Guest

Preview Tool

Cisco Bug: CSCuo80937 - Nexus 7000 Stuck Sending TCNs Every 2 Seconds

Last Modified

Apr 24, 2020

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

6.2(10)E1 6.2(6)

Description (partial)

Symptom:
If there is any TC after upgrade to 6.2.(6), 6.2.(6a) or 6.2.(8), then after approximately 90 days of active supervisor uptime, STP TC BPDUs are sent out every 2 seconds for a long period of time.

Conditions:
Nexus 7000 or 7700 running 6.2(6), 6.2.(6a), or 6.2(8).

Related Community Discussions

Nexus 7K vPC + spanning-tree topology changes
Hi everyone, hoping to get some help regarding an issue that for me is very strange. I can't seem to wrap my head around it... Ill start describe the enviroment. We currently run two Nexus 7706 as a collapsed core/dist where we connect access switches for Datacenter and Client-network through vPC. Everything works great, no issue reported from customers or other departments and no errors found in either vPC configuration or spanning-tree design, all best practice from Cisco.  So, what is the problem? ...
Latest activity: Nov 19, 2014
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.