The higher number seems to be from the netperf benchmark. See
https://www.phoronix.com/scan.php?page=article&item=raspberrypi-3-bplus&num=3


> On Apr 5, 2018, at 10:02 AM, Steve Simon <steve@quintile.net> wrote:
> 
> 
> hi,
> 
> great work richard, i hope to try this soon. the network performance is the biggest draw for me.
> 
> do you any feeling why plan9 sees only 200Mbps ether?
> 
> is it the stack design, how plan9 accesses the hardware? or maybe the 300Mbps quoted is only when using jumbo frames?
> 
> -Steve
> 
> 
> On 5 Apr 2018, at 16:03, Richard Miller <9fans@hamnavoe.com> wrote:
> 
>>> Running Linux, 3B+ seems perceptibly faster than 3B.
>> 
>> 1400Mhz vs 1200Mhz might be perceptible, and the improved
>> heat management will help if your CPU frequency was being
>> temperature-throttled.
>> 
>> Ethernet bandwidth for the 3B+ on linux is claimed to be
>> about 300Mbit/s.  With Plan 9, I'm seeing a limit of
>> just over 200Mbit/s.  Not gigabit, but still it's a 2x
>> improvement over earlier models.
>> 
>> Note: you need to use Cat 6 cable to get more than 100MB/s
>> speed.  I discovered this the hard way.  The orange LED
>> on the RJ45 socket goes on if the link is in gigabit mode.
>> 
> 
>