DELL S50V User Manual

E-Series TeraScale Debugging and Diagnostics | 1219

Kernel core dump—The E-Series supports kernel core dumps for CP and for RP1/RP2 using a naming 
convention of 

.

RP kernel core dumps are enabled by default.   New files are written in flash until space is exhausted, in 
which case the write is aborted.

CP kernel core dumps are disabled by default. Enable them using the command 

 

 from 

CONFIGURATION mode. If you use the keyword 

 with this command, the system creates a file, named 

f10cp.kcore.gz, that preserves space on the internal flash so that there is always enough space for a core 
dump. Undoing this command using the 

 removes this file. The CP kernel core 

dumps are overwritten every time there is a new core dump. You should manually upload kernel core 
dumps periodically if you want to save this information.

You may choose to write the core dump directly to an FTP server using the keyword 

. However, the 

server option supports only RP coredumps; it does not support CP coredumps. By default the kernel core 
dump is sent to the root directory of the internal flash CP and the CORE_DUMP_DIR directory for RP.

Application core dump—On the E-Series, the application core dump has the file name format 
f10{cp|rp{1|2}}<yymmddhhmmss>.acore.gz, where <yymmddhhmmss> is a time stamp, and FTOS writes 
it to the internal flash.

The FTOS High Availability module is aware of the core dump upload, and it does not reboot the crashed 
RPM until the core dump has completed or is aborted.

Line card core dumps preserve critical status information for cards which experience a task crash. 

Writing a line card core dump to memory on the RPM requires 5 to 30 minutes.  During this time, the 
physical interfaces remain in their current state, which is normally operationally up. This behavior assumes 
that most FTOS agent tasks running on the line card CPU continue to operate correctly and that you want 
to maximize uptime by having packets continue to flow while FTOS writes the core dump.     

If you want to failover to a redundant system when a line card exception occurs, use the command 

 (Figure 663) to shut down ports during a core dump so that the backup 

system can take over.

Note: The kernel core dump can be large and may take up to 5 to 30 minutes to upload. FTOS does not 
overwrite application core dumps, so you should delete them as necessary to conserve space on the flash; 
if the flash is out of memory, the core dump is aborted. On the S-Series, if the FTP server is not reachable, 
the application core dump is aborted.

Message 21  Task Crash Detection

%E48TF:0 %TME-2-TASK SUSPENDED: LINECARD TASK SUSPENDED. SAVING FAILURE  RECORD IN PROGRESS