[c-nsp] Cisco 7206 VXR || Can I use new old IOS with new bootloader

[Mikael Abrahamsson]

On Mon, 21 Sep 2015, Zahid Khan wrote:

> Hi Guys,
>
> I have Cisco 7206 VXR, I upgraded the boot loader and upgraded the
> IOS.Details of which is as below. Suddenly I found that the CPU utilization
> is going very high upto 90%.
>
> Old Bootloader :*c7200-kboot-mz.123-9.bin*
> Old IOS :*c7200-jk9s-mz.124-25d.bin*
>
> New Bootloader:*c7200-kboot-mz.151-4.M10.bin*
> New IOS:*c7200-adventerprisek9-mz.151-4.M10.bin*
>
> Now as a immediate resolution, I want to restore back to old IOS. So my Q
> is, can I reload the router with old IOS without downgrading the bootloader
> or I should downgrade the bootloader and then boot with old IOS.

A newer bootloader can always load an old IOS, so keep your existing boot 
loader, especially with the above versions which are both fairly recent 
(and not 15 years old).

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se