Cisco Systems 3560 Manual De Usuario

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 crashinfo 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. 

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 system: 

flash:/crashinfo/.

The filenames are crashinfo_n where n is a sequence number. 

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. 

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 flash file system:

flash:/crashinfo_ext/.

The filenames are crashinfo_ext_n where n is a sequence number. 

You can configure the switch to not create the extended creashinfo file by using the no exception 
crashinfo global configuration command.