn/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-tcpm-alternativebackoff-ecn-01 https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-alternativebackoff-ecn-01 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-tcpm-alternativebackoff-ecn-01 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Thu May 4 01:38:38 2017 Return-Path: X-Original-To: tcpm@ietfa.amsl.com Delivered-To: tcpm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6957B1200F1 for ; Thu, 4 May 2017 01:38:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.902 X-Spam-Level: X-Spam-Status: No, score=-1.902 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no 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 BNMf0CNmgyki for ; Thu, 4 May 2017 01:38:33 -0700 (PDT) Received: from mail-out02.uio.no (mail-out02.uio.no [IPv6:2001:700:100:8210::71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AA2EB1279E5 for ; Thu, 4 May 2017 01:38:33 -0700 (PDT) Received: from mail-mx04.uio.no ([129.240.10.25]) by mail-out02.uio.no with esmtp (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1d6CHO-0001Nc-Qu for tcpm@ietf.org; Thu, 04 May 2017 10:38:30 +0200 Received: from [89.202.203.52] (helo=[10.243.34.81]) by mail-mx04.uio.no with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) user michawe (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1d6CHO-0003Oq-6M for tcpm@ietf.org; Thu, 04 May 2017 10:38:30 +0200 From: Michael Welzl Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Date: Thu, 4 May 2017 10:38:28 +0200 References: <149388627454.4787.606036084397804005@ietfa.amsl.com> To: tcpm IETF list In-Reply-To: <149388627454.4787.606036084397804005@ietfa.amsl.com> Message-Id: <0381F319-2186-400E-8E9A-0E50DD03ECD9@ifi.uio.no> X-Mailer: Apple Mail (2.3273) X-UiO-SPF-Received: Received-SPF: neutral (mail-mx04.uio.no: 89.202.203.52 is neither permitted nor denied by domain of ifi.uio.no) client-ip=89.202.203.52; envelope-from=michawe@ifi.uio.no; helo=[10.243.34.81]; X-UiO-Ratelimit-Test: rcpts/h 7 msgs/h 3 sum rcpts/h 9 sum msgs/h 5 total rcpts 54409 max rcpts/h 54 ratelimit 0 X-UiO-Spam-info: not spam, SpamAssassin (score=-4.5, required=5.0, autolearn=disabled, AWL=0.500, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: AA0CED4263033029B840C2A6A309AC41254F7D4E X-UiO-SPAM-Test: remote_host: 89.202.203.52 spam_score: -44 maxlevel 80 minaction 2 bait 0 mail/h: 3 total 123 max/h 8 blacklist 0 greylist 0 ratelimit 0 Archived-At: Subject: Re: [tcpm] I-D Action: draft-ietf-tcpm-alternativebackoff-ecn-01.txt X-BeenThere: tcpm@ietf.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: TCP Maintenance and Minor Extensions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 May 2017 08:38:36 -0000 Hi everyone, JFYI, there were no technical changes here, but we worked much with the = text to make it easier to read - mostly due to feedback from Stuart = Cheshire. Cheers, Michael > On May 4, 2017, at 10:24 AM, Internet-Drafts@ietf.org wrote: >=20 >=20 > A New Internet-Draft is available from the on-line Internet-Drafts = directories. > This draft is a work item of the TCP Maintenance and Minor Extensions = of the IETF. >=20 > Title : TCP Alternative Backoff with ECN (ABE) > Authors : Naeem Khademi > Michael Welzl > Grenville Armitage > Godred Fairhurst > Filename : draft-ietf-tcpm-alternativebackoff-ecn-01.txt > Pages : 11 > Date : 2017-05-04 >=20 > Abstract: > Recent Active Queue Management (AQM) mechanisms instantiate shallow > buffers with burst tolerance to minimise the time that packets spend > enqueued at a bottleneck. However, shallow buffering can cause > noticeable performance degradation when TCP is used over a network > path with a large bandwidth-delay-product. Traditional methods rely > on detecting network congestion through reported loss of transport > packets. Explicit Congestion Notification (ECN) instead allows a > router to directly signal incipient congestion. A sending endpoint > can distinguish when congestion is signalled via ECN, rather than by > packet loss. An ECN signal indicates that an AQM mechanism has done > its job, and therefore the bottleneck network queue is likely to be > shallow. This document therefore proposes an update to the TCP > sender-side ECN reaction in congestion avoidance to reduce the > FlightSize by a smaller amount than the congestion control > algorithm's reaction to loss. Future versions of this document will > also describe a corresponding method for the Stream Control > Transmission Protocol (SCTP). >=20 >=20 > The IETF datatracker status page for this draft is: > = https://datatracker.ietf.org/doc/draft-ietf-tcpm-alternativebackoff-ecn/ >=20 > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-tcpm-alternativebackoff-ecn-01 > = https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-alternativebackoff-e= cn-01 >=20 > A diff from the previous version is available at: > = https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-tcpm-alternativebackoff-ecn= -01 >=20 >=20 > Please note that it may take a couple of minutes from the time of = submission > until the htmlized version and diff are available at tools.ietf.org. >=20 > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ >=20 > _______________________________________________ > tcpm mailing list > tcpm@ietf.org > https://www.ietf.org/mailman/listinfo/tcpm From nobody Wed May 10 00:00:06 2017 Return-Path: X-Original-To: tcpm@ietf.org Delivered-To: tcpm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 7AC9212714F; Tue, 9 May 2017 23:59:59 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: tcpm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.50.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <149439959945.28420.649977718983264115@ietfa.amsl.com> Date: Tue, 09 May 2017 23:59:59 -0700 Archived-At: Subject: [tcpm] I-D Action: draft-ietf-tcpm-dctcp-06.txt X-BeenThere: tcpm@ietf.org X-Mailman-Version: 2.1.22 List-Id: TCP Maintenance and Minor Extensions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 May 2017 07:00:00 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the TCP Maintenance and Minor Extensions of the IETF. Title : Datacenter TCP (DCTCP): TCP Congestion Control for Datacenters Authors : Stephen Bensley Dave Thaler Praveen Balasubramanian Lars Eggert Glenn Judd Filename : draft-ietf-tcpm-dctcp-06.txt Pages : 15 Date : 2017-05-09 Abstract: This informational memo describes Datacenter TCP (DCTCP), a TCP congestion control scheme for datacenter traffic. DCTCP extends the Explicit Congestion Notification (ECN) processing to estimate the fraction of bytes that encounter congestion, rather than simply detecting that some congestion has occurred. DCTCP then scales the TCP congestion window based on this estimate. This method achieves high burst tolerance, low latency, and high throughput with shallow- buffered switches. This memo also discusses deployment issues related to the coexistence of DCTCP and conventional TCP, the lack of a negotiating mechanism between sender and receiver, and presents some possible mitigations. DCTCP as described in this draft is applicable to deployments in controlled environments like datacenters but it must not be deployed over the public Internet without additional measures, as detailed in Section 5. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-tcpm-dctcp/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-tcpm-dctcp-06 https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-dctcp-06 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-tcpm-dctcp-06 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Mon May 29 01:16:36 2017 Return-Path: X-Original-To: tcpm@ietf.org Delivered-To: tcpm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 663FB120454; Mon, 29 May 2017 01:16:35 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: IETF Meeting Session Request Tool To: Cc: michael.scharf@nokia.com, tcpm@ietf.org, ietf@kuehlewind.net, tcpm-chairs@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.51.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <149604579537.3842.4016334856852672501.idtracker@ietfa.amsl.com> Date: Mon, 29 May 2017 01:16:35 -0700 Archived-At: Subject: [tcpm] tcpm - New Meeting Session Request for IETF 99 X-BeenThere: tcpm@ietf.org X-Mailman-Version: 2.1.22 List-Id: TCP Maintenance and Minor Extensions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 May 2017 08:16:35 -0000 A new meeting session request has just been submitted by Michael Scharf, a Chair of the tcpm working group. --------------------------------------------------------- Working Group Name: TCP Maintenance and Minor Extensions Area Name: Transport Area Session Requester: Michael Scharf Number of Sessions: 1 Length of Session(s): 2.5 Hours Number of Attendees: 80 Conflicts to Avoid: First Priority: iccrg tcpinc mptcp taps tsvarea tsvwg quic Second Priority: httpbis lwig maprg rtcweb rmcat teas People who must be present: Yoshifumi Nishida Michael Tuexen Michael Scharf Mirja Kuehlewind Resources Requested: Special Requests: --------------------------------------------------------- From nobody Tue May 30 18:48:29 2017 Return-Path: X-Original-To: tcpm@ietf.org Delivered-To: tcpm@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id E22CC126FB3; Tue, 30 May 2017 18:48:20 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: tcpm@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.52.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <149619530081.19775.15594177586480957917@ietfa.amsl.com> Date: Tue, 30 May 2017 18:48:20 -0700 Archived-At: Subject: [tcpm] I-D Action: draft-ietf-tcpm-accurate-ecn-03.txt X-BeenThere: tcpm@ietf.org X-Mailman-Version: 2.1.22 List-Id: TCP Maintenance and Minor Extensions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 May 2017 01:48:21 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the TCP Maintenance and Minor Extensions of the IETF. Title : More Accurate ECN Feedback in TCP Authors : Bob Briscoe Mirja Kuehlewind Richard Scheffenegger Filename : draft-ietf-tcpm-accurate-ecn-03.txt Pages : 41 Date : 2017-05-30 Abstract: Explicit Congestion Notification (ECN) is a mechanism where network nodes can mark IP packets instead of dropping them to indicate incipient congestion to the end-points. Receivers with an ECN- capable transport protocol feed back this information to the sender. ECN is specified for TCP in such a way that only one feedback signal can be transmitted per Round-Trip Time (RTT). Recently, new TCP mechanisms like Congestion Exposure (ConEx) or Data Center TCP (DCTCP) need more accurate ECN feedback information whenever more than one marking is received in one RTT. This document specifies an experimental scheme to provide more than one feedback signal per RTT in the TCP header. Given TCP header space is scarce, it overloads the three existing ECN-related flags in the TCP header and provides additional information in a new TCP option. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-tcpm-accurate-ecn/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-tcpm-accurate-ecn-03 https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-accurate-ecn-03 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-tcpm-accurate-ecn-03 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/