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Cisco Bug: CSCuj38121 - FWM-2-STM_LOOP_DETECT: Loops detected error message is a false alarm

Last Modified

Feb 21, 2018

Products (2)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3548 Switch

Known Affected Releases

6.0(2)A1(1b)

Description (partial)

Symptom:
Error message"%FWM-2-STM_LOOP_DETECT: Loops detected in the network among ports ... Disabling dynamic learning notifications for 180 seconds" might be seen when a member link restores in the L2 Port-channel, with L3 mcast traffic is running.

Conditions:
with L3 mcast traffic is running, shut then no shut a member link in the L2 port-channel, the error message might happen, it is intermittent.
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