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Cisco Bug: CSCvi09472 - aclmgr crashed several times in a L2 loop while moving a link from a 10GE L2 to a 20GE LAG

Last Modified

Aug 13, 2019

Products (34)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3132Q-V Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 92160YC-X Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 3172TQ Switch
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Known Affected Releases

7.0(3)I4(1)

Description (partial)

Symptom:
The 'aclmgr' process crashes several times when a L2 loop was done between two L2 interfaces when moving a L2 link from a 10GE to a 20GE LAG port.

This happened even though storm-control broadcast level 1.50 is configured
<pre>
`show logging nvram`
 
2018 Jan 15 16:18:34.502 sw-2.kirchberg %$ VDC-1 %$ %SYSMGR-2-SERVICE_CRASHED: Service "aclmgr" (PID 17955) hasn't caught signal 6 (core will be saved).  >>>>>>> CORE
2018 Jan 15 16:18:35.407 sw-2.kirchberg %$ VDC-1 %$ %SYSMGR-2-SERVICE_CRASHED: Service "aclmgr" (PID 2803) hasn't caught signal 6 (core will be saved).
2018 Jan 15 16:18:36.105 sw-2.kirchberg %$ VDC-1 %$ %SYSMGR-2-SERVICE_CRASHED: Service "aclmgr" (PID 2828) hasn't caught signal 6 (core will be saved).
2018 Jan 15 16:18:36.856 sw-2.kirchberg %$ VDC-1 %$ %SYSMGR-2-SERVICE_CRASHED: Service "aclmgr" (PID 2832) hasn't caught signal 6 (core will be saved).  >>>>>>>> CORE
2018 Jan 15 16:18:36.858 sw-2.kirchberg %$ VDC-1 %$ %SYSMGR-2-HAP_FAILURE_SUP_RESET: Service "aclmgr" in vdc 1 has had a hap failure
</pre>

And the core file is found with the 'show cores' command:

<pre>
`show cores`
VDC  Module  Instance  Process-name     PID       Date(Year-Month-Day Time)
---  ------  --------  ---------------  --------  -------------------------
1    1       1         aclmgr           2832      2018-01-15 16:18:36
1    1       1         aclmgr           17955     2018-01-15 16:23:18
</pre>

Conditions:
This crash affects Nexus 9K devices
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