Users Guide

Accessing Application Core Dumps
Core dumps for an application crash are enabled by default. On the system, core dumps are generated and stored in the local
flash of the system’s Control Processor CPU. To access an application core-dump file, you must perform an FTP to the Control
Processor CPU flash directory where the application core dump is stored in the following formats:
• An application core dump generated from CP of the RPM:
f10Ch<Chassis ID>_rpm<0/1>_cp_<ProcessName>_<timestamp>.acore.gz
• An application core dump from RP application:
f10Ch<Chassis ID>_rpm<0/1>_rp_<ProcessName>_<timestamp>.acore.gz
• An application core dump from LP application:
f10Ch<Chassis ID>_lp<slot#>_<Process Name>_<timestamp>.acore.gz
• An application core dump generated from LM:
f10Ch<Chassis ID>_lp<slot#>_<Process Name>_<timestamp>.acore.gz
Where cpu specifies a system’s CPU and is one of the following values: cp (Control Processor), rp (Route Processor), lp0 (line-
card processor 0), lp1 (line-card processor 1), or lp2 (line-card processor 2);
application specifies the name of the executable that has crashed;
timestamp is a text string in the format: yymmddhhmmss (YearMonthDayHourMinuteSecond).
You can also configure the system to automatically move (upload) an application core dump to an external FTP server. Use the
logging coredump server server-ip-address username ftp-username password ftp-password command in
global configuration mode to configure an FTP server.
When you enter the logging coredump server command, you are required to enter a password. Use the password of the
FTP server where the core files are to be copied. The password can be up to 15 characters; special characters are allowed. After
you enter the password, an FTP URL is created with the credentials in the operating system. The CLI monitors application core
dumps in the unit.
NOTE
: On the system, when you enable core dumps of application crashes to be uploaded to an FTP server, only core
dumps from the Control Processor are uploaded to the server. Application core-dump files from the Route Processor and
line-card CPUs are moved to flash memory on the Control Processor CPU and can be accessed by performing an FTP to
the Control Processor (CP) core-dump directory:
• The application core-dump file for the Route Processor is stored at: flash:/CORE_DUMP_DIR/
f10rp_application_timestamp.acore.gz
• The application core-dump file for a line-card processor is stored at:flash:/CORE_DUMP_DIR/f10lpslot-
number_application_timestamp.acore.gz
To disable the automatic uploading of application core dumps, enter the no logging coredump server command.
Mini Core Dumps
Dell Networking OS supports mini core dumps for kernel crashes. The mini core dump applies to Master units.
Kernel mini core dumps are always enabled. The mini core dumps contain the stack space and some other very minimal
information that can be used 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://
CORE_DUMP_DIR directory. The kernel mini core filename in the RPM has the following formats:
• Kernel mini core dump generated from CP of the RPMs:
f10Ch<Chassis ID>_rpm<0/1>_cp_<timestamp>.kcore.mini.txt
Debugging and Diagnostics 325