UNIs are mapped to OpenFlow ports and are used to connect a CPE device to network services. A UNI cannot be mapped to an OpenFlow port that is already mapped to an SD-WAN interface of the WAN type.
To avoid creating an UNI on each individual CPE device, you can create a UNI in a UNI template and then apply the UNI template to CPE devices when adding or manually registering them. If you edit a UNI in a UNI template, the UNI is automatically modified on all CPE devices that are using this UNI template.
When creating a UNI, a service interface is automatically created for it.