On Friday, June 24, 2011 02:33 PM, Emmanuel Noobadmin wrote: > 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? Given that these are the limits from Realtek's own Windows drivers, I'd say they are hardware limits and different from chipset/rev.