Tcp Dumps - Dell Force10 S4810P Configuration Manual

Figure 14-19. Mini core text file example
------------------------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
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.

TCP dumps

TCP dump captures CPU bound control plane traffic to improve troubleshooting and system
manageability. When enabled, a TCP dump captures all the packets on the local CPU, as specified in the
CLI.
The traffic capture files can be saved to flash, to FTP, SCP, or TFTP. The files saved on the flash are
located in the
There can be up to 20 Tcpdump_<time_stamp_dir> directories. The file after 20 overwrites the oldest
saved file. The maximum file size for a TCP dump capture is 1MB. When a file reaches 1MB, a new file is
created, up to the specified total number of files.
Maximize the number of packets recorded in a file by specifying the snap-length to capture the file headers
only.
The
tcpdump
capture-duration timer and/or the packet-count counter threshold is met. If no threshold is set, the system
uses a default of 5 minute capture-duration and/or a single 1k file as the stopping point for the dump.
The
capture-duration
when the first of the thresholds is met. That means that even if the duration timer is 9000 seconds, if the
maximum file count parameter is met first, the dumps stop.
374
| S-Series Debugging and Diagnostics
VALID MAGIC
flash://TCP_DUMP_DIR/Tcpdump_<time_stamp_dir>/
CLI has a finite run process. When the command is enabled, it will run until the
timer and the
packet-count
directory, and labeled tcpdump_*.pcap.
counter can be used at the same time. The TCP dump stops