diff --git a/libvirt/destroy_configuration.sh b/libvirt/destroy_configuration.sh
index 9b489ad..8444dc4 100755
--- a/libvirt/destroy_configuration.sh
+++ b/libvirt/destroy_configuration.sh
@@ -34,7 +34,8 @@ fi
 configuration_check ${CONFIGURATION}
 destroy_controller ${CONFIGURATION} ${CONTROLLER}
 
-if ([ "$CONFIGURATION" == "controllerstorage" ] || [ "$CONFIGURATION" == "dedicatedstorage" ]); then
+WORK_CFGS="duplex controllerstorage dedicatedstorage"
+if [[ " $WORK_CFGS " == *" $CONFIGURATION "* ]]; then
     for ((i=0; i<=$WORKER_NODES_NUMBER; i++)); do
         destroy_node "worker" ${i} ${CONFIGURATION}
     done
diff --git a/libvirt/setup_configuration.sh b/libvirt/setup_configuration.sh
index 632188e..5a7cfd4 100755
--- a/libvirt/setup_configuration.sh
+++ b/libvirt/setup_configuration.sh
@@ -45,7 +45,8 @@ if [ $? -ne 0 ]; then
     exit 1
 fi
 
-if ([ "$CONFIGURATION" == "controllerstorage" ] || [ "$CONFIGURATION" == "dedicatedstorage" ]); then
+WORK_CFGS="duplex controllerstorage dedicatedstorage"
+if [[ " $WORK_CFGS " == *" $CONFIGURATION "* ]]; then
     for ((i=0; i<=$WORKER_NODES_NUMBER; i++)); do
         create_node "worker" ${i} ${CONFIGURATION} ${BRIDGE_INTERFACE}
         if [ $? -ne 0 ]; then