We will be 'upgrading' (or more probably) building a new 6.1 cluster very soon.
Ideally we will build a new cluster on 6.1, then migrate phones, accounts etc across. However, i don't think that the DMA utility runs on CCM3.x
As such, i am considering using the mirrored drive on the Publisher (3.3) to build a temporary 'new' Publisher (standalone). I will then upgrade that to v4.3 with zero risk to the current setup. If this works, i should be able to run the DMA tool and export that info into the NEW Pub on the 6.1 cluster...?
Is this viable? I cant see any other route to easily re-register/licence all our phones. The thought of an upgrade from 3.3 to 4.3 THEN to 6.1 is not an option, the company are not prepared to risk that route lol
All this aside, if (ever! :) i get the licencing sorted out, can i simply use an ICT between the new and old cluster with a route pattern to route calls outside the new cluster to the old cluster?
The old cluster will retain all the calling intelligence and the E1 links too until the migration of phones is complete.
Finally - am i correct in thinking that existing voice vlans should be fine with 6.1, and that all i would need to do to move a phone to the new cluster is manually edit it's TFTP and Default Router settings to register with the 'new' 6.1 cluster...?
Thoughts appreciated. The company is going with a third-party provided migration/new cluster, but i have been tasked with managing the vendor, hence any info greatly appreciated so im sure we aren't being given duff advice by the vendor :o)