XPS M1730 with Broadcom netxtreme gigabit and Jumbo Frames

I have the XPS M1730 with the Broadcom NetXtreme 57xx gigbit LAN controller. I believe it to be the BCM5754M chip based on the dev ID of 1672. I've seen stuff on the internet that it does support Jumbo Frames.

Does this chip support jumbo frames? If so how do I enable or set the size because I can't see that in the configuration for the braodcom drivers. I have the drivers from the Dell site version 10.43.??

Thanks