diff --git a/de/heat-templates/scripts/instance_boot.sh b/de/heat-templates/scripts/instance_boot.sh
index e782161..e064e28 100644
--- a/de/heat-templates/scripts/instance_boot.sh
+++ b/de/heat-templates/scripts/instance_boot.sh
@@ -714,7 +714,7 @@
 if [[ ${NODE_METADATA} == *"tempest"* ]]; then
     for i in {71..76}; do
 cat << EOF >> ${cloud_netplan_cfg}
-            - ${PUBLIC_NODE_IP_ADDRESS#*.}.${i}/${PUBLIC_NODE_IP_NETMASK}
+            - ${PUBLIC_NODE_IP_ADDRESS%.*}.${i}/${PUBLIC_NODE_IP_NETMASK}
 EOF
     done
 fi