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Cisco Bug: CSCum23974 - n7k: private vlan: root bridge flap

Last Modified

Nov 27, 2020

Products (5)

  • CiscoPro Workgroup EtherSwitch Software
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases


Description (partial)

Root bridge flap for the outside vlan when using private vlan configuration. The priority flap happens between the primary vlan and the secondary 


Nexus 7000----- 6500 

There is a FWSM in the 6500 which is performing the vlan translation

- This condition is seen when the 6500 is running rstp and Nexus rstp
- fwsm is performing transparent bridging
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