Hi,
I can confirm adding the boot option iovDisableIR=TRUE does do the trick. After adding and modifying the most recent tg3 drivers for the NIC I was able to get it up and running (have to add in the PCI device ID, looking at the drivers source code there is support for the specific revision it just isn't included on the PCI device mapping tables).
Thanks for the speedy help !!
Cheers