#!/bin/bash

iface="eth1x1"
iface_new="eth1x2"
iface_temp="eth1x9"
bridge="br1"

brctl delif $bridge $iface
sleep 2

ifconfig $iface 0.0.0.0 down
ifconfig $iface_new 0.0.0.0 down
sleep 2

ip link $iface set name $iface_temp
sleep 2

ip link $iface_new set name $iface
sleep 2

ifconfig $iface 0.0.0.0 up
sleep 2

brctl addif $bridge $iface