On 6/24/11, Christopher Chan <christopher.chan at bradbury.edu.hk> wrote: > On Friday, June 24, 2011 01:20 AM, Emmanuel Noobadmin wrote: >> First bottleneck was discovering the max MTU allowed on these is 7K >> instead of 9K but googling seems to indicate that the RTL8168B is only >> capable of 4K frames. > > Yeah, the 8168C goes up to 7k. Some 8168B go up to 6k. In cases like this where there are conflicting sources of information regarding the max MTU of a NIC, what would be the correct way to determine the actual max MTU? I figured the 7K limit basically by doing a binary search with the ifconfig mtu commands. But is the this figure simply what the driver will accept for the controller it identified or is that the actual hardware limit?