How to downgrade ASR 903 with RSP-2?

[Karim de Zin El Abidine El Alaoui]

Hello

I would like to know how to perfom a downgrade firmware from ASR 903 with RSP-2.

The case is the router already have been upgraded to a newer version IOS and my purpose is to downgrade also the firmware.

There no documentation about this. How can I downgrade the firmware of all IM (Interfase module) exactly how it was on previouse state (before any Upgrade) ?

Need to retourn to a previsous state to perform somes test.

Thank you.

[Leo Laohoo]

Same as an upgrade.  Copy the IOS into the bootflash, configure the boot variable string (optional), and reboot the chassis.

[Karim de Zin El Abidine El Alaoui]

Hello,

During the IOS upgrade there are some modules interfase (IM) that the hardware are upgraded to a newer firmware version.

I thing that this command is the one to check the version:

show hw-module all fpd

Example:
==== ====================== ====== =============================================
                             H/W   Field Programmable   Current   Min. Required
Slot Card Type               Ver.  Device: "ID-Name"    Version      Version
==== ====================== ====== ================== =========== ==============
 0/0 A900-IMA8S1Z            1.0   32-UEA 8x1G 1x10G     69.22       69.22     
---- ---------------------- ------ ------------------ ----------- --------------
 0/5 A900-IMA8S1Z            1.0   32-UEA 8x1G 1x10G     69.22       69.22     
==== ====================== ====== =============================================

When the IOS upgrade takes place there are some upgrade that RSP need to do with IM.

I not very sure because when I did a upgrade I didn´t cautch the exact information before and after upgrade.

[Karim de Zin El Abidine El Alaoui]

Hello,

Is not the fpd version from the modules (IM, example:A900-IMA8S1Z or A900-IMA2Z ) that is upgraded.

Is something else, because the RSP needed twice reboot before become active.

It´s happening when you upgrade to a uper IOS version, done today and is my conclusion.

This is what I am trying to downgrade because if a repeat this IOS upgrade the RSP card is operative with only one reboot instead of two.