Guest

Preview Tool

Cisco Bug: CSCvu68040 - C4500 No STP PVID inconsistent state when there is native vlan mismatch

Last Modified

Sep 01, 2020

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases

15.2(5)

Description (partial)

Symptom:
- When there is native vlan mismatch on C4500 and affected port has native VLAN of 1, C4500 does not set involved VLANs to PVID inconsistent state. 
- This may cause a switching loop if affected interface should be blocking in STP. Affected interface will go to designated forwarding status.
- VLAN that is supposed to be native will not increment RX BPDU's on "show spanning-tree detail" output for affected interface.

Conditions:
- First seen on C4500 Sup7-E and Sup8-E
- Native VLAN mismatch
- Affected port has native VLAN of 1
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.