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High CPU Utilization on S-N-K Series with Incomplete LAGs

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TitleHigh CPU Utilization on S-N-K Series with Incomplete LAGs
Symptoms
  • High CPU utilization
  • Two highest processes are Connection Maintenance and Switch Packet Processing
  • MAC moves on the LAG ports
  • LAGs showing "up" and not "dormant" state
  • Sending LACPBPDUs but not receiving LACPBPDUs
Environment
S, N, or K series
One or more multiport LAGs configured
Cause

Incomplete LAG configuration on neighboring device

Resolution
  • Verify LAG configuration on neighboring device is complete
  • If third party be certain is it set for Active and not passive
Additional notes

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