Hi, With Hot templates we run into a scaling issue with Neutron trunk subports. The task is to create Neutron trunks with "vlan_count" number of subports, and with stack update be able to add or remove subports of the created trunk. We tried with resourceGroup, and that works well if we increase the number of subports. The problem comes with decrease, as with resourceGroups I can't (my lack of knowledge) tell heat_engine that first update the trunk and remove the subport and after that delete the port. And Neutron API gives back conflict as the port which heat_engine tries to delete is still used by the trunk. Do you know a way to accomplish such an operation with Hot templates? Thanks in advance for the help. Best wishes Lajos Katona (lajoskatona)