Reference Guide

Enabling Application Core Dumps
Application core dumps are disabled by default.
A core dump file can be very large. Due to memory requirements the file can only be sent directly to an
FTP server; it is not stored on the local flash.
To enable full application core dumps, use the following command.
• 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 files are small files
and are written into flash until space is exhausted. When the flash is full, the write process is stopped.
A mini core dump contains critical information in the event of a crash. Mini core dump files are located in
flash:/ (root dir). The application mini core filename format is f10StkUnit<Stack_unit_no>.<Application
name>.acore.mini.txt. The kernel mini core filename format is f10StkUnit<Stack_unit_no>.kcore.mini.txt.
The following are sample filenames.
When a member or standby unit crashes, the mini core file gets uploaded to master unit. When the
master unit crashes, the mini core file 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 -----------------
1078
S5000 Debugging and Diagnostics