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FAQ - Enterprise Server Clustered
You can either click on a question to take you directly to the answer or scroll through to read all of them.
Clustering allows the use of automatic failover from one server to another server that has been specifically designed for this task. Back to top
2. How is logging done during a failover? (i.e., if the first node crashes, does it record anything to the BlackBerry Enterprise Server log to let me know this? If so what?)
In the event of primary node fail over, initiated (for example, due to loss of power on the primary node) provided the BlackBerry Enterprise Server service is in stand-by mode on the secondary node, failover is automatic. The logging for the secondary node will show the failover taking place at that time, and the secondary node takes over typical logging (BlackBerry Infrastructure pings, mail redirection, etc). When the problem on the primary node is addressed, and you want it to resume processing, you must initiate failback. Back to top
3. How do I initiate failback if I've fixed the problem with node 1 and want the system to return to the original state?
Once the primary node is operational, to allow it to resume processing, bring
it back online:
There is a slight delay while all users are started. This delay does not occur with failover, because the secondary node has started everything but the SRP connection. Back to top
4. What requirements are there for the clustered server solution?
The BlackBerry Enterprise Server for a clustered environment requires the following
hardware and software components:
Hardware: PC with an Intel® Pentium® processor or compatible (233 MHz
or higher, 128 MB RAM, 1 GB hard drive), and cluster server nodes compatible with
Microsoft's cluster service specifications
Software: BlackBerry Enterprise Server works in Microsoft Exchange 5.5 or higher
environments.
There should be two cluster server nodes with the following software:
 | Windows NT 4.0 Server Enterprise Edition |
| Microsoft Exchange Administrator 5.5 (with Microsoft Exchange Service Pack 4 installed), with access to the Microsoft Exchange server |
WARNING: If you install Microsoft Exchange Administrator on a new cluster server, on each node, you must run it and connect to a Microsoft Exchange server in the same site in which you will be installing the BlackBerry Enterprise Server.
WARNING: You MUST install the BlackBerry Enterprise Server on both the primary and secondary node. Once the install is complete on both nodes, you MUST start the primary node (using Cluster Administrator) BEFORE starting the secondary node. Otherwise, both nodes will attempt SRP connections, resulting in authentication errors.
| Microsoft Outlook should not be installed on the BlackBerry Enterprise Server machine. This is an unsupported configuration. |
| Microsoft Exchange Administrator's MAPI and CDO subsystems are required for a BlackBerry Enterprise Server 2.1 environment |
| Before installing BlackBerry Enterprise Server, you must install the
CDO.dll hotfix for Microsoft Product Support Services Knowledge Base article
Q289606. You can download the hotfix and obtain information on the Knowledge
Base article from: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=29085 |
| Note: | The corporate firewall must be able to resolve Internet addresses using DNS. |
Firewall Configuration: The BlackBerry Enterprise Server initiates connections to the wireless network in an outbound direction. To support BlackBerry in an environment with a firewall in place, you must configure the firewall to allow the computers running the BlackBerry Enterprise Server within the company to initiate TCP/IP connections to an outside server listening on port 3101. If you use a proxying firewall, the proxy must be transparent.
Note: |
A transparent proxy does NOT modify requests or responses through the proxy during proxy authentication and identification, whereas a non-transparent proxy (where the client specifies the hostname and port number of the proxy) IS used to modify requests or responses through the proxy. If you have a non-transparent proxy, the BlackBerry Enterprise Server can be configured to access an internal proxy address, which is then translated externally to the SRP Host on port 3101. Back to top |
5. How does this benefit my organization?
The advantage to clustered servers is the ability to continue the BlackBerry Enterprise Server even in the event of hardware failure. This allows for 7 days a week, 24-hour continual service without interruption. Back to top
6. Does one license cover both nodes of a clustered system?
Yes. Back to top
7. Can a clustered server support more users then a regular BlackBerry Enterprise Server?
No, the clustered server operates in the same fashion in that only one node is functional at a time. The advantage to clustered servers is the automatic fail over abilities allowing for uninterrupted administration of the service even in the event of hardware failure. Back to top