diff --git a/4_provision_networks.sh b/4_provision_networks.sh
new file mode 100755
index 0000000..eb2579c
--- /dev/null
+++ b/4_provision_networks.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+ip link set eth0 promisc on
+
+docker network inspect infra_dev_net >/dev/null 2>&1 || \
+docker network create -d macvlan --subnet 10.99.23.0/24 --gateway 10.99.23.254 -o parent=eth0.23 infra_dev_net
+
+
+docker network inspect dns_local_net >/dev/null 2>&1 || \
+docker network create -d macvlan --subnet 10.200.53.240/28 --gateway 10.200.53.254 -o parent=eth0.53 dns_local_net
+
+docker network inspect pub_dns_net >/dev/null 2>&1 || \
+docker network create -d macvlan --subnet 10.99.153.240/28 --gateway 10.99.153.254 -o parent=eth0.153 pub_dns_net
+
+#docker network create -d macvlan --scope swarm --subnet 10.99.153.240/28 --gateway 10.99.153.254 -o parent=eth0.153 pub_dns_swarm_net
+#docker network create -d ipvlan --subnet=10.99.22.0/24 -o ipvlan_mode=l2 -o parent=eth0.22 infra_dev_net
+
+
+
+# SAMPLE DOCKER RUN WITH NEW NETWORK:
+# docker run --name container1 --net infra_dev_net --ip 10.99.22.11 -dt ubuntu
diff --git a/provision_networks.sh b/provision_networks.sh
deleted file mode 100755
index 6de37e0..0000000
--- a/provision_networks.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-
-ip link set eth0 promisc on
-
-#docker network create -d macvlan --subnet 10.99.22.0/24 --gateway 10.99.22.254 -o parent=eth0.22 infra_dev_net
-#docker network create -d macvlan --subnet 10.200.53.240/28 --gateway 10.200.53.254 -o parent=eth0.53 dns_local_net
-#docker network create -d macvlan --subnet 10.99.153.240/28 --gateway 10.99.153.254 -o parent=eth0.153 pub_dns_net
-docker network create -d macvlan --scope swarm --subnet 10.99.153.240/28 --gateway 10.99.153.254 -o parent=eth0.153 pub_dns_swarm_net
-#docker network create -d ipvlan --subnet=10.99.22.0/24 -o ipvlan_mode=l2 -o parent=eth0.22 infra_dev_net
-
-
-
-# SAMPLE DOCKER RUN WITH NEW NETWORK:
-# docker run --name container1 --net infra_dev_net --ip 10.99.22.11 -dt ubuntu