On Friday, June 24, 2011 05:06 PM, Ljubomir Ljubojevic wrote: > Christopher Chan wrote: >> 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. > > > > This post: > http://ubuntuforums.org/showthread.php?t=1628575 > Suggests that Windows and OpenSolaris were pusing 3x more then his > current Ubuntu. This would suggest Linux driver problem. That is why I > suggested ElRepo driver. No way jumbo frames is enabled on OpenSolaris/OpenIndiana. I run OpenIndiana here with boards that have realtek onboard. They refuse to enable jumbo frame support.