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Cisco Bug: CSCvv13665 - 2960x switch members hang on 15.2(7)

Last Modified

Oct 09, 2020

Products (1)

  • Cisco Catalyst 2960-X Series Switches

Known Affected Releases

15.2(7)E

Description (partial)

Symptom:
From the sys logs of the switch we see errors related to PVID inconsistency on internal stack ports.
Jun 10 10:02:36.054: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 592 on StackPort4 VLAN695. 
Jun 10 10:02:36.054: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking StackPort4 on VLAN0695. Inconsistent local vlan. 
Jun 10 10:02:37.012: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking StackPort4 on VLAN0520. Port consistency restored.
Jun 10 10:02:39.001: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 90 on StackPort4 VLAN50. 
Jun 10 10:02:39.001: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking StackPort4 on VLAN0050. Inconsistent local vlan. 

We also see SNMP input queue full, IPC invalid zone and CPU Q starve messages in logs.

Conditions:
Switch is running 15.2(7)
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