[c-nsp] CRS1 downgrade from 4.0.1 to 3.6.2

[Vikas Sharma]

Ok,

I have downgraded the XR, thanks Mikael /all.

Steps followed

1- Copy vm file to disk1

then

@ Stanby RP >>>>
unset BOOT
confreg 0x102
sync
reset

@ primary RP >>>
unset BOOT
TURBOBOOT=on,disk0,format
sync
boot disk1:comp-hfr-mini.vm-3.6.2
Regards,
Vikas
On Fri, Feb 25, 2011 at 8:10 PM, Vikas Sharma <vikassharmas at gmail.com>wrote:

> Hi Mikael,
>
> There is a process to downgrade, but it is not working for me
>
>
> http://www.cisco.com/web/Cisco_IOS_XR_Software/pdf/CRS-1_Upgrade_Procedure_3_6_x_4_0_0_to_401-3.pdf
>
> I have 3.6.2 in production network and I want to move to 4.0.1 due to some
> really "GOOD" feature availability. I also think the last option is
> turboboot, if I do not find any other way to downgrade.
>
> Regards,
> Vikas
>
>   On Fri, Feb 25, 2011 at 5:35 PM, Mikael Abrahamsson <swmike at swm.pp.se>wrote:
>
>> On Fri, 25 Feb 2011, Vikas Sharma wrote:
>>
>> Hi,
>>>
>>> I have upgraded CRS1 to 4.0.1 from 3.6.2. Upgrade worked fine and it is
>>> running 4.0.1. But the issue is I am not able to downgrade it back to
>>> 3.6.2
>>>
>>
>> I believe the release notes say that when you've finished upgrading to
>> 4.0.x and removed the upgrade package, you cannot downgrade again.
>>
>> If you want to go back to 3.6.2 you have to Turboboot that image including
>> recommended reformat of the flash drives to FAT16.
>>
>> Perhaps when you do this, you might as well go to 3.8.x instead of the now
>> (afaik) unsupported 3.6.2?
>>
>> --
>> Mikael Abrahamsson    email: swmike at swm.pp.se
>>
>
>