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Cisco Bug: CSCur07245 - Nexus switch may see repeated crashes of ntpd process

Last Modified

Mar 13, 2018

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 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases

6.2(8a)

Description (partial)

Symptom:
NTP process may crash repeatedly on a Nexus switch. 

Nexus7010# sh core
VDC  Module  Instance  Process-name     PID       Date(Year-Month-Day Time)
---  ------  --------  ---------------  --------  -------------------------
1    5       1         ntpd             19361     2015-01-31 05:18:22
1    5       1         ntpd             19348     2015-01-31 05:18:22
1    5       1         ntpd             19096     2015-01-31 05:18:22
1    5       1         ntpd             21817     2015-01-31 05:30:25
1    5       1         ntpd             21201     2015-01-31 05:31:20
1    5       1         ntpd             21196     2015-01-31 05:31:20
1    5       1         ntpd             21188     2015-01-31 05:31:20
1    5       1         ntpd             21208     2015-01-31 05:31:21

In some cases the cores may not be properly bundled and will pile up in the /var/sysmgr/tmp_logs directory. This may result in messages similar to the following:

2015 Mar 28 00:34:06.644 Switch %SYSMGR-3-VAR_SYSMGR_FULL: System Manager file storage usage is unexpectedly high at 100%. This may impact system functions.
2015 Mar 28 00:40:29.912 Switch %SYSMGR-2-CORE_SAVE_FAILED: zip_copy_file_to_logflash: PID 24109 with message Failed to copy 0x1201_ntpd_core.30892 to logflash. Error file
 error (srcerr 0x0 dsterr 0x807b001c) . 
2015 Mar 28 00:40:30.057 Switch %SYSMGR-2-CORE_SAVE_FAILED: zip_copy_file_to_logflash: PID 24109 with message Failed to copy 0x1201_ntpd_core.30914 to logflash. Error file
 error (srcerr 0x0 dsterr 0x807b001c) . 
2015 Mar 28 00:40:30.463 Switch %SYSMGR-3-CORE_OP_FAILED: Core operation failed: core_client_run_system_cmd: Command: /isan/bin/sysmgr_logmgr /var/sysmgr/tmp_logs 0 1>> /var/sysmgr/core_handling.log failed wi

Conditions:
This has been observed on Nexus 5000, 6000, and 7000 series switches.

It is more likely to occur if the device is being polled via IPv6 NTP requests. However, this also affects IPv4-only configurations.

It may also be more likely to occur if an unreachable NTP peer is configured.

Related Community Discussions

Nexus 6004 upgrade nightmare
I have now had 2 weekends ruined by a botched ISSU upgrade on 2 pairs of nexus 6004.  We are going from 6.0.2.N2.2 to 7.0.5.N!.1 and each time I encountered a bug.  Last week it was an igmp snooping bug.  Turn off igmp snooping and it will be fine.  So this week I did that and no, it wasnt fine.  I hit a new bug regarding sending BPDUs down dual sided VPCs (ouch).  Thank you very much.  Has anyone else had these kinds of problems with ISSU upgrades?  Im have done 15 pairs of 5ks in the last 2 months...the ...
Latest activity: Apr 19, 2015
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