diff --git a/de/heat-templates/scripts/instance_boot.sh b/de/heat-templates/scripts/instance_boot.sh
index a212b5f..f0e2fa6 100644
--- a/de/heat-templates/scripts/instance_boot.sh
+++ b/de/heat-templates/scripts/instance_boot.sh
@@ -32,7 +32,7 @@
 IRONIC_BAREMETAL_NETWORK=${IRONIC_BAREMETAL_NETWORK:-$ironic_baremetal_network_cidr}
 IRONIC_BAREMETAL_INTERFACE_IP=${IRONIC_BAREMETAL_INTERFACE_IP:-$ironic_baremetal_interface_ip}
 IRONIC_BAREMETAL_NETWORK_NETMASK=$(echo ${IRONIC_BAREMETAL_NETWORK} | cut -d'/' -f2)
-IRONIC_BAREMETAL_INTERFACE=$(ip route get ${IRONIC_BAREMETAL_NETWORK%/*} | awk '/^broadcast / {print $4}')
+IRONIC_BAREMETAL_INTERFACE=$(ip route |grep ${IRONIC_BAREMETAL_NETWORK} | awk '/ src / {print $3}')
 
 IRONIC_BAREMETAL_TUNNEL_NETWORK=${IRONIC_BAREMETAL_TUNNEL_NETWORK:-$ironic_baremetal_tunnel_cidr}
 TUNNEL_INTERFACE_IP=${TUNNEL_INTERFACE_IP:-$tunnel_interface_ip}
@@ -97,7 +97,7 @@
 DEFAULT_INTERFACE=${DEFAULT_INTERFACE:-$(ip route show |awk '/default/ {print $5}')}
 
 if [[ -n ${CONTROL_NETWORK_CIDR} ]]; then
-    CONTROL_IP_ADDRESS=$(ip route get ${CONTROL_NETWORK_CIDR%/*} | head -n1 | fgrep -v ' via ' | awk '/ src / {print $6}')
+    CONTROL_IP_ADDRESS=$(ip route |grep ${CONTROL_NETWORK_CIDR} | head -n1 | fgrep -v ' via ' | awk '/ src / {print $9}')
 else
     CONTROL_IP_ADDRESS=$(get_interface_prefix ${DEFAULT_INTERFACE} | awk -F '/' '{print $1}')
     CONTROL_NETWORK_CIDR=$(ip route show dev ${DEFAULT_INTERFACE} | awk '/kernel/ {print $1}')