Cisco Bug: CSCvt50484 - N7K: Core facing back to back vPC port-channel STP blocking in certain failure scenarios.
Jun 16, 2020
- Cisco Nexus 7000 Series Switches
Known Affected Releases
Symptom: In certain failure scenarios, a vPC port-channel will come up in an STP blocking state and not recover. Conditions: *Back to back vPC. *STP Bridge Assurance is enabled. *Single switch becomes isolated (Core facing vPC, PKA and PL shut). *Re-introduce switch (No shut PKA, PL; wait 60 seconds, no shut core facing vPC) *Core facing vPC will come up in an STP blocking state and not recover. *Issue confirmed in 6.2(24), 7.2(1)D1(1) and presumably all earlier versions but not confirmed. *Issue does not occur on 7.3(5)D1(1).
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Bug Details Include
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