I recently bought 2 asus XG-C100C 10gbe nic's one for unRaid and one for the client. It supports jumbo frames 9kb which I was able to enable on the windows client machine. The problem is on the unRaid machine. When I run "ifconfig eth0 mtu 9000" to test it out I get "SIOCSIFMTU: Invalid argument". I am currently running 6.4.0-rc8q.