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Cisco 1861 is stuck in rommon mode

Hello All,

I have a Cisco 1861, I did try to Upgrde  IOS image. now  The router does not boot up, Does the (bad checksum) error mean the IOS image is corrupted or formated?  I have Backup of my old Image & new Image,

Can anyone help me on this issue ?

Thanks,

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kavinagpur
Asked:
kavinagpur
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1 Solution
 
Istvan KalmarSenior Network EngineerCommented:
if it is corrupted you need to copy back the old image!

If you have CD card reader please copy the old image with CF reader, if not you need:

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bfac.shtml
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kavinagpurAuthor Commented:
Please suggest what is CD card reader & how it use ?
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kavinagpurAuthor Commented:
I can't use Xmodem Console   on Cisco 1861 router
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kavinagpurAuthor Commented:
I'm getting error
rommon 1 > xmodem -r

monitor: command "xmodem" not found
rommon 2 >
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Ahmed Ezzat AbuRayaNetwork Developer EngineerCommented:
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kavinagpurAuthor Commented:
Hi Zo3FoL,

Thanks for your reply,
 
I have plugged cat5 cable also console cable from 1861 to same computer, although I saw LAN cable is unplugged.......... I need it for upload new IOS through TFTP

What should i do for this situation
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Istvan KalmarSenior Network EngineerCommented:
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Istvan KalmarSenior Network EngineerCommented:
xmodem -c c1861-spservicesk9-mz.124-20.T4.bin
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kavinagpurAuthor Commented:
Hi Ikalmar,

I am very upset due to this issue, router didn't take  Xmodem & pls look in help i can't see xmodem in attached list so may be xmodem is not supported on 1800 series..

rommon 9 > xmodem -c c1861-spservicesk9-mz.124-20.T4.bin
monitor: command "xmodem" not found
rommon 10 >
alias               set and display aliases command
boot                boot up an external process
confreg             configuration register utility
cont                continue executing a downloaded image
context             display the context of a loaded image
cookie              display contents of cookie PROM in hex
dev                 list the device table
dir                 List files in directories-dir <directory>
dis                 display instruction stream
frame               print out a selected stack frame
help                monitor builtin command help
history             monitor command history
meminfo             main memory information
more                Concatenate (type) file(s)-more <filenames ...>
repeat              repeat a monitor command
reset               system reset
rommon-pref         Select ROMMON
set                 display the monitor variables
showmon             display currently selected ROM monitor
stack               produce a stack trace
sync                write monitor environment to NVRAM
sysret              print out info from last system return
tftpdnld            tftp image download
unalias             unset an alias
unset               unset a monitor variable
rommon 11 >

Open in new window

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kavinagpurAuthor Commented:
I had to do and what has happened, pls help, i'm in remote location & i don't have CF card reader
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kavinagpurAuthor Commented:
Please help When we are following the steps to create a tftp connection with the remote computer, it appears to be there is no LAN connectivity at all.
Please help how to get my FastEthernet intefaces back running again in ROMMON mode so I can starrt recover my IOS files.

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Ahmed Ezzat AbuRayaNetwork Developer EngineerCommented:
Kindly check this: http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bf9e.shtml

There is an example at the end of the page as well.

HTH
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kavinagpurAuthor Commented:
Hello,

Please try to understand,  it appears to be there is no LAN connectivity at all. even after Connect CAT5 cable between TFTP server & Router  due to that i am unable to follow the steps to create a tftp connection..
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Istvan KalmarSenior Network EngineerCommented:
you need crossover
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kavinagpurAuthor Commented:
Pls suggest step for CF card in rommon mode
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Istvan KalmarSenior Network EngineerCommented:
there is 3 ways:
1 cf card reader
2 tftpdnld
3 xmodem

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kavinagpurAuthor Commented:
Hi ikalmar,

I hope you'll solve my issue
I am doing try with CF card because xmodem is not supported on 1861, &  i am unable to follow the steps to create a tftp connection because it appears to be there is no LAN connectivity at all. even after Connect CAT5 cable between TFTP server & Router. i don't have Crossover cable at the moment that's why i need to use CF, but i got error while using CF.
rommon 18 > boot system usbflash0
boot: unsupported boot device "system"
rommon 19 > boot system usbflash1
boot: unsupported boot device "system"
rommon 20 >
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kavinagpurAuthor Commented:
I alredy told you xmodem  is not supported on it

rommon 30 > xmodem -c c1861-spservicesk9-mz.124-20.T4.bin

monitor: command "xmodem" not found
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Istvan KalmarSenior Network EngineerCommented:
ok do you have CF card reader on your PC?
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kavinagpurAuthor Commented:
yes
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kavinagpurAuthor Commented:
please suggest for next
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Istvan KalmarSenior Network EngineerCommented:
put the CF card into CF reader copy delete the bad image, and copy the new good image!
Put back the CF card to the router

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kavinagpurAuthor Commented:
You means CF card is Flash of router or Flash is different
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Istvan KalmarSenior Network EngineerCommented:
flash of the router...
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kavinagpurAuthor Commented:
Thanks i think we have wasted lot's of time
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kavinagpurAuthor Commented:
Hello,

Unable to yet I think you should understand very well for help me, I hope you will solve my issue.
pls check this
rommon 49 > dev
Devices in device table:
        id  name
    flash:  external compact flash

I entered above & got this, also when i tried to boot flash:c1861-spservicesk9-mz.124-20.T4.bin
Readonly ROMMON initialized
loadprog: error - on file open
boot: cannot load "flash:c1861-adventerprisek9-mz.124-24.T.bin"
because
rommon 1 > Dir flash:

monitor: command "Dir" not found
rommon 2 > dir flash
dir: missing device identifier.
dir: "dir" to get list of devices supporting filesystems.
rommon 3 >

I hope you understand
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