Ethernet port order and status on X86

Installing and Using OpenWrt
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#!/bin/sh /etc/rc.common

START=11

# don't run within buildroot
[ -n "${IPKG_INSTROOT}" ] && return 0

#use busybox grep as GNU grep may be set differently and break the script
grep(){
/bin/busybox 'grep' $@
}

#shutting down all interfaces, then assigning temporary name to free up interface names
#bridges and virtual interfaces are already excluded by  /sys/class/net/*/device/uevent as only physical interfaces have that
for i in $( ls /sys/class/net/*/device/uevent | awk -F'/' '{print $5}' | tr '\n' ' ' ) ;
do

	mac_address=$( grep $i /etc/config/mac-static-interfaces | awk '{print $3}' | tr -d '"' )
	if [ "$mac_address" != '' ]; then
	
		ip link set "$i" down 
		ip link set "$i" name old"$i"
		
	fi
done

for i in $( ls /sys/class/net/*/device/uevent | awk -F'/' '{print $5}' | tr '\n' ' ' ) ;
do

mac_address=$( cat /sys/class/net/$i/address  )
	interface_name=$( grep -i $mac_address /etc/config/mac-static-interfaces | awk '{print $2}' )
	if [ "$interface_name" != '' ]; then
	
		ip link set "$i" down 
		ip link set "$i" name "$interface_name"
		
	fi
done
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