A simple IOS upgade question

Answered Question
Jan 18th, 2010
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     I have 2851 router running 12.4(4)XC6, I want to upgrde to 12.4-24.T2.  I have both images on my router's flash  I removed the old boot system flash command and created a new one; "boot system flash c2800nm-adventerprisek9-mz.124-24.T2.bin".  When I reboot the router will always return to the 12.4(4)XC6 image.  I'd rather not remove the old code as this is a remote site and it will be a huge problem to get the router restored.  The confreg is set to 0x2102.  Is there a way to force the router to boot to the new image?  Thanks in advance!


dir

Directory of flash:/


    1  -rw-    39715748  Jan 18 2010 10:12:12 -05:00  c2800nm-adventerprisek9-mz.124-4.XC6.bin
    2  -rw-    59455672  Jan 18 2010 15:05:24 -05:00  c2800nm-adventerprisek9-mz.124-24.T2.bin


129748992 bytes total (30572544 bytes free)

Correct Answer by Jon Marshall about 7 years 3 months ago

cbreger_breger wrote:


I've tried all suggestions and saved the config several times, the router continues to come back to the old image.  The commands "show boot or show bootvar" do not work on the router.  Any other ideas?


sh run | i boot
boot-start-marker
boot system flsh:c2800nm-adventerprisek9-mz.124-24.T2.bin
boot-end-marker


Is the above output from the actual router ? if so you have a typo ie. flsh instead of flash


Jon

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Leo Laohoo Mon, 01/18/2010 - 13:04
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Try "boot system flash:c2800nm-adventerprisek9-mz.124-24.T2.bin" OR copy the old IOS to your TFTP, delete the old IOS from the CF and copy the old IOS back.  Make sure the IOS is found BELOW the new IOS.

Jerry Ye Mon, 01/18/2010 - 13:06
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Just did a quick test in my lab routers, and I am able to boot it off the new image while leave the old image in the flash. Here is the show output


Rack1R1#sh ver | i System|Config


Copyright (c) 1986-2009 by Cisco Systems, Inc.
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
System returned to ROM by reload at 20:58:11 UTC Mon Jan 18 2010
System restarted at 21:00:14 UTC Mon Jan 18 2010
System image file is "flash:c2800nm-adventerprisek9-mz.124-15.T10.bin"
Configuration register is 0x2102


Rack1R1#sh run | s boot

boot-start-marker
boot system flash c2800nm-adventerprisek9-mz.124-15.T10.bin
boot-end-marker


Rack1R1#dir
Directory of flash:/


    1  -rw-    53139536  Sep 11 2009 19:38:06 +00:00  c2800nm-adventerprisek9-mz.124-15.T9.bin
    2  -rw-    53185960  Sep 24 2009 18:48:04 +00:00  c2800nm-adventerprisek9-mz.124-15.T10.bin


256471040 bytes total (150142976 bytes free)
Rack1R1#


My question to you is did you do a wri mem before reboot?


Regards,

jerry

kumarkrishnar Mon, 01/18/2010 - 21:00
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Hi,


After config boot commad for new IOS do write mem and check the next boot loader


using show boot or show bootvar


this will display the next ios image if it is psssible u can past the outout here we can validate the same


thank you


regards

krishna kumar

cbreger_breger Tue, 01/19/2010 - 05:37
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I've tried all suggestions and saved the config several times, the router continues to come back to the old image.  The commands "show boot or show bootvar" do not work on the router.  Any other ideas?


sh run | i boot
boot-start-marker
boot system flsh:c2800nm-adventerprisek9-mz.124-24.T2.bin
boot-end-marker

Correct Answer
Jon Marshall Tue, 01/19/2010 - 05:47
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cbreger_breger wrote:


I've tried all suggestions and saved the config several times, the router continues to come back to the old image.  The commands "show boot or show bootvar" do not work on the router.  Any other ideas?


sh run | i boot
boot-start-marker
boot system flsh:c2800nm-adventerprisek9-mz.124-24.T2.bin
boot-end-marker


Is the above output from the actual router ? if so you have a typo ie. flsh instead of flash


Jon

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