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This section describes how to use the network configuration service to configure add network elements and links into ONOS’ network view. 

Although it is confusingly named, the network configuration service doesn't have much if anything to do with configuring ONOS or the network devices themselves. Rather, it is a way of providing topology and inventory information directly to ONOS. This can supplement or completely replace dynamic device and topology discovery. In many cases, such as data center or enterprise networks, the core network devices and topology may be determined by the organization and stored in an inventory database (for example.) The network configuration service makes it possible to write a program that reads the device and topology inventory from a site-specific database and then provides it directly to ONOS, without having to rely on dynamic device and topology discovery.

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