9 Feb 2017

[Facts] network speed difference by increasing the mtu (maximum transfer unit)

by | posted in: computer, network | 0

system:   2x NICs with 10 Gb/s SFP+ ports connected with fibre-cable (Intel 82599, Mellanox MNPA19-XTR)

test-software:  iperf3-3.1.3

result:  +5%

 

#with mtu=1500
[SUM] 0.00-10.00 sec  11.0 GBytes  9.45 Gbits/sec  sender
[SUM] 0.00-10.00 sec  11.0 GBytes  9.40 Gbits/sec  receiver

#with mtu=9000
[SUM] 0.00-10.00 sec  11.5 GBytes  9.92 Gbits/sec  sender
[SUM] 0.00-10.00 sec  11.5 GBytes  9.90 Gbits/sec  receiver

 

#e.g. change the mtu-value to 9000
ifconfig <your-device> mtu 9000