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carterdavidJul 26, 2025
Why am I getting a FWM-2-STM_LOOP_DETECT error message on my Cisco Nexus 3000 Switch?
- CChristopher WilkinsonJul 26, 2025
The FWM-2-STM_LOOP_DETECT error on your Cisco Switch typically arises when MAC addresses shift due to incorrect Spanning Tree Protocol (STP)-port state convergence or because the data source is physically relocated across all switches while STP states are converged and correct. To address this, disable MAC learning to safeguard the control plane.
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