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Router boots to Romon

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Router boots to Romon

Postby Guest » Sun Feb 20, 2005 3:23 am


Hi,

I recently upgraded the IOS platform of C871 we use in our network. I forgot to issue the router config command "boot system flash: 'name of file' . When i reloaded the router, it keeps booting to romon.

I've tried using "confreg 0x2102" command in the the Romon environment but to no avail. I've done reset and i am even thinking of booting the router from a tftp server but i dont know how and if it will be possible.

Can someone help me with idea on how to solve this?

Thanks.

Tom

Guest
 

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Re:Router boots to Romon

Postby Guest » Sun Feb 20, 2005 4:27 am


Hi TOM,

try on the romon mode the following:

1- confreg 0x2102

2- reset

after you successfuly configure the router , change the config register to 0x2102 and reload , and boot system flash, the next reload for the router should be from the NVRAM.

HTH

Mohamed

Guest
 

Re:Router boots to Romon

Postby Guest » Sun Feb 20, 2005 5:50 am


Hi Mohammed,

That's the first thing i did, but i didn't work. look at the output i got:

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE                                                      

Technical Support: http://www.cisco.com/techsupport                                                  

Copyright (c) 2006 by cisco Systems, Inc.                                        

C870 series (Board ID: 3-148) platform with 131072 Kbytes of main memory                                                                       

Booting flash:/c870-advsecurityk9-mz.124-24.T1.bin                                                 

ELF Loader: read error                     

Elf loader error               

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE                                                      

Technical Support: http://www.cisco.com/techsupport                                                  

Copyright (c) 2006 by cisco Systems, Inc.                                        

C870 series (Board ID: 3-148) platform with 131072                                                 

Booting flash:/c870-advsecurityk9-mz.124-24.T1.bin                                                 

ELF Loader: read error                     

Elf loader error               

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE                                                      

Technical Support: http://www.cisco.com/techsupport                                                  

Copyright (c) 2006 by cisco Systems, Inc.                                        

C870 series (Board ID: 3-148) platform with 131072 Kbytes of main memory                                                                       

rommon 1 > confreg 0x2102                        

rommon 2 > reset               

rommon 3 >         

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE                                                      

Technical Support: http://www.cisco.com/techsupport                                                  

Copyright (c) 2006 by cisco Systems, In                                     

C870 series (Board ID: 3-148) platform with 131072 Kbytes of main memory

Booting flash:/c870-advsecurityk9-mz.124-24.T1.bin

ELF Loader: read error

Elf loader error

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 2006 by cisco Systems, Inc.

C870 series (Board ID: 3-148) platform with 131072 Kbytes of main memory

Booting flash:/c870-advsecurityk9-mz.124-24.T1.bin

ELF Loader: read error

Elf loader error

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 2006 by cisco Systems, Inc.

C870 series (Board ID: 3-148) platform with 131072 Kbytes of main memory

rommon 1 >

what do you think?

Thanks.

Tom

Guest
 

Re:Router boots to Romon

Postby Guest » Sun Feb 20, 2005 6:15 am


Hi Tom,

Could you try the command " tftpboot " in the romon.

It should thenshow you what you have to enter.

HTH

Mohamed

Guest
 

Re:Router boots to Romon

Postby Guest » Sun Feb 20, 2005 6:58 am


Hi Tom,

What's the flash and DRAM of your router?

Try to download (again) the IOS and use TFTPDNLD to copy the IOS to your router.  I am suspecting that the IOS got corrupted.

How to Download a Software Image to a Cisco 2600 via TFTP Using the tftpdnld ROMMON Command

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bf9e.shtml

Now, here's the interesting part.  You have an c870 router which comes with 2 USB port.  If you have any spare USB flash drive with a maximum size of 2Gb, why don't you copy the IOS from the router to the USB?  Because you have one of the latest bootstrap, you are able to boot the router FROM the USB flash drive.

If you are interested in this option, make sure you format the USB flash drive first before you copy any IOS into it.

Hope this helps.

Guest
 

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