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Scope

The page will discuss and document the necessary yang modules to be supported by O-DU to ensure the end-to-end functionality of the D-Release use case "Closed loop". 

As O-RAN alliance does not provide solid yang models yet, other data models needs to be defined or selected.

Idea

From SMO point of view the O-DU should provide a capability to "manage" the expected NetConf Server connections (O-RAN OpenFronthaul M-Plane) representing O-RUs.

The O-RU will connect via NetConf Call Home/TLS to the O-DU. Therefore the O-DU must be configured in advance with the public key of potential O-RUs.

Exactly this function is implemented by the OpenDaylight project and YANG modules to mimic a potential O1 interface are available.

However, OpenDaylight also supports pre-configured NetConf servers with all its connection related details and NetConf Call Home via SSH. Those parameters and object classes could be ignored for the O-RAN-SC D-Release Use Case.


Minimum parameter set to be supported

The following yang tree shows only a necessary (to be discussed) selection of parameters within the yang capabilities of OpenDaylight forconfiguration and  supervision of NetConf Servers by a NetConf Client (O-DU).

module: network-topology
  +--rw network-topology
     +--rw topology* [topology-id]
        +--rw topology-id          topology-id
        +--rw node* [node-id]
        |  +--rw node-id                                    node-id
        |  +--ro nettop:available-capabilities
        |  |  +--ro nettop:available-capability* []
        |  |     +--ro nettop:capability?          string
        |  |     +--ro nettop:capability-origin?   enumeration
        |  +--ro nettop:unavailable-capabilities
        |  |  +--ro nettop:unavailable-capability* []
        |  |     +--ro nettop:capability?       string
        |  |     +--ro nettop:failure-reason?   enumeration

module: odl-netconf-callhome-server
  +--rw netconf-callhome-server
     +--rw global!
     |  +--rw credentials!
     |  |  +--rw username     string
     |  |  +--rw passwords*   string
     |  +--rw accept-all-ssh-keys?           boolean
     |  +--rw mount-point-naming-strategy?   enumeration
     +--rw allowed-devices
        +--rw device* [unique-id]
           +--rw unique-id                        string
           x--rw ssh-host-key?                    string
           +--rw credentials!
           |  +--rw username     string
           |  +--rw passwords*   string
           +--rw (transport)?
           |  +--:(ssh)
           |  |  +--rw ssh-client-params
           |  |     +--rw host-key       string
           |  |     +--rw credentials!
           |  |        +--rw username     string
           |  |        +--rw passwords*   string
           |  +--:(tls)
           |     +--rw tls-client-params
           |        +--rw certificate-id    string
           |        +--rw key-id            string
           +--ro callhome-status:device-status?   enumeration
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