We are upgrading CCM 4.1(3) to 6.0(1).
Currently we are running only one Publisher server 4.1(3) with no failover ( Subscriber) configured.
The new config will have 2 servers - one Publisher & another Subscriber. Both the servers will be new hardware, i.ee we are de-commisioning our current hardware box which runs CCM 4.1(3).
So the process will be something like this - Step 1 - > backup 4.1(3) data using DMA.
Step 2 -> Run CUCM 6.0 installation DVD on the new server, format it, then import the DMA data when prompted. The publisher has to be built first.
Step 3-> build the subscriber. it's here that I am a bit confused What's the exact procedure ?
Also, is running Upgrade Assistant required since we are discarding our current hardware box?
No worries, we want to get this right :) The document that you are probably looking at is a reference for replacing an existing 6.x server. I'm not sure this is the proper way to be looking at this. I've also been thinking about your planned method for doing this upgrade and want you to look at the method outlined by great NetPro Shanky in this post (note that his references to 5.x will carry forward for you)
This seems like the most safe and "fool-proof" way to go. This would be the way that I would go for sure!
Have a look,