Here is the maximum MTU sizes supported by ESX, Windows, and EMC. Jumbo Frames are useful for better performance on hosts and storage since large frames result in less CPU cycles.
- ESX 4.0 Jumbo Frames up to 9KB (9000 Bytes)
- Windows 2008,windows 2003 - limited by network card/application. For more information, refer to http://support.microsoft.com/kb/314496 and http://msdn.microsoft.com/en-us/library/ms817967.aspx.
- CLARiiON CX 3-10c (9000 bytes)