diff --git a/scenarios/examples/complex2.yaml b/scenarios/examples/complex2.yaml
index 1a418d4..7bb5855 100644
--- a/scenarios/examples/complex2.yaml
+++ b/scenarios/examples/complex2.yaml
@@ -39,6 +39,7 @@
       -   VNF2vms: out
       -   VNF3:    data1
     default:
+      external:  true
       interfaces: 
       -   VNF2vms: control0
       -   VNF2vms: control1