Guest

Preview Tool

Cisco Bug: CSCur91280 - N5k mst interop with cat6k: 30 sec convergece after TCN

Last Modified

Feb 22, 2018

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N2(5)

Description (partial)

Symptom:
+30sec MSTP convergence due to slow MSTP state transition

In MSTP during a proposal handshake, a port in ALT BLK does not send a BPDU with the agreement flag set. 

This cause the port on other end to go through blocking and learning states.

Conditions:
Problem is observed every time when there is change in topology.
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.