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recovery, you can upgrade the BlackBerry Enterprise Server instances and configure high availability instead. When
you configure high availability, you can also configure automatic failover, which permits a standby BlackBerry
Enterprise Server to take over from a primary BlackBerry Enterprise Server without intervention from an
administrator.
If you configured database replication for the BlackBerry Configuration Database, you can continue to use database
replication after the upgrade process completes. However, during the upgrade process, you must turn off database
replication. After the upgrade process completes, you must reconfigure the replicated BlackBerry Configuration
Database manually.
As an alternative to database replication, you can configure database mirroring after the upgrade process completes.
If you configure database mirroring and if you configure the BlackBerry Enterprise Server instances to support
database mirroring, when the principal BlackBerry Configuration Database stops responding, the BlackBerry
Enterprise Server can automatically switch to the mirror BlackBerry Configuration Database without intervention
from an administrator.
For more information about high availability, see the BlackBerry Enterprise Server Planning Guide.
Upgrading a BlackBerry Enterprise Server in a segmented
network
If you distributed the BlackBerry® Enterprise Server components on multiple computers and configured a segmented
network using firewalls as documented in Placing the BlackBerry Enterprise Solution in a segmented network, you
must verify that the components can communicate with each other. You must open the new ports on the firewalls
that the components in the latest BlackBerry Enterprise Server version require. For example, when you upgrade to
BlackBerry Enterprise Server version 5.0, you must open the database port for the BlackBerry Attachment Service so
that it can communicate with the BlackBerry Configuration Database.
In the latest BlackBerry Enterprise Server version, you must expand the segmented network architecture to include
the BlackBerry Administration Service and BlackBerry Monitoring Service. To improve performance of the BlackBerry
Administration Service, you can consider placing the BlackBerry Administration Service in close network proximity
to the BlackBerry Configuration Database.
Upgrading the BlackBerry Enterprise Server in a Wi-Fi
environment
If you upgrade the BlackBerry® Enterprise Server in a Wi-Fi® environment, the upgrade process maintains the WLAN
SRP information and WLAN activation settings that you previously configured. The setup application for the latest
BlackBerry Enterprise Server version does not display the same Wi-Fi dialog boxes as previous setup applications did.
Instead, you can view and change the Wi-Fi settings for the BlackBerry Enterprise Server using the BlackBerry
Configuration Panel.
Upgrade Planning Guide
Upgrading a BlackBerry Enterprise Server in a segmented network
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