Matrix PRASAR UCS System Manual 1031
The following example illustrates how Redundancy is applied over WAN port of networks.
Let us understand Redundancy over the LAN Port:
• Here, one server is the Primary Server (with Redundancy and other licenses activated), while the other
server is the Backup Server.
• The Primary Server manages the communication, whereas the Backup Server is synchronized and ready
to transit to active state. The Backup Server continuously monitors the health of the Primary Server
through the LAN port. In this case the Primary Server is Active whereas the Backup Server is Standby. All
the configuration and call information is transfered from the Active to Standby Server through this port.
• A Virtual IP is essentially a ‘floating’ IP address that is not linked physically with any one server. It keeps on
switching between the two servers based on their availability, that is it is the IP Address of the Active
Server. When the Primary Server fails, the Backup Server takes control of the functionality through a
Virtual IP. Thus, mature calls stay in progress even when the server in active state gets switched to
standby and vice-versa.
• The client devices — IP Phones, VARTA UC Clients — communicate with the Primary server through the
WAN port. Make sure the Virtual IP Address is configured in all the clients.
Configuring License for Redundancy
PRASAR UCS supports two licenses for Redundancy,
• PRASAR REDUNDANCY SME
• PRASAR REDUNDANCY ENT
Redundancy License is required to support redundancy between two system — the Primary Server and Backup
Server. Make sure Redundancy license is activated in the Primary Server in which you have the other licenses
activated as well. To activate the Redundancy License, refer to “How to activate your License”.
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