Linksys WRT1900AC v2 Slow Upload speed on 22.03.0 stable

Installing and Using OpenWrt
4

Dear,
you have one device with 100mbit lan connection, disable flow control on that lan device (lan2 from log) with ethtool

last post I write solution... install ethtool pkg

Edit...
the best thing is to add a hotplug script on iface

#!/bin/sh

if [ "${ACTION}" = "ifup" ]; then
	if [ "${INTERFACE}" = "lan" ]; then
		logger -t hotplug "Enabling disabling FLOW Control"
		ethtool -A lan2 autoneg on rx on tx on
		ethtool -A lan3 autoneg on rx on tx on
		ethtool -A lan2 autoneg off rx off tx off
		ethtool -A lan3 autoneg off rx off tx off
	fi
fi

modify lan2-3 in case your device with 10-100 is connected to other lan port

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