[modify] make mavvlan take effect by putting this action 20s after NIC setting

update/macvlan.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 
-gateway=`ip route | head -n 1 | grep -Eow '([0-9]{1,3}.){3}[0-9]{1,3}'`
+for i in `seq 3`; do
+    gateway=`ip route | head -n 1 | grep -Eow '([0-9]{1,3}.){3}[0-9]{1,3}'`
+    [[ $gateway == '' ]] && { sleep 3; continue; }
+done
 [[ $gateway == '' ]] && exit 9
 
 num1=`echo $gateway | awk -F '.' '{print $1}'`
@@ -16,7 +19,7 @@ done
  ip link add main2wrt link enp1s0 type macvlan mode bridge
 ip addr add $IP dev main2wrt
 ip link set main2wrt up
-ip route add $IP dev main2wrt
+ip route add 192.168.10.123 dev main2wrt
 
 ip link set main2wrt promisc on