7/30/2019 Opnet - Introduction
1/22
Multimedia Network
INTRODUCTION TO OPNET
ttp: ce.s ar .e u courses - ce -Instructor : Dr. Hamid R. Rabiee
Spring 2012
1
7/30/2019 Opnet - Introduction
2/22
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)
2
7/30/2019 Opnet - Introduction
3/22
RoadmapWorking with 3
levels of protocols stack:
1. Application Layer:
Defining services with Different SLAs.
3. Network layer: Routing protocols, IP, ICMP,..
3
7/30/2019 Opnet - Introduction
4/22
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
4
7/30/2019 Opnet - Introduction
5/22
Previous term project
Sharif Campus Network Design
Not a unique solution Several groups, several methodologies, different
designs
Lets take a look at it
5
7/30/2019 Opnet - Introduction
6/22
Network TopologySharif network topology is available at:
http://cc.sharif.ir/web/guest/32
6
7/30/2019 Opnet - Introduction
7/22
Defining the Projects Stages
Network
services
and theirSLA
Traffic
Matrix
Network
topology
Routing
Protocols
Methodology CapacityPlanning
Failure
Analysis
7
7/30/2019 Opnet - Introduction
8/22
Network Topology (cont)
Google Earth
Latitude, Logtitude
PoP points
8
7/30/2019 Opnet - Introduction
9/22
Network Services & Their SLA
Goal of a network
What services do we need?What Quality of Service do each require?
9
7/30/2019 Opnet - Introduction
10/22
Campus Network Service
HTTP
Database
Video Conferencing
Voice Conferencing
FTP
Reference
10
7/30/2019 Opnet - Introduction
11/22
Simulation Methodology
Traffic Matrix
# of Users Users behavioral pattern
Define traffic flows - MRTG
11
7/30/2019 Opnet - Introduction
12/22
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/
12
7/30/2019 Opnet - Introduction
13/22
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
13
7/30/2019 Opnet - Introduction
14/22
Traffic Matrix OPNET
Define Flow from each Department and Office
Export a spreadsheetWrite into spreadsheet
Import to OPNET
14
7/30/2019 Opnet - Introduction
15/22
Capacity Planning
Why is it needed?
network resource demand increasing over time
More usersmore demands
More applications providedmore demands & BW
15
7/30/2019 Opnet - Introduction
16/22
Capacity Planning SLA Violation
Violation
End2End Delay
16
7/30/2019 Opnet - Introduction
17/22
Capacity Planning OPNET Capacity PlanningUse OPNET to forecast traffic volume
Core Router Core Switch
Core Router Internet
17
7/30/2019 Opnet - Introduction
18/22
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
18
7/30/2019 Opnet - Introduction
19/22
ExampleEffective link : Core Router Core Switch
19
7/30/2019 Opnet - Introduction
20/22
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
20
7/30/2019 Opnet - Introduction
21/22
assignmentsOpnet installation
LAB1
21
7/30/2019 Opnet - Introduction
22/22
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
22
Top Related