Management of the LHCb Online Network Based on SCADA System

LHCb employs two large networks based on Ethernet. One is a data network dedicated for data acquisition, the other one is a control network which connects all devices in LHCb. Sophisticated monitoring of both networks at all levels is essential for the successful operation of the experiment. The network management system is implemented based on a commercial SCADA system (PVSS II). We show here how a large scale network can be monitored and managed using tools originally made for industrial supervisory control.