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Multimedia Network
INTRODUCTION TO OPNET
ttp: ce.s ar .e u courses - ce -Instructor : Dr. Hamid R.
Rabiee
Spring 2012
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Assignment policy Assignment duration
1 week
Assignment deliverables
Defined per assignment
Email address: [email protected]
ss gnment presentat on Class discussion
Final project presentation
Assignment grading
Tentative
Team work
Groups for final project (probably 2 member groups)
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RoadmapWorking with 3
levels of protocols stack:
1. Application Layer:
Defining services with Different SLAs.
3. Network layer: Routing protocols, IP, ICMP,..
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Roadmap (cont) Opnet 14.5
Should be installed on Windows XP (Vmware probably!)
Course project
Goal: Computer Department Network
topology
# of users estimation Different User type
services
Traffic modeling (MRTGs)
QOS
Failure analysis
Capacity planning
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Previous term project
Sharif Campus Network Design
Not a unique solution Several groups, several methodologies,
different
designs
Lets take a look at it
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Network TopologySharif network topology is available at:
http://cc.sharif.ir/web/guest/32
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Defining the Projects Stages
Network
services
and theirSLA
Traffic
Matrix
Network
topology
Routing
Protocols
Methodology CapacityPlanning
Failure
Analysis
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Network Topology (cont)
Google Earth
Latitude, Logtitude
PoP points
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Network Services & Their SLA
Goal of a network
What services do we need?What Quality of Service do each
require?
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Campus Network Service
Email
HTTP
Database
Video Conferencing
Voice Conferencing
FTP
Reference
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Simulation Methodology
Traffic Matrix
# of Users Users behavioral pattern
Define traffic flows - MRTG
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Traffic Matrix - # of Users
# of Dormitory Students (in each dorm)
# of Staff (in each office)
# of professors (in each department)
# of PHDs students (in each department)
# of MSc students (in each department)
# of BSc students (in each department)
Reference [3] : http://stu.sharif.ir/
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Traffic Matrix Defining Traffic Flows
MRTGs : Traffic from Departments or Offices to
Core Router and Core Switch
3 range of time
Upload & Download Traffic
Reference httplogssharifirgraphs
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Traffic Matrix OPNET
Define Flow from each Department and Office
Export a spreadsheetWrite into spreadsheet
Import to OPNET
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Capacity Planning
Why is it needed?
network resource demand increasing over time
More usersmore demands
More applications providedmore demands & BW
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Capacity Planning SLA Violation
Violation
End2End Delay
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Capacity Planning OPNET Capacity PlanningUse OPNET to forecast
traffic volume
Core Router Core Switch
Core Router Internet
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Failure AnalysisOne important requirement of networks
Resiliency against failures
Check network in different failure scenarios
OPNET survivability analysis tool
Define network bottlenecks & critical links or routers Use
redundancy in order to decrease failure effect
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ExampleEffective link : Core Router Core Switch
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Summary SP Guru proactively predicts performance of your network
to
help with
Capacity planning Technology migration
Identifying network configuration errors
Load balancing
Physical and logical topology design
Failure Analysis
The ability to conduct these studies quickly and accurately
helps
Reduce capital and operational expenditures
Minimize the impact of outages
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assignmentsOpnet installation
LAB1
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Take-Away Points
Methodology,
Methodology,Methodology!
Planning your study can save valuable time
Have questions in mind before you open SP Guru
Build model to answer those questions
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