For a network of IP Office servers, you can use either of the following methods:
Single Server Upgrades
Simultaneous Server Upgrades
Upgrading servers one at a time allows resiliency support to users from other servers. The recommended upgrade order is:
Linux-based IP Office Expansion servers.
Secondary server.
Primary server.
IP500 V2 Expansion servers.
If you are confident with the upgrade process, you can run multiple upgrades in parallel using multiple USM upgrade keys or, for virtual machines, multiple copies of the upgrade file.
However, whilst quicker, this removes the option for resiliency support for features between servers.
Reusing the upgrade media
You can reuse the upgrade image to upgrade multiple servers in sequence. However, you must only use an upgrade image to upgrade one server at a time.
Upgrade Warnings
When upgrading IP Office servers in a Server Edition or Select network, you must update each Linux-based IP Office server in the network using the processes in this document.
If Upgrade Available appears in IP Office Web Manager, do not use that option.
If the Consolidate Configuration Entries menu opens in IP Office Web Manager, cancel the menu.
