Reference Architecture 3: Scaled Consolidated Edge (Hardware Load Balanced)


Topic Last Modified: 2012-07-13

In the Edge Server pool topology, two or more Edge Servers are deployed as a load-balanced pool in the perimeter network of the data center. Hardware load balancing is used for traffic to both the external and internal Edge interfaces.

If your organization requires support for more than 15,000 Access Edge service client connections, 1,000 active Web Conferencing service client connections, or 500 concurrent A/V Edge sessions, and high availability of the Edge Server is important, this topology offers the advantages of scalability and failover support.

For simplicity, the Scaled Consolidated Edge Topology (Hardware Load Balanced) figure does not show any Directors deployed but in a real world production deployment they are recommended. For details about the topology for Directors, see Components and Topologies for Director.


For clarity, the .com DNS zone represents the external interface for both reverse proxy and consolidated Edge Servers, and the .net DNS zone refers to the internal interfaces. Depending on how your DNS is configured, both interfaces could be in the same zone (for example, in a split-brain DNS configuration).

Hardware Load Balancer Configuration

For details, see the “Hardware Load Balancer Requirements for A/V Edge” section in Components Required for External User Access.


The Lync Server 2010 update that introduced mobility features – formally known as Cumulative Update for Lync Server 2010: November 2011 – is covered in detail in the Planning Mobility and Deploying Mobility sections. If you are planning to deploy mobility, refer to these topics for important planning and deployment information that will affect your decisions. For details, see Planning for Mobility and Deploying Mobility.

Scaled consolidated edge topology (hardware load balanced)

Scaled Consolidated Edge HLB Topology