1. Microsoft ® Lync™ Server 2010 Network Assessment Module 14 Microsoft Corporation

2. Session Objectives and Takeaways Session Objectives: Describe the goals of a Network Assessment Discuss and Understand key elements of a Network Assessment Understand how traffic simulation tools are used Demonstrate the Microsoft Lync Server 2010 Bandwidth Planning tool Takeaways: Network Assessment reduces overall project risk Bandwidth Calculator is key for usage modeling 2

3. Agenda Network Assessment Overview Network Assessment – Phase 1: Discovery Network Assessment – Phase 2: Usage Modeling Lync Bandwidth Calculator Overview Lync Bandwidth Calculator Demo Network Assessment – Phase 3: Traffic Simulation Network Assessment – Phase 4: Recommendations Sample Network Assessment Site Reports 3

4. Network Assessment Customer benefits Validates an Enterprise’s Readiness for Unified Communications (UC) Quantitative assessment of current Infrastructure metrics that impact UC Reduces deployment risk Highlights areas that might impact UC readiness 4

5. Network Assessment What is a network assessment? Discovery Session Understand what network environment exists Usage Modeling Model proposed bandwidth using user profiles and usage patterns Traffic Simulation Using a UC Traffic simulator, apply real traffic to production network and monitor factors that affect the quality of UC traffic, Delay, Jitter, and Packet Loss Recommendations Analyze factors affecting quality and produce a full report with recommendations 5

6. Discovery 6

7. Network Assessment Discovery phase: information collection Network Assessment QoS Policies Network Topology Network Utilization Levels Regional WAN Bottlenecks Firewall Architecture Is QoS in place? Is there WAN QoS? Are the WAN SLAs? Max Percentage of links you can reserve for UC Traffic? How many sites to you have? Describe Layer 2 and Layer 3 resiliency. Do you log current utilization levels? Are there multiple WAN providers? Regional bottlenecks? Discuss your firewall architecture e.g. internal firewall and external firewall 7

8. Required Network Information Existing traffic levels on each remote site Max peak level over last 3 months Busy hour average traffic QoS Policies Bandwidth allocations, queuing methods Network Topology Star topology, INTER-SITE links, regional bottlenecks 8

9. Usage Modeling 9

10. Why Do You Need To Understand Usage Model? The point of the network assessment is to generate “realistic” simulated UC traffic You need to collect enough information to know two things: Where do I place my simulation endpoints? How much traffic should I generate? 10

11. Typical Questions How much bandwidth does a call need? Does my WAN have enough bandwidth ? Can I place my conferencing pool overseas? Are there standard usage models? 11

12. Planning Goals Provide WAN impact for branch sites, and WAN impact on data center sites of branch users Provide traffic modeling for use during network engineering Understanding of call flows and bandwidth usage Provide business with information needed for network capacity planning 12

13. Required User Information Number of user per site Modalities in use by those users User usage statistics – if any exist Conferencing usage PSTN usage We provide a starting point if none exist 13

14. Bandwidth – Planning MediaModalityCodecTypical BWMax w/o FECMax w/FEC AudioPeer-to-PeerRTA-W39.86291 AudioPeer-to-PeerRTA-N29.344.856.6 AudioPSTNRTA-N 30.944.856.6 AudioPSTNG.711 64.897161 AudioConferencingG.72246.1100.6164.6 AudioConferencingSiren25.552.668.6 VideoPeer-to-PeerRTV - CIF220260 VideoPeer-to-PeerRTV - VGA508610 VideoPeer-to-PeerRTV - HD12101510 VideoPeer-to-PeerRTV - Pano269360 VideoConferencingRTV - CIF220260 VideoConferencingRTV - VGA508610 VideoConferencingRTV - Pano269360 For planning in a well managed, right-sized network, use Max BW w/o FEC If the network will be constrained and you want to preserve quality, use Max BW with FEC When understanding how much bandwidth at any given time is being used, use the Typical BW numbers. Not for planning, as usage will be greater at times 14

15. What About Application Sharing Traffic? Bandwidth used by application sharing is highly dependent on session content and screen resolution Traffic is bursty in nature Zero in ‘steady state’, spikes On slide transitions, etc. Transmission Control Protocol (TCP) based sessions In-built congestion control End user policy limits available to cap spikes Screen sizeAcceptableOptimal 1280x800384 Kbps1.5 Mbps 1440x900512 Kbps2 Mbps 1680x1050768 Kbps2.75 Mbps 1920x12001 Mbps3.5 Mbps 15

16. Calling Scenarios – Usage Modelling Core call flow scenarios to consider for network planning calculations Conferencing usage Which modalities? Client  MCU PSTN calling Client  Mediation Server Inter-site peer-to-peer Which modalities? 16

17. Bandwidth Calculator 17

18. Output Overview 18

19. Calculator – Input Flow Chart 19

20. Modalities Handled by Bandwidth Calculator SIP signaling: instant messaging, presence subscription and signaling traffic Inter-site peer audio Inter-site peer video Inter-site peer application sharing Conference audio Conference video PSTN audio 20

21. 21 Example Customer for Calculator Demo WAN

22. Demo: Bandwidth Calculator 22

23. Traffic Simulation 23

24. Mapping Lync Media Flows PROBLEM STATEMENT: NetIQ Vivinet Assessor only supports G711, G729 No support for RTAudio / RTVideo Codec simulation SOLUTION: We take the “Total BW” for each Call Flow in the previous step. Calculate how many G711 calls are needed to simulate that value 24

25. Mapping Example We know that G711 (without VAD) is 92Kbps on the Wire. 1800 / 92 = 19 Calls (G711) for Peer Traffic 10,000 / 92 = 108 Calls (G711) for Conferencing Traffic 5,000 / 92 = 54 Calls (G711) for PSTN traffic 25 Peer to Peer (WAN) ConferencingPSTN 1800 Kbps10,000 Kbps5,000 Kbps Endpoint Datacente r Endpoint Site A Endpoint Site B 54 Calls 108 Calls 54 Calls 19 Calls

26. Configuring Tool 26 Endpoint Datacente r Endpoint Site A Endpoint Site B 54 Calls 108 Calls 54 Calls 19 Calls ScenarioEndpoint 1Endpoint 2Number of Calls Conference - Site A SiteADatacenter108 Conf/PSTN - Site BSIteBDatacenter108 PSTN Calls - Site ASiteADatacenter54 PSTN Calls - Site B SIteBDatacenter54 Peer - Site A- Site B SiteASiteB19 Screen Shot from Tool

27. Network Assessment Traffic Simulation Goals Run real UC traffic across your network Ideally for 7 days, 24hrs/day. Collect accurate metrics for factors that affect UC Readiness Delay Packet Loss Jitter Report on metrics on a Per Site, Per Call basis to understand where, and when UC calls were affected by adverse conditions 27

28. Recommendations 28

29. Network Assessment Recommendations Pull together all elements to form a “UC Ready” decision against your current Network Infrastructure Present a full list of areas within your existing infrastructure that might impact UC Examples: No QoS Implemented WAN links under-provisioned for predicted traffic levels Location of proposed Data Center for Lync server 2010 introduces too high a Delay for users in another region (European DC, servicing APAC users) 29

30. Highlights per Site Houston to Runsor Four calls between Houston and Runsor Virtually no variation in delay or call quality 30

31. Highlights per Site Houston to Guatemala Two calls between Houston and Guatemala Huge variable delay during local working hours Unloaded link it suitable for UC Traffic, but requires some type of WAN QoS implemented to deal with traffic prioritization. 31

32. Highlights per Site Shanghai to Toyama Two concurrent calls simulated Huge variable delay during local working hours 32

33. Q&A 33

34. © 2011 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. This document may contain information related to pre-release software, which may be substantially modified before its first commercial release. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION. Unless otherwise noted, the example companies, organizations, products, domain names, e-mail addresses, logos, people, places and events depicted herein are fictitious, and no association with any real company, organization, product, domain name, email address, logo, person, place or event is intended or should be inferred.