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Network Assessment Usage Modeling Phase – Part 1October 2013Microsoft corporation
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Modeling process overviewDefining usage modelsDefining personasIdentifying sites, links, usersTypes of Lync traffic in modeling
Bandwidth CalculatorLook and feel
Agenda
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Where are you?
Network Assessment
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Pre-engagemen
t
Tools Logistics
Kick-Off Meeting
Discovery Session
Usage Modelling
RecommendationsTraffic
Simulation
SOW
YOU ARE HER
E
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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
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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?
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“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
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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
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Define usage models
Identify sites, links, and users
ART SCIENCE ART
Identify and define
personas
Calculateand
interpretresults
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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)
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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
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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
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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?
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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
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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
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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
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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
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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)
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Might be significant, but hard to predict
Types of Lync User-Generated Traffic
File transfer
PowerPoint sharing
Conference attachments
Persistent Chat communication
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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
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Lync Bandwidth CalculatorLook and feel
Green
Yellow
…and Grey = formulas or results (locked cells)
Red
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Lync Bandwidth CalculatorLook and feel
Validations
Checks
Comments
Within limits
Within limits, but above threshold
Outside limits
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Lync Bandwidth Calculator
Described in the Start Here tab of the toolClickable buttons
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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.
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