I am attempting to configure m0n0wall on a custom router with multiple
NICs (3).  2 fast ethernet and one gigabit with jumbo frames activated
(9014 MTU) 1 fast ethernet is the WAN link, the other is the OPT1 link.
the gigabit link is LAN link. I am bridging LAN and OPT1

In the xml config file.  I have a shell command of "/sbin/ifconfig em0
mtu 9014" which is the proper syntax to set the Intel card to 9014 MTU.

Right off the bat, does anyone see any issues and problems with what I
am doing?  Is this even possible?
I'm trying to do this right now and I am getting very poor results. 
Even my fast ethernet transfers max out at around 6MBps.
gigabit->gigabit transfers also max out to about 6MBps.

Thanks
Andy