diff --git a/installers/full_install_osm.sh b/installers/full_install_osm.sh
index 3b57a97..1bed516 100755
--- a/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@ -442,9 +442,9 @@
     fi
 
     if ! grep -Fq "OS_NOTIFIER_URI" $OSM_DOCKER_WORK_DIR/mon.env; then
-        echo "OS_NOTIFIER_URI=http://${DEFAULT_IP}:8662" |sudo tee -a $OSM_DOCKER_WORK_DIR/mon.env
+        echo "OS_NOTIFIER_URI=http://${OSM_DEFAULT_IP}:8662" |sudo tee -a $OSM_DOCKER_WORK_DIR/mon.env
     else
-        sudo sed -i "s|OS_NOTIFIER_URI.*|OS_NOTIFIER_URI=http://$DEFAULT_IP:8662|g" $OSM_DOCKER_WORK_DIR/mon.env
+        sudo sed -i "s|OS_NOTIFIER_URI.*|OS_NOTIFIER_URI=http://$OSM_DEFAULT_IP:8662|g" $OSM_DOCKER_WORK_DIR/mon.env
     fi
 
     if ! grep -Fq "OSMMON_VCA_HOST" $OSM_DOCKER_WORK_DIR/mon.env; then
@@ -724,18 +724,18 @@
     echo "Installing OSM"
 
     echo "Determining IP address of the interface with the default route"
-    DEFAULT_IF=$(ip route list|awk '$1=="default" {print $5; exit}')
-    [ -z "$DEFAULT_IF" ] && DEFAULT_IF=$(route -n |awk '$1~/^0.0.0.0/ {print $8; exit}')
-    [ -z "$DEFAULT_IF" ] && FATAL "Not possible to determine the interface with the default route 0.0.0.0"
-    DEFAULT_IP=`ip -o -4 a s ${DEFAULT_IF} |awk '{split($4,a,"/"); print a[1]; exit}'`
-    [ -z "$DEFAULT_IP" ] && FATAL "Not possible to determine the IP address of the interface with the default route"
+    [ -z "$OSM_DEFAULT_IF" ] && OSM_DEFAULT_IF=$(ip route list|awk '$1=="default" {print $5; exit}')
+    [ -z "$OSM_DEFAULT_IF" ] && OSM_DEFAULT_IF=$(route -n |awk '$1~/^0.0.0.0/ {print $8; exit}')
+    [ -z "$OSM_DEFAULT_IF" ] && FATAL "Not possible to determine the interface with the default route 0.0.0.0"
+    OSM_DEFAULT_IP=`ip -o -4 a s ${OSM_DEFAULT_IF} |awk '{split($4,a,"/"); print a[1]; exit}'`
+    [ -z "$OSM_DEFAULT_IP" ] && FATAL "Not possible to determine the IP address of the interface with the default route"
 
     # configure apt proxy
     [ -n "$APT_PROXY_URL" ] && configure_apt_proxy $APT_PROXY_URL
 
     # if no host is passed in, we need to install lxd/juju, unless explicilty asked not to
     if [ -z "$OSM_VCA_HOST" ] && [ -z "$INSTALL_NOLXD" ] && [ -z "$LXD_CLOUD_FILE" ]; then
-        LXD_INSTALL_OPTS="-D ${OSM_DEVOPS} -i ${DEFAULT_IP} ${DEBUG_INSTALL}"
+        LXD_INSTALL_OPTS="-D ${OSM_DEVOPS} -i ${OSM_DEFAULT_IF} ${DEBUG_INSTALL}"
         [ -n "${OSM_BEHIND_PROXY}" ] && LXD_INSTALL_OPTS="${LXD_INSTALL_OPTS} -P"
         $OSM_DEVOPS/installers/install_lxd.sh ${LXD_INSTALL_OPTS} || FATAL_TRACK lxd "install_lxd.sh failed"
     fi
@@ -756,11 +756,11 @@
     [ ! -d "$OSM_DOCKER_WORK_DIR/osm_pla" -a -n "$INSTALL_PLA" ] && sudo mkdir -p $OSM_DOCKER_WORK_DIR/osm_pla
     sudo cp -b $OSM_DEVOPS/installers/docker/cluster-config.yaml $OSM_DOCKER_WORK_DIR/cluster-config.yaml
 
-    $OSM_DEVOPS/installers/install_kubeadm_cluster.sh -i ${DEFAULT_IP} -d ${OSM_DOCKER_WORK_DIR} -D ${OSM_DEVOPS} ${DEBUG_INSTALL} || \
+    $OSM_DEVOPS/installers/install_kubeadm_cluster.sh -i ${OSM_DEFAULT_IP} -d ${OSM_DOCKER_WORK_DIR} -D ${OSM_DEVOPS} ${DEBUG_INSTALL} || \
     FATAL_TRACK k8scluster "install_kubeadm_cluster.sh failed"
     track k8scluster k8scluster_ok
 
-    JUJU_OPTS="-D ${OSM_DEVOPS} -s ${OSM_STACK_NAME} -i ${DEFAULT_IP} ${DEBUG_INSTALL} ${INSTALL_NOJUJU} ${INSTALL_CACHELXDIMAGES}"
+    JUJU_OPTS="-D ${OSM_DEVOPS} -s ${OSM_STACK_NAME} -i ${OSM_DEFAULT_IP} ${DEBUG_INSTALL} ${INSTALL_NOJUJU} ${INSTALL_CACHELXDIMAGES}"
     [ -n "${OSM_VCA_HOST}" ] && JUJU_OPTS="$JUJU_OPTS -H ${OSM_VCA_HOST}"
     [ -n "${LXD_CLOUD_FILE}" ] && JUJU_OPTS="$JUJU_OPTS -l ${LXD_CLOUD_FILE}"
     [ -n "${LXD_CRED_FILE}" ] && JUJU_OPTS="$JUJU_OPTS -L ${LXD_CRED_FILE}"