Using The Show Controllers Commands; Using The Crashinfo File - Cisco Catalyst 2950 Software Configuration Manual

Using the show controllers Commands

Switch(config)# interface gigabitethernet0/1
Switch(config-if)# auto qos voip cisco-phone
Using the show controllers Commands
You can display the statistics, configuration, and other information about the Catalyst 2950 LRE switch,
the connected CPE devices, and the LRE link. Use the privileged EXEC commands in
display this information:
Table 31-3 Commands for Displaying LRE and CPE Information
show controllers ethernet-controller
interface-id [asic | cpe [port port-id] | phy]
show controllers lre cpe {identity | mfg |
protected | version} [interface-id]
show controllers lre
show controllers lre log
For more information about the fields in the command output, refer to the switch command reference for
this release.

Using the crashinfo File

This feature is available if your switch is running Cisco IOS Release 12.1(11)EA1 or later.
The crashinfo file saves information that helps Cisco technical support representatives to debug
problems that caused the software image to fail (crash). The switch writes the crash information to the
console at the time of the failure, and the file is created the next time you boot the image after the failure
(instead of while the system is failing).
The information in the file includes the software image name and version that failed, a dump of the
processor registers, and a stack trace. You can give this information to the Cisco technical support
representative by using the show tech-support privileged EXEC command.
All crashinfo files are kept in this directory on the flash file system:
flash:/crashinfo/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 stacks or 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 crashinfo file (that is, the file with the highest sequence number at the
end of its filename) by entering the show stacks or 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.
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
31-22
Displays per-interface transmit and receive statistics read from the hardware,
the interface internal registers, and the statistics read from LRE and CPE
ports.
Displays information about the Cisco LRE CPE devices connected to an
LRE switch.
Displays information about the LRE link.
Displays the history of the link, configuration, and timer events for a specific
LRE interface or for all the LRE switch interfaces.
Chapter 31 Troubleshooting
Table 31-3 to
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