diff --git a/network/scripts/run-os-net-config.sh b/network/scripts/run-os-net-config.sh
index 5df67b78ef..e65f922a4a 100755
--- a/network/scripts/run-os-net-config.sh
+++ b/network/scripts/run-os-net-config.sh
@@ -113,11 +113,17 @@ if [ -n '$network_config' ]; then
     mkdir -p /etc/os-net-config
     # Note these variables come from the calling heat SoftwareConfig
     echo '$network_config' > /etc/os-net-config/config.json
+
+    if [ "$(type -t network_config_hook)" = "function" ]; then
+        network_config_hook
+    fi
+
     sed -i "s/bridge_name/${bridge_name:-''}/" /etc/os-net-config/config.json
     sed -i "s/interface_name/${interface_name:-''}/" /etc/os-net-config/config.json
 
     os-net-config -c /etc/os-net-config/config.json -v --detailed-exit-codes
     RETVAL=$?
+
     if [[ $RETVAL == 2 ]]; then
         ping_metadata_ip