Network Status: Unexpected loop detected
Phoenix Contact · FL SWITCH 7000
What does 2 mean?
The Device Level Ring (DLR) protocol has identified an unintended redundant path, forming a network loop outside of the designed ring structure. This can lead to broadcast storms, packet duplication, and severe network instability if not resolved.
Common Causes
- Incorrect physical cabling that inadvertently creates an unauthorized loop in the network segment.
- Misconfiguration of a device's DLR ports, causing it to bridge traffic in a way that bypasses the intended ring topology.
- Connection of a non-DLR compliant device or a standard switch incorrectly into the DLR.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Carefully review the physical network topology to identify any unintended cable connections between DLR-enabled devices or connections to external switches.
- 2
Examine the DLR port configurations on all ring participants, ensuring that port roles and settings are correctly assigned and not inadvertently creating bridging loops.
- 3
Disconnect any recently added network devices or cables one by one to isolate the source of the unexpected loop.