cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
9829
Views
0
Helpful
30
Replies

Cisco 2811 Stuck in readonly rommon mode

I have a 2811 router and I can not get it to boot properly. I've been troubleshooting it for a few days now but haven't made any progress. I'll start with with I've tried so far and post the output from the commands I have tried.

 

The router was pulled off our rack after we upgraded to a new router. It has a Cisco 128Mb CF card. When I first booted, it went directly into rommon mode. The first thing I tried was the confreg 0x2142 command. After I power cycle the router it just boots back to the same prompt. I setup a TFTP server and tried copying the IOS but kept getting timeout errors. I tried different ethernet cables and both ports ethernet port on the router but no luck. I then tried the xmodem method and changed the serial baud rate 1152000. I left it running overnight and came back to a timeout error. I then found a spare 256MB Sandisk Compact Flash card and tried the TFTP and xmodem methods again but got the same error. I then bought a compact flash card reader and was able to read and format both cards. I copied the contents of the original CF card to my PC then formatted (tried both FAT and FAT32) and put a new IOS on it but it still would not boot. I then put the original files on the SanDisk CF card (tried both FAT and FAT32 again) but still get the same errors. I then found an old 4GB usb memory stick and formatted it then copied a new IOS to it but I can't seem to access the drive using the DIR command. I just ordered a new OEM Cisco 128MB CF card but it probably will not be here till next week. Any information or suggestions would be helpful. Below is the output from the console.

___________________________________________________________________________

 

System Bootstrap, Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2009 by cisco Systems, Inc.

Initializing memory for ECC
..
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled


Readonly ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
open(): Open Error = -66
boot: cannot open "flash:"
boot: cannot determine first executable file name on device "flash:"
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled


Readonly ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
open(): Open Error = -66
boot: cannot open "flash:"
boot: cannot determine first executable file name on device "flash:"
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled


Readonly ROMMON initialized
Entering rommon> prompt after several failed attempts to boot an IOS image.
Please check your internal/external flash drives for the correct IOS image
and issue 'reset' at the rommon> prompt to re-try the boot process.
rommon 1 > confreg 0x2142


You must reset or power cycle for new config to take effect
rommon 2 >

System Bootstrap, Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2009 by cisco Systems, Inc.

Initializing memory for ECC
..
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled


Readonly ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
open(): Open Error = -66
boot: cannot open "flash:"
boot: cannot determine first executable file name on device "flash:"
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled


Readonly ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
open(): Open Error = -66
boot: cannot open "flash:"
boot: cannot determine first executable file name on device "flash:"
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled


Readonly ROMMON initialized
Entering rommon> prompt after several failed attempts to boot an IOS image.
Please check your internal/external flash drives for the correct IOS image
and issue 'reset' at the rommon> prompt to re-try the boot process.
rommon 1 > dev
Devices in device table:
id name
flash: compact flash
bootflash: boot flash
usbflash0: usbflash0
usbflash1: usbflash1
eprom: eprom
rommon 2 > dir flash:
program load complete, entry point: 0x8000f000, size: 0xcb80
open(): Open Error = -66
dir: cannot open device "flash:"
rommon 3 > dir bootflash:
dir: cannot access device "bootflash:"
rommon 4 > dir usbflash0:
program load complete, entry point: 0x8000f000, size: 0x3d240
open(): Open Error = -1
dir: cannot open device "usbflash0:"
rommon 5 > dir usbflash1:
program load complete, entry point: 0x8000f000, size: 0x3d240
open(): Open Error = -1
dir: cannot open device "usbflash1:"
rommon 6 > dir usbflash0:
program load complete, entry point: 0x8000f000, size: 0x3d240
open(): Open Error = -1
dir: cannot open device "usbflash0:"
rommon 7 > dir eprom:
dir: cannot access device "eprom:"
rommon 8 >

30 Replies 30

Kareem55qq
Level 1
Level 1


If any of the above Memory Requirements are
"UNKNOWN", you may be using an unsupported
configuration or there is a software problem and
system operation may be compromised.
Rounded IOMEM up to: 12Mb.
Using 4 percent iomem. [12Mb/256Mb]

Kareem55QQ
Review Cisco Networking for a $25 gift card