IOS upgrdation[urgent]

Unanswered Question
Oct 20th, 2008

Hi All,

I am in the process of upgradaing IOS,

Total size of the flash :32 MB

Size of the current Flash:14 MB

Size of the new proposed flash :20 MB

I know i have to delte the exising flash while upgraaing the new IOS

caN any one tellme the procudeure to upgrade and probelms i may encounter during this change

If any any cisco doc is please suggest me the same

Thanks very much in advacne


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m.sir Mon, 10/20/2008 - 03:29

Yes you are right you need delete current IOS in flash...

If you delete IOS and upgrade fails you still have device running old IOS until your restart the router

I suggest you to backup before you start

1) Current IOS

2) Current configuration

Check the procedure

Last part of this document is workaround what you need to do if after reboot doesnt router come up


Hope that helps rate if it does

mounir.mohamed Mon, 10/20/2008 - 03:35

You can boot the new image via TFTP for testing before delete the current image.

boot system tftp imagename.bin x.x.x.x

make sure your RAM will meet the image req (, also use a secondary boot statement pointing to the current image on the Flash memory.

adhityakarthik Tue, 10/21/2008 - 01:55


Thanjs for update

Could you please le me know in brief means in sterps



bagvanliju Mon, 10/20/2008 - 03:38

Hai Adhi,

you need to delete the ios.try to copy the current ios from flash to tftp.What is the series of router??.check the connectivity between router and TFTP server by pinging...

1)copy the file to TFTP root folder....

2)go to router enable mode Router#delete flash:

3)Now copy ios from TFTP to flash...(make sure router should not get rebooted this time....(if this happend then you will be forced to transfer the ios via console cable ..which will take long time)

after transfering the ios check the config-register value is 0x2102


all the best



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