[Tsvwg] HighSpeed TCP

[Sally Floyd <[e-mail]>]

Two new internet-drafts are just out about HighSpeed TCP.  This is
going to be discussed in tsvwg in Yokohama.  I have created a web
page for this at "http://www.icir.org/floyd/hstcp.html", and any
feedback would be appreciated.

Many thanks,
- Sally
http://www.icir.org/floyd/

------- Forwarded Messages

Date:    Fri, 14 Jun 2002 07:30:01 -0400
From:    [e-mail]
To:      IETF-Announce: ;
Subject: I-D ACTION:draft-floyd-tcp-highspeed-00.txt,.ps

--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: HighSpeed TCP for Large Congestion Windows
	Author(s)	: S. Floyd
	Filename	: draft-floyd-tcp-highspeed-00.txt,.ps
	Pages		: 16
	Date		: 13-Jun-02
	
This document proposes HighSpeed TCP, a modification to TCP's
congestion control mechanism for use with TCP connections with large
congestion windows.  The congestion control mechanisms of the
current, Standard TCP constrains the congestion windows that can be
achieved by TCP in realistic environments.  For example, for a
Standard TCP connection with 1500-byte packets and a 100 ms round-
trip time, achieving a steady-state throughput of 10 Gbps would
require an average congestion window of 83,333 segments, and a packet
drop rate of at most one congestion event every 5,000,000,000 packet
(or equivalently, at most one congestion event every 1 2/3 hours).
We do not consider this a realistic condition.  To address this
limitation of TCP, this document proposes HighSpeed TCP, and solicits
experimentation and feedback from the wider community.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-floyd-tcp-highspeed-00.txt

To remove yourself from the IETF Announcement list, send a message to 
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Internet-Drafts are also available by anonymous FTP. Login with the username
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type "cd internet-drafts" and then
	"get draft-floyd-tcp-highspeed-00.txt".

A list of Internet-Drafts directories can be found in
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Internet-Drafts can also be obtained by e-mail.

Send a message to:
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------- Message 2

Date:    Fri, 14 Jun 2002 07:30:25 -0400
From:    [e-mail]
To:      IETF-Announce: ;
Subject: I-D ACTION:draft-floyd-tcp-slowstart-00.txt,.ps

--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: Limited Slow-Start for TCP with Large Congestion 
                          Windows
	Author(s)	: S. Floyd
	Filename	: draft-floyd-tcp-slowstart-00.txt,.ps
	Pages		: 5
	Date		: 13-Jun-02
	
This note proposes a modification for TCP's slow-start for use with
TCP connections with large congestion windows.  For TCP connections
that are able to use congestion windows of thousands (or tens of
thousands) of MSS-sized segments (for MSS the sender's MAXIMUM
SEGMENT SIZE), the current slow-start procedure can result in
increasing the congestion window by thousands of segments in a single
round-trip time.  Such an increase can easily result in thousands of
packets being dropped in one round-trip time.  This is often counter-
productive for the TCP flow itself, and is also hard on the rest of
the traffic sharing the congested link.  This note proposes Limited
Slow-Start, limiting the number of segments by which the congestion
window is increased for one window of data during slow-start, in
order to improve performance for TCP connections with large
congestion windows.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-floyd-tcp-slowstart-00.txt

To remove yourself from the IETF Announcement list, send a message to 
ietf-announce-request with the word unsubscribe in the body of the message.

Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
	"get draft-floyd-tcp-slowstart-00.txt".

A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html 
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


Internet-Drafts can also be obtained by e-mail.

Send a message to:
	[e-mail].
In the body type:
	"FILE /internet-drafts/draft-floyd-tcp-slowstart-00.txt".
	
NOTE:	The mail server at ietf.org can return the document in
	MIME-encoded form by using the "mpack" utility.  To use this
	feature, insert the command "ENCODING mime" before the "FILE"
	command.  To decode the response(s), you will need "munpack" or
	a MIME-compliant mail reader.  Different MIME-compliant mail readers
	exhibit different behavior, especially when dealing with
	"multipart" MIME messages (i.e. documents which have been split
	up into multiple messages), so check your local documentation on
	how to manipulate these messages.
		
		
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.

--NextPart
Content-Type: Multipart/Alternative; Boundary="OtherAccess"

--OtherAccess
Content-Type: Message/External-body;
	access-type="mail-server";
	server="[e-mail]"

Content-Type: text/plain
Content-ID:	<[e-mail]>

ENCODING mime
FILE /internet-drafts/draft-floyd-tcp-slowstart-00.txt

--OtherAccess
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	name="draft-floyd-tcp-slowstart-00.txt";
	site="ftp.ietf.org";
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--OtherAccess--

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