diff --git a/environments/undercloud.yaml b/environments/undercloud.yaml
index 25260f6339..143e25c080 100644
--- a/environments/undercloud.yaml
+++ b/environments/undercloud.yaml
@@ -86,6 +86,7 @@ parameter_defaults:
   TokenExpiration: 14400
   EnablePackageInstall: true
   StackAction: CREATE
+  NetworkDeploymentActions: ['CREATE','UPDATE']
   SoftwareConfigTransport: POLL_SERVER_HEAT
   NeutronTunnelTypes: []
   NeutronBridgeMappings: ctlplane:br-ctlplane