How to upgrade to CISCO IOS 12.1

[rpgccie]

hi can anyone guide me to replace an old ios image in a 1. read only and

2. read/write flash

in 2500 and 2600 routers

the problem is ive got some old ios runnin in them .. so i need the proper method to replace it with this new image . Thankyou..

[jsivulka]

The procedure to upgrade the IOS in a 2500 is as described at http://www.cisco.com/en/US/partner/products/hw/iad/ps497/products_tech_note09186a0080110d2c.shtml.

For the 2600, refer to

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1831/products_tech_note09186a00800f81f9.shtml

You could also refer to the technical documentation for more version specific upgrade details.

http://www.cisco.com/univercd/home/home.htm

[rpgccie]

im sorry but i dont have a cco login id :(

can anyone help..

[milan.kulik]

Hi,

the same documents are available on:

http://www.cisco.com/warp/public/130/sw_upgrade_proc_flash.pdf

http://www.cisco.com/warp/public/130/sw_upgrade_proc_ram.pdf

http://www.cisco.com/univercd/home/home.htm

without CCO login required.

Regards,

Milan