A virtual interfaces configuration may be represented by Objectsrepresenting the virtual and the physical network interface instances. HasLowerLayerInterface Referencespoint from the Object(s)representing the virtual interface(s) to the Objectrepresenting the physical interface. All Objectsare of ObjectType IetfBaseNetworkInterfaceType. 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

A link aggregation configuration may be represented by Objectsrepresenting the logical aggregation and the particular physical interface instances. HasLowerLayerInterface Referencespoint from the Object(s)representing the aggregation interface to the Objectsrepresenting the physical interfaces. All Objectsimplement the IIetfBaseNetworkInterfaceType. An example is shown in Figure A-2.

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Figure A-2– Modelling example for link aggregation