A virtual interfaces configuration may be represented by Objectsrepresenting the virtual and the physical network interface instances. Referencespoint from the Object(s)representing the virtual interface(s) to the Objectrepresenting the physical interface. All Objectsimplement the IIetfBaseNetworkInterfaceType. An example is shown in Figure A-1.

Note: The usage of the Referencesis following the YANG modelling approach which is using reference pointers in the YANG-interface nodes to point to other interface nodes in lower or higher layers (“higher-layer-if”, “lower-layer-if”).

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Figure A-1– Modelling Example for virtual network interfaces