Guest

Preview Tool

Cisco Bug: CSCvu10392 - N9K - STP configurations can be different in port-channel and member link.

Last Modified

Jul 16, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

7.0(3)I7(8)

Description (partial)

Symptom:
+ Configuration of port-channel and individual member interfaces allows the user to have separate, mismatched STP modes.

+ This is contradicting the documentation and makes troubleshooting confusing.

Document link: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/interfaces/configuration/guide/b-cisco-nexus-9000-nx-os-interfaces-configuration-guide-93x/b-cisco-nexus-9000-nx-os-interfaces-configuration-guide-93x_chapter_010000.html

Issue directly contradicts this section:

-------
Any configuration changes that you apply to the port channel are applied to each member interface of that port channel. For example, if you configure Spanning Tree Protocol (STP) parameters on the port channel, the Cisco NX-OS software applies those parameters to each interface in the port channel. 
-------

Conditions:
Any Nexus 9k with layer 2 port-channels.
Port-channel interface allows the user to have different STP modes versus the member links.

+ This does not affect STP states as a port-channel interface takes precedence as long as the member links are bundled.
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.