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Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
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Chapter25 Troubleshooting
Using the crashinfo File
For more information about auto-QoS, see the “Configuring Auto-QoS” section on page 23-9.
This example shows how to display the QoS commands that are automatically generated when auto-QoS
is enabled:
Switch# debug auto qos
AutoQoS debugging is on
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet0/17
Switch(config-if)# auto qos voip cisco-phone
Using the crashinfo File
The crashinfo file saves information that helps 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 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.
Step3 interface interface-id Specify the interface that is conne cted to a Cisco IP Phone, and enter
interface configuration mode. You also can specify the uplink interface
that is connected to another switch or router in the interior of the
network.
Step4 auto qos voip {cisco-phone | trust} Enable auto-QoS.
The keywords have these meanings:
•cisco-phone—If the interface is connected to a Cisco IP Phone,
the QoS labels of incoming packets are trusted only when the IP
phone is detected.
•trust—The uplink interface is connected to a trusted switch or
router, and the VoIP classification in the ingress packet is trusted.
Step5 end Return to privileged EXEC mode.
Step6 show auto qos interface interface-id Verify your entries.
This command displays the auto-QoS configuration that was initially
applied; it does not display any user changes to the configuration that
might be in effect.
Command Purpose