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SDN-R is able to handle NetConf notification from connected NetConf Servers. To receive NetConf notifications a mountpoint object (network-topology/netconf/node) must exist in MD-SAL and its (clustered-)connection-status must be "connected".

There are in prinipal two ways to create a mountpoint within MD-SAL:

  • via a NetConf or RestConf message
  • via NetConf-Call-Home

The deviceManager component on SDN-R is listening to the connection-status changes for NetConf mountpoints. If the connection-status changes to "connected" the NetConf create-subscription message for netconf notifications is send to the NetConf-server. From now on the NetConf client service is sending NetConf notifications to SDN-R (ODL) devicemanager listener. Every listener on NetConf Notification for this NetConf-Server will trigger the specific handler to process the message.

There are two ODL Listerner interfaces used by devicemanger:

  • ODL Netconf Client related 
    • After subscription of NrtConf notification stream, notifications are forwarded to the listener.
    • Related interface class: org.opendaylight.yang.gen.v1.urn.onf.params.xml.ns.yang.microwave.model.rev170324.MicrowaveModelListener extends org.opendaylight.yangtools.yang.binding.NotificationListener extends java.util.EventListener
  • ODL MDSAL DataTree related
    • After regsitration of the listern, all Data Tree changes of related elements are forwarded to the listerner.
    • Object id for nodes is specified like this: 
      private static final InstanceIdentifier<Node> NETCONF_NODE_TOPO_IID = InstanceIdentifier
       .create(NetworkTopology.class)
       .child(Topology.class, new TopologyKey(new TopologyId(TopologyNetconf.QNAME.getLocalName())))
       .child(Node.class);

    • Related interface class: org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener<Node>

The PNF NetConf Server needs to support capabilites to provide notifications. The related YANG specs are: 

  • <capability>urn:onf:params:xml:ns:yang:microwave-model?module=microwave-model&amp;revision=2017-03-24&amp;features=pure-ethernet,hybrid-microwave</capability>

  • <capability>urn:ietf:params:xml:ns:netconf:notification:1.0?module=notifications&amp;revision=2008-07-14</capability>

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