mwan3 interface auto restart

mwan3_interface.sh

#!/bin/sh

mwan3 interfaces | awk '{if($4 != "online" && NR > 1) print $2}'  | while read line; do
        if [[ "$line" == "WAN" ]]; then
                echo "------ eth1"
                ip link set eth1 down
                ip link set eth1 up
        elif [[ "$line" == "WAN1" ]];then
                echo "---- veth11"
                ip link set veth11 down
                ip link set veth11 up
        elif [[ "$line" == "WAN2" ]];then
                echo "----- veth12"
                ip link set veth12 down
                ip link set veth12 up
        elif [[ "$line" == "WAN3" ]];then
                echo "---- veth13"
                ip link set veth13 down
                ip link set veth13 up
        fi
done