All, I am up for a few CallManager upgrades. I am still somewhat new to IP Telephony, so I was wondering if someone could tell me how long a typical upgrade might take? Im upgrading from 4.0(2) to probably 4.1(3). Anyone have any ideas?
Also, If I am upgrading a cluster of 2 CallManagers, would I do the publisher first, reboot it, bring it back online, and then take down the subscriber and upgrade it?
Also, would I take them "offline" before upgrading them?
All, thanks for your patients with me and your time in answering.
On the doc I sent (under Upgrading Publisher) there are some reasonable time estimates for the various segments of the upgrade. I have never done a 4.0(2) to 4.1(3) upgrade but similar ones have gone 4-6 hours. I would always want as long a maintenance window as possible in case you run into any issues. The other thing we usually do is open a TAC Case ahead of time so that you can have an Engineer assigned beforehand (again just in case!)
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The short answer is that you don't.... That isn't entirely true while at
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...