TCP Window Scaling

Table Of Contents

TCP Window Scaling

TCP Window Scaling

---

The TCP Window Scaling feature adds support for the Window Scaling option in RFC 1323. A larger window size is recommended to improve TCP performance in network paths with large bandwidth, long-delay characteristics that are called Long Fat Networks (LFNs). This TCP Window Scaling enhancement provides that support.

Configuration Information

Configuration information is included in the "Configuring TCP" module of the Cisco IOS IP Application Services Configuration Guide, Release 12.4T, at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124tcg/tiapp_c/htiptcp.htm

The following sections provide information about this feature:

•TCP Window Scaling

•Configuring TCP Performance Parameters

•Verifying TCP Performance Parameters

For a complete list of features included in the "Configuring TCP" module, see the Feature Information Table located toward the end of the module.

Command Reference Information

Command reference information is included in the Cisco IOS IP Application Services Command Reference, Release 12.2SB, at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122sb/cr/sbiap_r/index.htm

New or Modified Commands

The following command is modified for this feature:

•ip tcp window-size

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

© 2006 Cisco Systems, Inc. All rights reserved.