Broadcast Server Operation With Clusters - Nortel 1000 Administration Manual

Chapter 6 Broadcast Server Installation
Overview of Broadcast Server

Broadcast Server Operation with Clusters

Note
72 Application Gateway Administration Guide
Server where it is used to update the distribution list. The Application
Gateway uses the phone extension to locate the associated department
name obtained from the configured LDAP and/or CSV directory sources.
For information on configuring the Application Gateway for the IP/DN
map, see "Specifying a Source for Phone IP-to-DN Mappings," page
In this topic, the term Primary Application Gateway is used to refer to the
last Application Gateway in the cluster that registered with Broadcast
Server. All other Application Gateways in the cluster are referred to as
Secondary Application Gateways. This use of the terms Primary and
Secondary does not imply that clusters support failover for this release.
The Primary Application Gateway (the last server in the cluster that
registers with Broadcast Server) is the one that receives alerts from
Broadcast Server. That Application Gateway then pushes the alert to the
rest of the cluster, the Secondary Application Gateways.
Application Gateway failure impacts Broadcast Server as follows:
When a Secondary Application Gateway in a cluster fails, the phones
•
registered to that Application Gateway will not have access to Voice
Office applications and will not be able to receive pages or broadcasts.
When a Primary Application Gateway fails, communication from
•
Broadcast Server to the cluster is halted until one of the Secondary
Application Gateways re-registers with Broadcast Server. To re-
register an Application Gateway with Broadcast Server, restart the
Application Gateway.
For information on setting up a cluster, see
Gateway Cluster," page
Gateway Release Notes.
34. Cluster capacity is described in the Application
"Creating an Application
46.