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