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Setting the 'Jumbo Packet' option to 9000 bytes on an Intel PRO 1000 NIC on Windows Vista x86

The default option of 1500/4088/9014bytes weren't suitable, so tweak the registry for the Intel PRO 1000 driver to support a 9000byte packet.

The Windows Vista x86 box runs on a network with Linux VM's with a 9000byte MTU. The driver is the latest at the time of writing (Feb 2009).

Intel(R) PRO/1000 PT Desktop Adapter Properties - Driver

Tweak the registry to add a '8000 Bytes' option, and set the '*JumboPacket' option to 9000:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\Class\
    {4D36E972-E325-11CE-BFC1-08002BE10318}\0015]

"*JumboPacket"= "9000"

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\Class\
    {4D36E972-E325-11CE-BFC1-08002BE10318}\0015\Ndi\savedParams\
    *JumboPacket\Enum]

"9000"="9000 Bytes"

If loading the registry file directly, ensure that the path is the same. Specifically check the class UUID and the '0015' index.

Once the registry has been tweaked, the option can be selected from the UI (or manually tweaked from the registry).

Intel(R) PRO/1000 PT Desktop Adapter Properties - Advanced Adapter Settings

 

Links

http://support.intel.com/support/network/sb/CS-006120.htm

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