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Cisco IE 2000 Switch Software Configuration Guide
OL-25866-01
Chapter 46 Troubleshooting
Information for Troubleshooting
Use TDR to diagnose and resolve cabling problems in these situations:
• Replacing a switch
• Setting up a wiring closet
• Troubleshooting a connection between two devices when a link cannot be established or when it is
not operating properly
Crashinfo Files
The crashinfo files save information that helps Cisco technical support representatives to debug
problems that caused the Cisco IOS image to fail (crash). The switch writes the crash information to the
console at the time of the failure. The switch creates two types of c rashinfo files:
• Basic crashinfo file—The switch automatically creates this file the next time you boot up the Cisco
IOS image after the failure.
• Extended crashinfo file—The switch automatically creates this file when the system is failing.
Basic crashinfo Files
The information in the basic file includes the Cisco IOS image name and version that failed, a list of the
processor registers, and other switch-specific information. You can provide this information to the Cisco
technical support representative by using the show tech-support privileged EXEC command.
Basic crashinfo files are kept in this directory on the flash file sy stem:
flash:/crashinfo/.
The filenames are crashinfo_n where n is a sequence n umber.
Each new crashinfo file that is created uses a sequence number that is larger than any previously existing
sequence number, so the file with the largest sequence number describes the most recent failure. Version
numbers are used instead of a timestamp because the switches do not include a real-time clock. You
cannot change the name of the file that the system will use when it creates the file. However, after the
file is created, you can use the rename privileged EXEC command to rename it, but the contents of the
renamed file will not be displayed by the show tech-support privileged EXEC command. You can delete
crashinfo files by using the delete privileged EXEC command.
You can display the most recent basic crashinfo file (that is, the file with the highest sequence number
at the end of its filename) by entering the show tech-support privileged EXEC command. You also can
access the file by using any command that can copy or display files, such as the more or the copy
privileged EXEC command.
Extended crashinfo Files
The switch creates the extended crashinfo file when the system is failing. The information in the
extended file includes additional information that can help determine the cause of the switch failure. You
provide this information to the Cisco technical support representative by manually accessing the file and
using the more or the copy privileged EXEC command.
Extended crashinfo files are kept in this directory on the fla sh file system:
flash:/crashinfo_ext/.
The filenames are crashinfo_ext_n where n is a sequence number.