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Using Netsh command to view TCP Chimney Offload in the operating system

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TCP Chimney Offload is a networking technology that helps transfer the workload from the CPU to a network adapter during network data transfer (source: Microsoft)

How to configure TCP Chimney Offload in the operating system

  • To enable TCP Chimney Offload, follow these steps:
    1. Use administrative credentials to open a command prompt.
    2. At the command prompt, type the following command, and then press ENTER:
      netsh int tcp set global chimney=enabled
  • To disable TCP Chimney Offload, follow these steps:
    1. Use administrative credentials to open a command prompt.
    2. At the command prompt, type the following command, and then press ENTER:
      netsh int tcp set global chimney=disabled
  • To determine the current status of TCP Chimney Offload, follow these steps:
    1. Use administrative credentials to open a command prompt.
    2. At the command prompt, type the following command, and then press ENTER:
      netsh int tcp show global

These are the results on Windows 10 version 1709 OS Build 16.299.248:

netsh command to show chimney offload state

 

On another note

The registry key : Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters   will display

tcpip parameters

 

Further inside of the TCPiP hive you can see the same information and more details about the DHCP stack associated with the interface ID:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{03dc51ef-d26e-4e33-9c84-319046c9c133}

Where the long number starting with 03dc… is the interface id of the NIC . The registry key will display the DHCP information of r card in use:

dhcp domain

additional recommended reading on the topic: https://support.microsoft.com/en-us/help/951037/information-about-the-tcp-chimney-offload-receive-side-scaling-and-net


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