The HasLowerLayerInterface ReferenceType is a concrete ReferenceType and can be used directly. It is a subtype of HierarchicalReferences ReferenceType.

The usage of the References is 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 (“lower-layer-if”, “higher-layer-if”); see also RFC 8343.

Virtual interfaces shall reference their physical interfaces with the HasLowerLayerInterfaceReferenceType. Annex Annex A contains examples for such hierarchical references.

The SourceNode of this ReferenceType shall be an Object organized in the NetworkInterfaces folder.

The TargetNode of this ReferenceType shall be an Object organized in the NetworkInterfaces folder.

The HasLowerLayerInterface ReferenceType is formally defined in Table 54.

Table 54 – HasLowerLayerInterface definition

Attributes

Value

BrowseName

HasLowerLayerInterface

InverseName

HasHigherLayerInterface

Symmetric

False

IsAbstract

False

References

NodeClass

BrowseName

Comment

Subtype of the HierarchicalReferences ReferenceType defined in OPC 10000-5

Conformance Units

BNM IETF Interface Base Info