Router 2821 Flash memory replacement

[Ali Bahnam]

Dears,

I have a cisco 2821 router configured as a CME version 7.1.

Now I want to upgrade the IOS to version 15 to get a CME version 8.6 but I faced a problem that the flash of the 2821 is 64MB and the IOS version 15 required flash 128MB.

I tried to replace this flash with another 128MB installed on Cisco 2811 router but when I installed the 128MB flash on the 2821 CME the 2821 didn't boot from it.

Please can you support me in this issue.

Thanks,                 

[paolo bevilacqua]

Connect PC with serial to console port to see what happens with the boot process.

[Ali Bahnam]

I did this on the 2821 router when added the new flash 128MB is enter to rommon.

it didn't boot from the flash.

[Leo Laohoo]

Console into the router and reboot the router.  Post the entire bootup process. 

[Ali Bahnam]

Please I need your advice:-

If I have router with 64MB flash and another with 128MB so can I swap the flash between the two routers??

   Router 64MB   upgrade to 128MB

   Router 128MB  downgrade to 64MB

It is possibe??????

Thanks,

[hmedevil_cisco]

I doubt there would be any issue using a Flash from one in the other. I have done that a thousand of times. Anyway, make sure you format that flash and copy all IOS and CME files (templates, ephone firmware,...) before using it. I have recently migrated from CME 4.1 to CUCME 8.5 without an isue. Just remember to look for changes in IOS commands, phone upgrade process,...etc (for example, new CUCME ios has a great part of the CME files embeded and also features new VoIP security features enabled by default).