How is everyone? I recently started using the iperf3 tool to check my networking equipment’s performance. Much to my dismay, the results were capped at around 85 megabits. I had a clean install of fedora on both systems and they both had a gigabit NIC. Upon further investigation I discovered the network devices configuration file inside of
/etc/sysconfig/network-scripts/ and changed this line
ETHTOOL_OPTS="autoneg off speed 100 duplex half" to this
ETHTOOL_OPTS="autoneg off speed 1000 duplex full" on both systems. After rebooting the performance was all the way up to 850 megabits. Is this normal for most Linux distributions? I find it unusual that I would encounter the same problem on two unrelated PCs from a decade apart (X99 motherboard and Thinkpad T420).