I'm having a memory cramp here and want to make sure that I'm thinking on the right lines here. I'm upgrading a customer from 4.x to 6.x, I've already verified the server is supported, memory, HD's, so we're good there.
The customer has a PUB and SUB, here's how I'm going to approch the upgrade, let me know if I'm missing something here.
- run upgrade utility to make sure everything is good - on both servers
- install and run DMA on the old 4.x PUB server, record the IP, name, get the files needed on an SFTP server.
- I'm going to put the 4.x SUB on a seperate VLAN that only my PC and the 4.x SUB are on, then let the phones register with the 4.x PUB so they are now working as if the SUB failed.
- I will now run the upgrade on the 4.x SUB and now make it the new 6.x PUB using it's IP, name, etc
- once up and running, services started, license registered and software PAK registered I will unplug the 4.x PUB from the network and plug in the new 6.x PUB
- Once everything comes up I will add the SUB node to the 6.x PUB and install the old 4.x PUB with the 6.x software and make it the new 6.x SUB
Please share any input!
You are most welcome :) If you saw this info from Cisco, it should be good to go! I would ,perhaps, fire up a TAC Case just to verifiy that this method will still fly with a 6.x Migration.
One never knows ;-)