diff --git a/environments/undercloud.yaml b/environments/undercloud.yaml
index af87be3ac8..49294ff931 100644
--- a/environments/undercloud.yaml
+++ b/environments/undercloud.yaml
@@ -79,6 +79,7 @@ parameter_defaults:
   TokenExpiration: 14400
   EnablePackageInstall: true
   StackAction: CREATE
+  NetworkDeploymentAction: ['CREATE','UPDATE']
   NeutronTunnelTypes: []
   NeutronBridgeMappings: ctlplane:br-ctlplane
   NeutronAgentExtensions: []