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• Enable RPM core dumps and specify the Shutdown mode.
CONFIGURATION mode
logging coredump server
To undo this command, use the no logging coredump server command.
Mini Core Dumps
Dell Networking OS supports mini core dumps on the application and kernel crashes. The mini core dump applies to Master, Standby, and
Member units.
Application and kernel mini core dumps are always enabled. The mini core dumps contain the stack space and some other minimal
information that you can use to debug a crash. These les are small les and are written into ash until space is exhausted. When the ash
is full, the write process is stopped.
A mini core dump contains critical information in the event of a crash. Mini core dump les are located in ash:/ (root dir). The application
mini core lename format is f10StkUnit<Stack_unit_no>.<Application name>.acore.mini.txt. The kernel mini core lename format is
f10StkUnit<Stack_unit_no>.kcore.mini.txt. The following are sample lenames.
When a member or standby unit crashes, the mini core le gets uploaded to master unit. When the master unit crashes, the mini core le is
uploaded to new master.
The panic string contains key information regarding the crash. Several panic string types exist, and they are displayed in regular English text
to enable easier understanding of the crash cause.
Example of Application Mini Core Dump Listings
Dell#dir
Directory of flash:/core_dump_dir/FTP_STK_MEMBER
1 drwx 4096 Feb 09 2013 16:07:14 +00:00 .
2 drwx 4096 Feb 09 2013 16:07:12 +00:00 ..
3 -rwx 512 Jan 28 2013 10:42:14 +00:00 f10StkUnit9.kcore.mini.txt
4 -rwx 299829760 Jan 22 2013 23:27:46 +00:00 f10StkUnit9.kcore.gz
5 -rwx 471494 Jan 22 2013 23:40:40 +00:00 f10cp_dsm_130122233423_Stk8.acore.gz
6 -rwx 1626169 Jan 22 2013 23:40:46 +00:00 sysdlp_Stk8.acore.gz
7 -rwx 466916 Jan 22 2013 23:49:34 +00:00 f10cp_dsm_130122234622_Stk9.acore.gz
8 -rwx 512 Jan 30 2013 00:41:10 +00:00 f10StkUnit10.kcore.mini.txt
9 -rwx 512 Jan 30 2013 00:49:38 +00:00 f10StkUnit11.kcore.mini.txt
flash: 2143281152 bytes total (1778053120 bytes free)
Dell#
Example of a Mini Core Text File
VALID MAGIC
-----------------PANIC STRING -----------------
panic string is :<null>
---------------STACK TRACE START---------------
0035d60c <f10_save_mmu+0x120>:
00274f8c <panic+0x144>:
0024e2b0 <db_fncall+0x134>:
0024dee8 <db_command+0x258>:
0024d9c4 <db_command_loop+0xc4>:
002522b0 <db_trap+0x158>:
0026a8d0 <mi_switch+0x1b0>:
0026a00c <bpendtsleep>:
----------------STACK TRACE END----------------
--------------------FREE MEMORY---------------
uvmexp.free = 0x2312
1098
S5000 Debugging and Diagnostics