Network Assessment Usage Modeling Phase – Part 1October 2013Microsoft corporation

2

Modeling process overviewDefining usage modelsDefining personasIdentifying sites, links, usersTypes of Lync traffic in modeling

Bandwidth CalculatorLook and feel

Agenda

2

Where are you?

Network Assessment

3

Pre-engagemen

t

Tools Logistics

Kick-Off Meeting

Discovery Session

Usage Modelling

RecommendationsTraffic

Simulation

SOW

YOU ARE HER

E

4

Lync clients can employ different modalities depending on how users actually communicate

Not all users are equal in terms of their working and communication habitsBack office Workers

Typically work from the officeIM and voicePrimarily internal communication

Sales representatives Often work from outside the officeIM, Voice, ConferencingMany interactions with customers (lots of PSTN calls)

Modeling: A Multidimensional Problem

5

To properly estimate the amount of bandwidth Lync might consume on the customers networkUsed as the baseline for the traffic simulation

Customers typically do not know which modalities their users would employ after migrating to Lync, therefore, we need to anticipate (model) that together

Why Is Modeling Necessary?

6

“Art” and “science”

Ask questions

Make assumptions (if necessary)

Discuss and verify with the customer

Use common senseFor example, > 20% talk time in typical enterprise environment is unrealistic.

Look into the futureTrending towards an IM and video world and not and email and voice world

Techniques for Modeling

7

Usage models define how much users are communicating using a specific modality

Personas define groups of users with common communication characteristics and work habits

Sites, links, and users are customer data taken straight from the Data Discovery phase of the network assessment

Modeling As a Process

ART SCIENCE ART

7

Define usage models

Identify sites, links, and users

ART SCIENCE ART

Identify and define

personas

Calculateand

interpretresults

8

Customer facing call(s) typically with same persons as discovery call(s)

Performed after bandwidth modeling is complete

Validate usage models, personas, and resulting bandwidth modeling outcome with the customer

Make sure that the customer understands the outcome of the modeling

Iterative process - customers might have additional insights or decisionsAnother round of calculations and analysis might be neededHelps you to become a trusted advisor

Verification Call(s)

8

9

Usage models define percentage of users using certain Lync modalityfor their communication

Max concurrency

Common across organization

Four levels defined: none, low, medium, highDefault values (start with these)

Typical as seen in modern enterprise deploymentsAdjustments based on organization’s policies (restrict or encourage certain communications methods)

Usage Models

10

Personas represent behavior of classes of users present in a customer’s environment

Up to 10 personas in the tool

Personas are typically independent of location

Characteristics of persona include:Utilization of Lync modalities as defined in usage models: none, low, medium, high

Can be job-related (for example, ”our sales reps make plenty of PSTN voice calls”).Can be related to administrative policy (for example, “video calls are not allowed for vendors in our organization”).

Percentage of users working remotely: 0% – 100%Others factors related to administrative policies or users behavior

Personas

11

Questions that must have answers (from Discovery phase)

Building Usage Models and Personas

How do people work in the organization as of today?

What groups of people can be identified?

What are work habits in these groups?

Are meetings a common way of working?

Is it common for employees to work remotely?

12

Guidelines and impact on bandwidth consumption

Usages and Personas: What Matters?Medium works in most typical scenarios

Change to Low or High if you have specific guideline from the customer

Changing to None has much bigger impactNone is always 0%

Modality Impact Is it really a RTC ?

IM/P * No

Audio Yes

Video Yes

App/Desktop Sharing No(*) except for Central Sites

13

Sites and links that have been identified in the Discovery phase of network assessmentCentral sitesBranch sites

For each siteTotal size of WAN linkAmount of WAN link that might be used by Lync RTC

So what is the RTC? Does the customer have QoS classes?Industry standard – 30%

Internet links (if applicable)

Identifying Sites and Links

14

Users must be identified in each siteTotal user population is not enoughHow many employees and how do they work?

Refer to ”Usage models” and ”Personas”

Don’t forget about non-office or part-time workers

Will there be Hot-desking space or similar scenarios?

Will there be a significant number of guests or vendors?Visitors add to the traffic requirements

Will the sites handle a particularly large number of meetings?

Identifying Users

15

Server-to-serverIntra-pool and SQL BE

Over the LANInter-pool

SIP SignalingData replication for backup pool

User-generatedSignalingMediaContent

Types of Lync Traffic in the ModelingX

15

16

Significant and predictable

Types of Lync User-Generated TrafficSIP signaling (includes presence)

Instant Messaging

Peer-to-peer audio and video

Multiparty audio

Multiparty video

PSTN audio

Desktop/application sharing

YELLOW= primary focus in the NARED = secondary focus in the NA

BLACK = only partially in the NA (only in modeling)

16

17

Might be significant, but hard to predict

Types of Lync User-Generated Traffic

File transfer

PowerPoint sharing

Conference attachments

Persistent Chat communication

17

18

The tool that you would use for Usage Modeling

Requires Microsoft Excel (macros must be enabled)

Requires data gathered earlier and agreed upon with customer

Info on future Lync design or some assumptions must be done

Lync Bandwidth Calculator

19

Lync Bandwidth CalculatorLook and feel

Green

Yellow

…and Grey = formulas or results (locked cells)

Red

20

Lync Bandwidth CalculatorLook and feel

Validations

Checks

Comments

Within limits

Within limits, but above threshold

Outside limits

21

Lync Bandwidth Calculator

Described in the Start Here tab of the toolClickable buttons

22

Lync Bandwidth CalculatorUser Guide

Using the Bandwidth Calculator

Demo

Questions?

© 2013 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. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.