Unrecoverable System Restarts - Cisco Nexus 9000 Series Troubleshooting Manual

Troubleshooting Installations, Upgrades, and Reboots
Command or Action
0x7FFFF2C0: 2AC8C944 000005C1 00000006 2AC735E2 D..*.........5.*
0x7FFFF2D0: 2AC8C92C 2AD721E0 2AAB76F0 00000000 ,..*.!.*.v.*....
0x7FFFF2E0: 7FFFF320 2AC8C920 2AC513F8 7FFFF42C
0x7FFFF2F0: 2AC8E0BB 00000006 7FFFF320 00000000 ...*.... .......
0x7FFFF300: 2AC8DFF8 2AD721E0 08109308 2AC65AFC ...*.!.*.....Z.*
0x7FFFF310: 00000393 2AC6A49C 2AC621CC 2AC513F8 .......*.!.*...*
0x7FFFF320: 00000020 00000000 00000000 00000000
0x7FFFF330: 00000000 00000000 00000000 00000000 ................
0x7FFFF340: 00000000 00000000 00000000 00000000 ................
0x7FFFF350: 00000000 00000000 00000000 00000000 ................
0x7FFFF360: 00000000 00000000 00000000 00000000 ................
0x7FFFF370: 00000000 00000000 00000000 00000000 ................
0x7FFFF380: 00000000 00000000 00000000 00000000 ................
0x7FFFF390: 00000000 00000000 00000000 00000000 ................
0x7FFFF3A0: 00000002 7FFFF3F4 2AAB752D 2AC5154C .
... output abbreviated ...
Stack: 128 bytes. ESP 7FFFF830, TOP 7FFFFCD0
Step 9 switch# system cores tftp: tftp-path
Example:
switch(config)# system cores tftp://10.1.1.1/cores

Unrecoverable System Restarts

An unrecoverable system restart might occur in the following cases:
• A critical process fails and is not restartable.
• A process restarts more times than is allowed by the system configuration.
• A process restarts more frequently than is allowed by the system configuration.
The effect of a process reset is determined by the policy configured for each process. An unrecoverable reset
might cause functionality loss, the active supervisor to restart, a supervisor switchover, or the system to restart.
The show system reset-reason command displays the following information:
• The last four reset-reason codes for a specific module in a given slot. If a module is absent, the reset-reason
• The overall history of when and why expected and unexpected reloads occur.
• The time stamp of when the reset or reload occurred.
• The reason for the reset or reload of a module.
• The service that caused the reset or reload (not always available).
• The software version that was running at the time of the reset or reload.
switch# show system reset-reason module 27
----- reset reason for Supervisor-module 27 (from Supervisor in slot 27) ---
1) At 281000 usecs after Wed Jun 26 20:16:34 2013
codes for that module are not displayed.
Reason: Reset Requested by CLI command reload
... ..*...*,...
...............
Cisco Nexus 9000 Series NX-OS Troubleshooting Guide, Release 7.x
Unrecoverable System Restarts
Purpose
Configures the system to use TFTP to
send the core dump to a TFTP server.
This command causes the system to
enable the automatic copy of core files
to a TFTP server.
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