TCP Chimney

The goal of TCP Chimney is to reduce CPU utilization and increase network throughput for long-lived TCP connections with bulk transfers and applications that pre-post buffers. Moving TCP processing tasks to hardware frees up the server's CPU for other application tasks.

Windows Server 2008 Resources

• New Networking Features in Windows Server 2008 and Windows Vista
  This article provides an overview of features in Windows Server 2008, including TCP Chimney Offload, RSS, header-data split services, IPsec Task Offload version 2, and NetDMA.
• Information about TCP Chimney, Receive-Side Scaling and Network Direct Memory Access in Windows Sever 2008
  This article describes the TCP Chimney Offload, Receive-Side Scaling (RSS), and Network Direct Memory Access (NetDMA) features that are available for the TCP/IP protocol in Windows Server 2008.
• Netsh commands for Interface Transmission Control Protocol
  This reference topic provides details about the commands in the TCP context.

Windows Server 2003 Resources

• The Microsoft Windows Server 2003 Scalable Networking Pack
  This articles describes the High-Speed Networking (HSN) features in the Windows Server 2003 Scalable Networking Pack.
• Introduction to the Windows Server 2003 Scalable Networking Pack
  This white paper describes the architectural innovations introduced in the Windows Server 2003 Scalable Networking Pack.
• Windows Scalable Networking Initiative
  This white paper is intended for analysts and IT professionals who are interested in stateless and stateful offload technologies like RSS and TCP Chimney.
• SNP hotfix rollup package for Windows Server 2003 with Service Pack 2
  If you are running Windows Server 2003 Service Pack 2 (SP2), this hotfix rollup package resolves a variety of issues.

Developer Resources

• Windows Driver Kit for TCP Chimney
  This Windows Driver Kit topic provides instructions for obtaining NDIS 6.0 TCP Chimney documentation.
• Connection Offload
  This Windows Driver Kit topic points to other information, such as determining a network adapter's connection offload capabilities and enabling and disabling connection offload.