Windows Networking Advanced Features

Windows Networking Advanced Features

Advanced Network cards and Software provide allot of features to offload the TCP processing off the OS to the Network Card.

This can also cause allot of strange Networking issues. If you believe that the problem might be occurring at the Networking Card/Team/Network Driver. Disable some of the following features and test:

The follow commands can be used to test and disable/enable Advanced Networking Features:

netsh int tcp set global chimney=disabled
netsh interface tcp set global rss=disabled
netsh interface tcp set global autotuning=disabled
  • Show TCP Global Parameters
netsh in tcp show global
  • Verify TCP Offload
netstat -t

 

 

TCP Global Parameters

———————————————-

  • Receive-Side Scaling State : enabled
  • Chimney Offload State : enabled
  • NetDMA State : enabled
  • Direct Cache Acess (DCA) : disabled
  • Receive Window Auto-Tuning Level : normal
  • Add-On Congestion Control Provider : ctcp
  • ECN Capability : disabled
  • RFC 1323 Timestamps : disabled

Broadcom Advanced Features – http://www.broadcom.com/collateral/pb/5709S-PB02-R.pdf

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