[cisco-voip] Planning to upgrade CM from 4.2 to 8.0.2

[Ryan Ratliff]

You may want to change that destination version to 8.0(3) since 8.0(2) has been deferred due to CSCtg50662.

-Ryan

On Oct 20, 2010, at 7:04 AM, Amanda Lalli-Cafini wrote:

Good Day All,
 
I have a CM 4.2 (publisher and subscriber) that I need to upgrade to CUCM version 8.
 
I am trying to get my head around the best process to follow.
Prework-  doublecheck the physical hardware will support 8.0.2c.
7835-H2 with 2Gig RAM and 72G hard disk (done)
 
 
1.  Get everything ready to rebuild CM4.2 if necessary
          check the backups
          recovery/installation disks
          
 
2.  Use the DMA tool
     Correct any problems or errors before proceeding.
 
3.  The devices on the network are registered t the subscriber.
     Shutdown subscriber (small outage window) and make sure the devices register with the CM 4.2 publisher.
 
4.  Build a new publisher on test network to 7.1(2)
     The new Publisher server gets the IP address of the current publisher
     Choosing this particular version because I found a Cisco guide for upgrading 4.2(3) to 7.1(2)
 
5.   Migrate the data
 
6.   Check that phones will regiter to new CM 7.2(2) publisher.
 
7.   Upgrade to 8.0.2 and recheck test phones.
 
8.  Plan an outage window to shutdown CM4.2 Publisher and introduce CUCM8.0.2c publisher
 
9  If all goes well, build a new subscriber
 
This will be the first time I am responsible for an upgrade between Windows based CM to Linux Based so it would be really great to hear from people who have done this before.
 
I am most interested in knowing if my plan is basically solid and what are the 'gotchas' that I need to look out for.
 
Thanks very much for any assistance.
 
Regards,
 
Amanda
 
 
Amanda Lalli-Cafini
 
 
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