I previous wrote about disabling TCP chimney and disabling auto-tuning - but what if you just want to see the status of these services? In Widows 2008 and Windows Vista, netsh provides a status summary of these. You can view this information by running the following command:
netsh int tcp show global
This yields the following output:
Querying active state...
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : disabled
Receive Window Auto-Tuning Level : disabled
Add-On Congestion Control Provider : none
ECN Capability : disabled
RFC 1323 Timestamps : disabled
The second and third line show the chimney status and receive window auto-tuning level respectively. Auto-tuning is only available on Windows Server 2008 and Windows Vista whereas chimney is available as of Windows 2003 SP2 or SP1 with the SNP (Scalable Networking Pack) installed.
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