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Figure A.4 – Functional elements of the MMO functional component
A.4.1 Multi-layer orchestration support functional element
The multi-layer orchestration support functional element provides an internal interface to the multi-layer
orchestration support functional element in the ALM, CLM, RLM functional components for requesting and
receiving management operations and associated information for multi-layer orchestration.
A.4.2 Resource layer management orchestration functional element
The RLM orchestration functional element provides orchestration of SDN-RL resources provisioning and
configuration.
A.4.3 Multi-layer management functions orchestration functional element
The MMF orchestration functional element provides functionality for supporting the lifecycle management
of SDN application/network services across the entire SDN operator's domain (e.g., multiple data centers
interconnected by a WAN transport network).
A.4.4 Inter-layer service orchestration functional element
The inter-layer service orchestration functional element provides orchestration of multi-layer resource
management. It coordinates management operations among the SDN-AL, SDN-CL, and SDN-RL, especially the
relationships among virtualized and physical resources across the SDN layers. Some examples of
orchestration realized by this functional element can be:
– orchestration for a multi-layer virtual to physical resource fault correlation;
– orchestration for scale-in and scale-out of control element (e.g., controller instances) depending on
the traffic demand changes in the underlying resource layer, and;
– orchestration for an application layer service provisioning request to resource layer relevant
resources.
A.5 External relationship management functional component
Figure A.5 shows the internal structure of the ERM functional component.
Figure A.5 – Functional elements of the ERM functional component
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