Industrial Ethernet CRC and FCS: Detecting and Locating Bad Frames
Separate CRC calculation, frame FCS and congestion drops. Use receive-counter changes and capture limits to investigate corrupt frames without guessing a failed device.
Industrial Switch VLANs: Access, Trunk, PVID, and 802.1Q Tagging
Learn how access ports, tagged trunks, PVIDs and VLAN membership control forwarding. Check industrial switch VLAN settings with a practical test plan.
Industrial Switch RSTP Rings: BPDUs, Root Election, and Failure Convergence
Understand RSTP root election, port roles and BPDUs. Test ring failures and recovery while checking topology changes and application interruptions.
Industrial Ethernet Auto-Negotiation: Speed, Duplex, and Troubleshooting
Understand Ethernet speed and duplex negotiation. Diagnose forced-setting mismatches, marginal cabling and link-up problems using port status and counters.
How to Read SFP DDM Values for Optical Link Troubleshooting
Read SFP temperature, voltage, bias current and optical power. Compare DDM values with module limits and link measurements to isolate optical faults.
How to Configure Industrial Switch Port Mirroring for Packet Troubleshooting
Configure source ports, mirror directions and a monitor port. Check capture bandwidth and timestamps before using mirrored packets to diagnose industrial traffic.
How to Use LFP on an Industrial Fiber Media Converter: Configuration and Disconnection Testing
Configure Link Fault Pass-through and test copper, fiber, remote power and recovery faults. Check the model-specific direction, alarms and restart behavior.
