This is a 3 CM cluster with a MOH server and a CER server. Would would the proper upgrade order be? Publisher, Subscribers, MOH then CER? Do I have to shut down some of the servers while I upgrade the others? Thanks!
a good rule of thumb is to upgrade when you have to or when you need the new features. upgrading just for the sake of upgrading has led to more headaches than necessary. if you do not gain anything from an upgrade, then there sounds like no reason to do it.
if you have multiple registration call managers, you should not need to shut anything down during the upgrade.
order would be as follows:
publisher, tftp-server, subscribers, moh-servers.
on the CER server, (or any servers using CTI/JTAPI), you'll need to run the upgraded callManagers JTAPI client. this will get jtapi on CER in line with the new JTAPI from your ccm upgrade.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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