Troubles with 'em' driver and UDP packets

[Willem Jan Withagen]

On 20/03/2015 10:42, Vaidas Damoševičius wrote:
> It's not cabling problem :)
> 
> Another example with -b and -i :
> 
> vd at v0s4:~ % iperf3 -u -c 1.2.3.4 -i4 -b1000m -P1
> Connecting to host 1.2.3.4, port 5201
> [  4] local 1.2.3.3 port 10672 connected to 1.2.3.4 port 5201
> [ ID] Interval           Transfer     Bandwidth       Total Datagrams
> [  4]   0.00-4.00   sec   446 MBytes   935 Mbits/sec  1761605  
> [  4]   4.00-8.00   sec   457 MBytes   958 Mbits/sec  1809551  
> [  4]   8.00-10.00  sec   228 MBytes   958 Mbits/sec  900740  
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams
> [  4]   0.00-10.00  sec  1.10 GBytes   949 Mbits/sec  770.668 ms  0/35 (0%)  
> [  4] Sent 35 datagrams
> 
> Result is totaly different.
> 

>> On 20 Mar 2015, at 11:29, Mehmet Erol Sanliturk <m.e.sanliturk at gmail.com> wrote:
>> I think you use Gigabit CROSS cable ( cat 5e or cat 6 ) .
>> CROSS cable is required if connection is from computer to computer .
>>
>> Only for remaindering .

to the best of my knowledge:
The standard for 1Gbit requires the media interface to do crossover
automagically, thus removing the requirement for X-cables.
And that also holds for computer <> computer connections.

--WjW