[tcpm] I-D Action:draft-ietf-tcpm-rfc4138bis-04.txt

Internet-Drafts@ietf.org Thu, 30 October 2008 09:15 UTC

Return-Path: <tcpm-bounces@ietf.org>
X-Original-To: tcpm-archive@megatron.ietf.org
Delivered-To: ietfarch-tcpm-archive@core3.amsl.com
Received: from [] (localhost []) by core3.amsl.com (Postfix) with ESMTP id 3976B28C20B; Thu, 30 Oct 2008 02:15:04 -0700 (PDT)
X-Original-To: tcpm@ietf.org
Delivered-To: tcpm@core3.amsl.com
Received: by core3.amsl.com (Postfix, from userid 0) id 2BF7A3A67D0; Thu, 30 Oct 2008 02:15:01 -0700 (PDT)
From: Internet-Drafts@ietf.org
To: i-d-announce@ietf.org
Content-Type: Multipart/Mixed; Boundary="NextPart"
Mime-Version: 1.0
Message-Id: <20081030091502.2BF7A3A67D0@core3.amsl.com>
Date: Thu, 30 Oct 2008 02:15:02 -0700
Cc: tcpm@ietf.org
Subject: [tcpm] I-D Action:draft-ietf-tcpm-rfc4138bis-04.txt
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Archive: <https://www.ietf.org/mailman/private/tcpm>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
Sender: tcpm-bounces@ietf.org
Errors-To: tcpm-bounces@ietf.org

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 Working Group of the IETF.

	Title           : Forward RTO-Recovery (F-RTO): An Algorithm for Detecting Spurious Retransmission Timeouts with TCP
	Author(s)       : P. Sarolahti, et al.
	Filename        : draft-ietf-tcpm-rfc4138bis-04.txt
	Pages           : 21
	Date            : 2008-10-30

The purpose of this document is to move the F-RTO functionality for
 TCP in RFC 4138 from Experimental to Standards Track status. The F-
 RTO support for SCTP in RFC 4138 remains with Experimental status.
 See Appendix B for the differences between this document and RFC

 Spurious retransmission timeouts cause suboptimal TCP performance
 because they often result in unnecessary retransmission of the last
 window of data.  This document describes the F-RTO detection
 algorithm for detecting spurious TCP retransmission timeouts.  F-RTO
 is a TCP sender-only algorithm that does not require any TCP options
 to operate.  After retransmitting the first unacknowledged segment
 triggered by a timeout, the F-RTO algorithm of the TCP sender
 monitors the incoming acknowledgments to determine whether the
 timeout was spurious.  It then decides whether to send new segments
 or retransmit unacknowledged segments.  The algorithm effectively
 helps to avoid additional unnecessary retransmissions and thereby
 improves TCP performance in the case of a spurious timeout.

A URL for this Internet-Draft is:

Internet-Drafts are also available by anonymous FTP at:

Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
tcpm mailing list