Some IOS releases require a ROMMON upgrade. This example is performed on a Cisco 1841 Router.
The first step is to download the latest ROMMON software:
Official cisco ROMMON download center
The file will be named something like this: C1841_RM2.srec.124-13r.T5
With the #show version command you can check your current version.
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Router>show version Cisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 12.4(15)T9, RELEASE SOFTWARE (fc5) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Tue 28-Apr-09 11:11 by prod_rel_team ROM: System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1) |
We are going to upgrade 12.3 to 12.4, download the ROMMON update and place it on a USB drive (FAT formatted). Plug the USB drive into the C1841 router.
1. Go into the user privileged mode
2.type, upgrade rom-monitor file usbflash0:C1841_RM2.srec.124-13r.T5
The following message will appear:
This command will result in a ‘power-on reset’ of the router!
Continue? [yes/no]:
3. Type, yes and hit enter.
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Router#upgrade rom-monitor file usbflash0:C1841_RM2.srec.124-13r.T5 This command will result in a 'power-on reset' of the router! Continue? [yes/no]: Router#upgrade rom-monitor file usbflash0:C1841_RM2.srec.124-13r.T5 This command will result in a 'power-on reset' of the router! Continue? [yes/no]: yes ROMMON image upgrade in progress. Erasing boot flash eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeeeeeee Programming boot flash ppppppppppp Now Reloading System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1) |
The rommon / bootstrap is now upgraded to Version 12.4
[…] Update ROMMON / Bootstrap […]
Worked like a charm… Thanks!
worked on the first try. thanks
Can any body send me the file? I have tried to download it from Cisco Web Page but I don’t have any contrat to download it. Please Help Me
http://www.mmnt.net/db/0/8/213.141.145.240/pub/Soft/Cisco/IOS/18xx/1841/
Dude, how about login info?
What login info?
You don’t know how to connect to a Cisco switch?