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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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High-Availability

Redundancy for the Mediation Server role is provided in a similar fashion as with Front End Servers and requires just adding more Mediation Servers to a pool. Load balancing is achieved via DNS load balancing, by providing multiple IP addresses that resolve to the pool name of the Mediation Servers. If one IP address is unavailable, the endpoint will attempt to connect to another IP address provided for the pool in DNS.

Tip

Plan for high-availability in the environment from the start, even if multiple Mediation Servers will not be deployed initially. Completing the planning and configuration for high-availability simplifies the deployment later and requires nearly no changes to the existing infrastructure. Adding high-availability ...

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