Specifications

16 Reference Architecture | Dell
TM
Unified Communication Solution with Microsoft® Lync® Server 2013 for Single Site
Implementation | Version 1.0
enhanced web conferencing experience. In this reference architecture, two OWS servers are deployed to
enable high availability. Table 1 presents a VM resource summary for the Lync Server core architecture.
Table 1 Core Architecture VM Resource Summary
Purpose
VMs
Total Virtual CPU (vCPUs)
Total Memory (GB)
Lync Server 2013 Standard Edition (with
Mediation and Archiving + Monitoring
roles)
2 12
(6 per VM)
64
(32 GB per VM)
Lync Server 2013 Back End for Archiving
+ Monitoring and Persistent Chat (SQL
Server 2012 Standard Edition)
1 4
(4 per VM)
16
(16 GB per VM)
Lync Server 2013 Persistent Chat Server 1 4
(4 per VM)
8
(8 GB per VM)
Office Web Apps Server (OWS) 2 8
(4 per VM)
16
(8 GB per VM)
3.2.1 Network Architecture
A summary of the networking configuration required on the Standard Edition hosts is provided in Figure 3.
Each PowerEdge R620 server provides four 1GbE network connections that are used for redundancy and
to avail the collective bandwidth the host can provide. On the Microsoft Hyper-V host, a converged
network design using Microsoft NIC teaming is used to provide networking connectivity to the virtual
machines. This reference architecture describes only host networking and not the configuration of
individual networking elements used in the reference architecture.
Figure 3 shows, the connectivity of the Lync Front End VMs to the Converged Virtual switch, which
connects to the Converged Network team. The teamed NICs from the hosts connect over 1GbE to the
Dell Networking switches, which are in turn fed into a pair of redundant layer 3 switches for Lync clients
and the media gateways/SBCs for VOIP connectivity.
Figure 3 Network Architecture of Lync Core Server Hosts