Guest

Preview Tool

Cisco Bug: CSCup76759 - Netstack crash triggered switch reload after loop in the network.

Last Modified

Jun 17, 2017

Products (4)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3016 Switch
  • Cisco Nexus 3048 Switch

Known Affected Releases

5.0(3)U3(2)

Description (partial)

Symptom:
Customer's N3k box got reloaded and now looking for the cause of the issue.

Switch is showing the following reset-reason.
`show system reset-reason`
----- reset reason for Supervisor-module 1 (from Supervisor in slot 1) ---
1) At 243278 usecs after Fri Jun 20 00:39:49 2014
Reason: Reset triggered due to HA policy of Reset
Service: netstack hap reset
Version: 5.0(3)U3(2a)

Following core file was generated
`show cores`
Module Instance Process-name PID Date(Year-Month-Day Time)
------ -------- --------------- -------- -------------------------
1 1 netstack 4413 2014-06-20 00:44:48

Conditions:
Checking the upstream devices,  I found there was some STP loop which seems to have triggered the crash.
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.