Quote Originally Posted by lly View Post
Was you try statement above on PC or original ASUS FW?
On the PC I've sucessfully changed the MTU to 7000 with basically the same command (same except I had to use sudo).
It's the router (with r1389 firmware) that has failed the ifconfig command.

The reason why I tried to use 7000 bytes (instead of 9000) is that the RealTek chip used in my PC's NIC supports only 7000 bytes.