An EN can connect to a NN or two NN can connect dynamically, without defining everything prior to the connection. Following this exchange, parallel LU 6.2 sessions can be established between the control points of the two nodes. This is required between an EN and its NN server and is optional between NNs. Once established, this session is used for sending control information like Topology Updates between nodes . Once the CP-CP session is established, the topology flows across the network interface.
Updates continue to flow as changes occur in the network.
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