...
The wan descriptor application for general scenario is shown as below diagram:
There is a special resource class not shown in the class diagram above, that is configuration. The classes of Wan Descriptor shown above are abstract, we could use them to describe any wan scenario with specify configuration which has the specify parameters for the scenario. For example, we could use overlay vpn configuration an FC to describe overlay vpn. All specify configuration classes are derived from configuration base class which is shown as below diagram:
The specify configuration class will be consumed by specify Direct Graph in SDN-C. As we could import configuration class in SDC and import DG in SDN-C dynamically, new wan scenario could be taught to ONAP after version release.
...
Take the ONAP R1 VoLTE use case as an example. Volte wan contains overlay vpn and underlay vpn, both of them could be described as a FC. And the relationship between overlay vpn and underlay vpn could be described by FCRoute and LinkConnection.
The class diagram of ONAP R1 VoLTE use case shown as below:
