Thanks. I was aware of the cop file and I'm currently in the process of trying to calculate the licenses. So following this general work plan the cluster can be upgraded with little to no downtime? correct
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We are looking to perform an upgrade of our Call Manager cluster from version 8.5.1 to the newest release of 9.1.x, and had some brief questions. I've looked at the upgrade tool at http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a0080b31514.shtml and it doesn't seem to support anything newer then 8.5. The problem is that we are a hospital organization and need to maintain as little to know downtime during the process. The first question with this is during the upgrade instructions it references upgrade instructions for L2 and for a refresh upgrade, for this upgrade do we have to do the refresh upgrade or will the L2 instructions work. The second is what is recommended upgrade steps and what kind of downtime would be associated with it, we currently have 1 publisher and 2 subscriber units. I think the steps should look like this, but I'm not entirely sure. 1.)Install software on publisher. 2.)Install software on each subscriber 3.)Restart publisher completely 4.)Restart 1st subscriber 5.)Restart 2nd subscriber The hope is that the phones would failover to the various nodes during the process, but confirmation with this would be appreciated. Thanks in advanced.
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