`ethtool` script to mitigate Plex buffering specifically on LAN with direct play

21-ethtool

#!/usr/bin/env bash

# SOURCES
# https://forums.plex.tv/t/massive-buffering-solved/155491/11
# https://serverfault.com/a/779496

# USAGE
# vim /etc/NetworkManager/dispatcher.d/21-ethtool
# sudo chmod 751 /etc/NetworkManager/dispatcher.d/21-ethtool
# chown root:root /etc/NetworkManager/dispatcher.d/21-ethtool

# VERIFY
# $ sudo systemctl status NetworkManager-dispatcher
# $ ethtool -k enp3s0
# tx-checksumming: off
# scatter-gather: off
# tcp-segmentation-offload: off

device='enp3s0'

if [ "$1" = "${device}" ] && [ "$2" = "up" ]; then
    /sbin/ethtool --offload ${device} tso off sg off tx off
fi