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S-Series: topology changes and performance issues including Multiple BPDU sources received on a port

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TitleS-Series: topology changes and performance issues including Multiple BPDU sources received on a port
Symptoms
  • Large number of topology changes 
  • Momentary traffic interruptions
  • Seeing local port bpdu looped back on a port constantly
<165>Oct 18 15:03:44 10.233.87.97 Spantree[3]Receive Event: Multiple BPDU sources received on Port = ge.3.26, BPDU Bridge MAC = xx:xx:xx:xx:xx:xx Port = 2695 Prior Bridge MAC = yy:yy:yy:yy:yy:yy Port = 666

<165>Oct 18 15:04:18 10.233.87.97 Spantree[3]Multiple BPDU sources received condition has been cleared for Port = ge.3.26
Environment
  • S-Series
  • MSTP
Cause
address yy:yy:yy:yy:yy:yy is the port mac for this switch and bpdus are received from this on the port as well as from the attached switch
The attached switch is looping frames , including BPDUS
misconfigured 3rd party router looping frames
Resolution
Investigate the device attached to the reporting port as it is either misconfigured or looping
Additional notes

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