Installation guide

F-4 Cisco 4000 Series Installation Guide

Entering the ROM Monitor Program

• dir—Lists the ﬁles on the named device, dir device, where the device is ﬂash or

bootﬂash; lists the available ﬁles on that device.

For example:

rommon 11 > dir flash:

File size Checksum File name

2229799 bytes (0x220627) 0x469e C4500-k

Debugging Commands

Most of the debugging commands are functional only when the Cisco IOS software has

crashed or is aborted. If you enter the debug commands and Cisco IOS crash information

is not available, the screen will display the following error message:

“xxx: kernel context state is invalid, can not proceed."

• stack or k—Produces a stack trace.

• context—Displays the processor context.

• frame—Displays an individual stack frame.

• sysret—Displays the return information from the last booted system image. This

includes the reason for terminating the image, a stack dump of up to eight frames, and

if an exception is involved, the address where the exception occurred.

For example:

rommon 8 > sysret

System Return Info:

count: 19, reason: user break

pc:0x60043754, error address: 0x0

Stack Trace:

FP: 0x80007e78, PC: 0x60043754

FP: 0x80007ed8, PC: 0x6001540c

FP: 0x80007ef8, PC: 0x600087f0

FP: 0x80007f18, PC: 0x80008734