CCIE or Null!

My journey to CCIE!

Using the CLI to install and IOS in .tar format.

with 3 comments

Recently I tried updating the IOS of a Catalyst 2960 using it’s web interface (Why I don’t know), but like everything Cisco GUI related (SDM) I had trouble getting it to actually work. The page would just sit their and cycle. So I found myself unable to update the IOS using the GUI. So I extracted the files within the .tar file to flash, told to the switch to boot using the newer IOS then issued the reload command.

Start off by putting the .tar file on your tftp server like any normal IOS upgrade, the key difference here is you want to use the following command:

archive tar /xtract tftp:// flash:

The variables here are the IP Address of the TFTP server and the IOS image file name.

Next you will see the switch extract the files within the .tar file

Extract tar file in flash

The last thing you can see is the .bin IOS file. Now I issue the boot system command:

boot system flash:/c2960-lanbasek9-mz.122-58.SE1/c2960-lanbasek9-mz.122-58.SE1.bin

Note: The contents on the .tar file are extracted into a folder

This tells the switch to boot this particular IOS file. Then after you issue the reload command and the switch boots up you will see the switch loads with the new IOS version.

IOS Version loaded by switch

Written by Stephen J. Occhiogrosso

May 24, 2011 at 8:04 PM

Posted in Cisco

Tagged with , , , ,

3 Responses

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  1. Thank you! This is exactly what I was looking for


    July 11, 2011 at 4:08 PM

  2. Cisco have special command with many options for that

    #archive download-sw ?
    /directory Specify a directory for images
    /force-reload Unconditionally reload system after successful sw upgrade
    /imageonly Load only the IOS image(s)
    /leave-old-sw Leave old sw installed after successful sw upgrade
    /no-set-boot Don’t set BOOT — leave existing boot config alone
    /no-version-check skip version check that prevents incompatible image install
    /overwrite OK to overwrite an existing image
    /reload Reload system (if no unsaved config changes) after
    successful sw upgrade
    /safe Always load before deleting old version
    flash: Image file
    ftp: Image file
    http: Image file
    https: Image file
    rcp: Image file
    scp: Image file
    tftp: Image file


    August 31, 2011 at 10:35 AM

  3. Great post. Thanks a lot!!

    Fred de Gast

    May 19, 2014 at 1:35 AM

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