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1. Run 'yum update -y'.
2. If you have multiple systems in a cluster (all managed by one Management server), upgrade all the systems as above
3. Reboot (management system first).
4. Log in to the the management UI, go to System -> Servers, select the management server, and press Send Profiles.
5. Reboot each distributed server, and when it is up select it on the servers page and press Send Profiles.

Upgrading directly from 3.10.x

The local domain bind zone is "emptied", if you are using the system as a DNS server, you should copy or backup your zone file before the update. It doesn't effect other zone files on the system, just the one sipx is attached to.

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