How do you implement network diagnostics for industrial Ethernet systems?

Industrial network diagnostics: implement network monitoring (SNMP, port statistics, traffic analysis), configure device diagnostics (EtherNet/IP device status, PROFINET device alarms), set up alerting (latency thresholds, packet loss, device offline). Tools: network management software, protocol analyzers (Wireshark with industrial dissectors), and vendor-specific diagnostics. In PLC: monitor communication status, track message errors, implement timeout detection. In HMI: network health overview, device status display, trend communication quality metrics. Predictive: baseline network behavior, detect anomalies before failure. Document network topology and maintain updated records.