Reference Guide

344 | Debugging and Diagnostics
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Defaults
Disabled
Command Modes
EXEC Privilege
Command History
Usage Information
The capture-duration timer and the packet-count counter can be used at the same time. The TCP dump
stops 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.
Entering no tcpdump stops the file dump immediately, without waiting for a threshold to be met.
The files saved on the flash are located in the flash://TCP_DUMP_DIR/Tcpdump_<time_stamp_dir>/
directory. The file name is tcpdump_*.pcap. There can be up to 20 Tcpdump_<time_stamp_dir>
directories. If more than 20 files are created, the oldest is overwritten.
Offline Diagnostic Commands
The offline diagnostics test suite is useful for isolating faults and debugging hardware. While tests are
running, FTOS results are saved as a text file (TestReport-SU-X.txt) in the flash directory. This show
file command is available only on master and standby.
Important Points to Remember
• Offline diagnostics can only be run when the unit is offline.
• You can only run offline diagnostics on a unit to which you are connected via console.
• You cannot run diagnostics on a unit to which you are connected via a stacking link.
• Diagnostic results are stored as a text file (TestReport-SU-X.txt) in the flash directory.
• Diagnostics only test connectivity, not the entire data path.
The offline diagnostics commands are:
• diag stack-unit
packet-count
Enter the number of packets to capture. The counter begins as soon as
the command is enabled.
Range: 10-150000
snap-length
Enter the number of bytes per packet to capture. Use this option to
reduce the size of the captured packets, to capture only the needed
headers and avoid rest of the data portion of the packet.
Range: 0-1200
write-to
Enter the location to save the captured packets.
Files can be saved to flash, to FTP, SCP, or TFTP
flash://filepath
ftp://userid:password@hostip/filepath
scp://userid:password@hostip/filepath
tftp://hostip/filepath.
Version 9.0.2.0 Introduced on S6000
Version 8.3.11.1 Introduced on Z9000
Version 8.3.11.5 Introduced on S-Series