Cisco Systems VG204XM, VG202XM manual Using Debug Commands, Error Reporting

Appendix A Using the ROM Monitor

Using Debug Commands

–Ymodem uses CRC-16 error checking to validate each packet. Depending on the device that the software is being downloaded from, this function might not be supported by Xmodem

•destination_file_name—Name of the system image file or the system configuration file. In order for the voice gateway to recognize it, the name of the configuration file must be voice gateway_confg.

Follow these steps to run the xmodem console download command.

Procedure

Step 1 Move the image file to the local drive where Xmodem will execute.

Step 2 Enter the xmodem command.

Error Reporting

Because the ROM monitor console download uses the console to perform the data transfer, when an error occurs during a data transfer, the system only displays the error messages on the console after the data transfer terminates.

If you changed the baud rate from the default rate, the error message is followed by a message telling you to restore the terminal to the baud rate specified in the configuration register.

Using Debug Commands

Most ROM monitor debugging commands are functional only when the Cisco IOS software has crashed or stops. If you enter a debugging command and the Cisco IOS crash information is not available, the system displays the following error message:

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

The following are the ROM monitor debugging commands:

•stack or k—Produces a stack trace; for example:

rommon 6> stack
Stack trace:
PC = 0x801111b0
Frame 00: FP = 0x80005ea8	PC = 0x801111b0
Frame 01: FP = 0x80005eb4	PC = 0x80113694
Frame 02: FP = 0x80005f74	PC = 0x8010eb44
Frame 03: FP = 0x80005f9c	PC = 0x80008118
Frame 04: FP = 0x80005fac	PC = 0x80008064
Frame 05: FP = 0x80005fc4	PC = 0xfff03d70

•context—Displays processor context; for example:

rommon 7> context
CPU	context of the most			recent exception:
PC	= 0x801111b0	MSR =		0x00009032	CR	= 0x53000035	LR	= 0x80113694
CTR	= 0x801065e4	XER =		0xa0006d36	DAR = 0xffffffff		DSISR	= 0xffffffff
DEC	= 0xffffffff	TBU	=	0xffffffff	TBL	= 0xffffffff	IMMR	= 0xffffffff
R0	= 0x00000000	R1	=	0x80005ea8	R2	= 0xffffffff	R3	= 0x00000000
R4	= 0x8fab0d76	R5	=	0x80657d00	R6	= 0x80570000	R7	= 0x80570000
R8	= 0x00000000	R9	=	0x80570000	R10	= 0x0000954c	R11	= 0x00000000
R12	= 0x00000080	R13 =		0xffffffff	R14	= 0xffffffff	R15	= 0xffffffff
Cisco VG202, Cisco VG202XM, Cisco VG204, and Cisco VG204XM Voice Gateways Software Configuration Guide
OL-16191-01									A-7