From: Marvin Greenlee (marvin@ipexpert.com)
Date: Fri Mar 02 2007 - 13:49:00 ART
"...When using a standard TCP implementation to send keystrokes between
machines, TCP tends to send one packet for each keystroke typed. On larger
networks, many small packets use up bandwidth and contribute to congestion.
The algorithm developed by John Nagle (RFC 896) helps alleviate the
small-packet problem in TCP. In general, it works this way: The first
character typed after connection establishment is sent in a single packet,
but TCP holds any additional characters typed until the receiver
acknowledges the previous packet. Then the second, larger packet is sent,
and additional typed characters are saved until the acknowledgment comes
back. The effect is to accumulate characters into larger chunks, and pace
them out to the network at a rate matching the round-trip time of the given
connection. This method is usually effective for all TCP-based traffic.
However, do not use the service nagle command if you have XRemote users on X
Window system sessions..."
http://www.cisco.com/en/US/products/ps6566/products_command_reference_chapte
r09186a008079e039.html#wp1010245
Marvin Greenlee, CCIE #12237 (R&S, SP, Sec)
Senior Technical Instructor - IPexpert, Inc.
"When Will You Be an IP Expert?"
marvin@ipexpert.com
http://www.IPexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
nhatphuc
Sent: Friday, March 02, 2007 10:28 AM
To: Cisco certification
Subject: Nagle congestion control algorithm
Hi Group,
What is the Nagle congestion control algorithm? What is it used for?
Thanks
Phuc
This archive was generated by hypermail 2.1.4 : Sun Apr 01 2007 - 06:35:49 ART