12/25/2015© 2008 Raymond P. Jefferis IIILect 12 - 1 Network Simulation.

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Presentation transcript:

12/25/2015© 2008 Raymond P. Jefferis IIILect Network Simulation

12/25/2015© 2008 Raymond P. Jefferis IIILect Network Components Router/SwitchSwitch/Hub Client Computers Server

12/25/2015© 2008 Raymond P. Jefferis IIILect Simulation Goals To predict system behavior under various traffic loading conditions To evaluate failure performance To evaluate design options

12/25/2015© 2008 Raymond P. Jefferis IIILect Simple Laboratory LAN

12/25/2015© 2008 Raymond P. Jefferis IIILect Simulation Software - Comnet III Complete dynamic network simulation system Supplies frames/packets according to specified ransom distribution Simulates randomly distributed service times Records data and generates reports

12/25/2015© 2008 Raymond P. Jefferis IIILect Workspace

12/25/2015© 2008 Raymond P. Jefferis IIILect Toolbar

12/25/2015© 2008 Raymond P. Jefferis IIILect Insert Network Object

12/25/2015© 2008 Raymond P. Jefferis IIILect Define Properties

12/25/2015© 2008 Raymond P. Jefferis IIILect Edit Default Values

12/25/2015© 2008 Raymond P. Jefferis IIILect Expand Network

12/25/2015© 2008 Raymond P. Jefferis IIILect Add Sources and Responses

12/25/2015© 2008 Raymond P. Jefferis IIILect Edit Source Properties

12/25/2015© 2008 Raymond P. Jefferis IIILect Edit Multiconnect Properties

12/25/2015© 2008 Raymond P. Jefferis IIILect Edit Response Properties

12/25/2015© 2008 Raymond P. Jefferis IIILect Select Distribution Function

12/25/2015© 2008 Raymond P. Jefferis IIILect Select Report Items

12/25/2015© 2008 Raymond P. Jefferis IIILect Specify Simulation Parameters

12/25/2015© 2008 Raymond P. Jefferis IIILect Set Animation Parameters

12/25/2015© 2008 Raymond P. Jefferis IIILect Start Simulation

12/25/2015© 2008 Raymond P. Jefferis IIILect Read Simulation Report

12/25/2015© 2008 Raymond P. Jefferis IIILect Basic LAN with Sources

12/25/2015© 2008 Raymond P. Jefferis IIILect Preparing Subnet for Routing Delete server and server response Add network device - hub or switch

12/25/2015© 2008 Raymond P. Jefferis IIILect Deletion of Server and Source

12/25/2015© 2008 Raymond P. Jefferis IIILect Adding Hub/Switch

12/25/2015© 2008 Raymond P. Jefferis IIILect Selecting Switch Type

12/25/2015© 2008 Raymond P. Jefferis IIILect Updating Switch Parameters

12/25/2015© 2008 Raymond P. Jefferis IIILect Resulting Subnet Form

12/25/2015© 2008 Raymond P. Jefferis IIILect Creating the Top Level Add a server and response source Add a router Add link to server Add link to subnet Add subnet symbol (do not link yet!)

12/25/2015© 2008 Raymond P. Jefferis IIILect Resulting Top Level

12/25/2015© 2008 Raymond P. Jefferis IIILect Creating the Subnet Link Get copy of subnet on clipboard Descend into subnet from subnet symbol on top (router) level Intermodel Paste subnet to blank sheet Add access point and link to subnet switch Make router link to subnet Save all

12/25/2015© 2008 Raymond P. Jefferis IIILect Select Subnet for Capture

12/25/2015© 2008 Raymond P. Jefferis IIILect Selected Subnet

12/25/2015© 2008 Raymond P. Jefferis IIILect Put Copy in Clipboard

12/25/2015© 2008 Raymond P. Jefferis IIILect Adding the Subnet Link

12/25/2015© 2008 Raymond P. Jefferis IIILect Insert Subnet

12/25/2015© 2008 Raymond P. Jefferis IIILect Subnet with Access Point Added

12/25/2015© 2008 Raymond P. Jefferis IIILect Connect Subnet to Router

12/25/2015© 2008 Raymond P. Jefferis IIILect Selecting a Router

12/25/2015© 2008 Raymond P. Jefferis IIILect Selecting a Subnet Switch

12/25/2015© 2008 Raymond P. Jefferis IIILect Select Simulation Reports

12/25/2015© 2008 Raymond P. Jefferis IIILect Simulated Channel Utilization

12/25/2015© 2008 Raymond P. Jefferis IIILect Simulated Client Delays

12/25/2015© 2008 Raymond P. Jefferis IIILect Questions to Follow Up How can channel utilization be reduced? How can client delays be reduced? What are the effects of various choices of network components? What would be the effect of changing the network interconnections from 10BaseT to 100BaseT

12/25/2015© 2008 Raymond P. Jefferis IIILect Steps Expand the top level Expand each subnet –Subnet 1:5 computers –Subnet 2:14 computers –Subnet 3:8 computers Simulate all

12/25/2015© 2008 Raymond P. Jefferis IIILect Previous Subnet

12/25/2015© 2008 Raymond P. Jefferis IIILect Clone the Subnets

12/25/2015© 2008 Raymond P. Jefferis IIILect New Server Layer

12/25/2015© 2008 Raymond P. Jefferis IIILect Laboratory Subnet

12/25/2015© 2008 Raymond P. Jefferis IIILect Classroom Subnet

12/25/2015© 2008 Raymond P. Jefferis IIILect Classroom Computer Group

12/25/2015© 2008 Raymond P. Jefferis IIILect Editing Group Parameters

12/25/2015© 2008 Raymond P. Jefferis IIILect Computer Group Parameters

12/25/2015© 2008 Raymond P. Jefferis IIILect Laboratory Group Parameters

12/25/2015© 2008 Raymond P. Jefferis IIILect Lab Subnet Properties

12/25/2015© 2008 Raymond P. Jefferis IIILect Specify Link Properties

12/25/2015© 2008 Raymond P. Jefferis IIILect Channel Utilizations

12/25/2015© 2008 Raymond P. Jefferis IIILect Transit Delays

12/25/2015© 2008 Raymond P. Jefferis IIILect Increasing Link Speeds

12/25/2015© 2008 Raymond P. Jefferis IIILect BaseT Utilization

12/25/2015© 2008 Raymond P. Jefferis IIILect BaseT Transit Delays

12/25/2015© 2008 Raymond P. Jefferis IIILect Importing Topology and Traffic

12/25/2015© 2008 Raymond P. Jefferis IIILect Comnet Baseliner ™ Used to import topology –extracts node and link information –generates Comnet topology file Used to import traffic models –uses network analyzer output (Ethernet, Token Ring, FDDI ring or Point-to-point links) –transforms captured network traffic –provides load characteristics for Comnet

12/25/2015© 2008 Raymond P. Jefferis IIILect Supported Network Management Systems (NMS) HP OpenView IBM NetView for AIX Digital PolyCenter Castlerock SNMPc Cabletron SPECTRUM NAC Mind

12/25/2015© 2008 Raymond P. Jefferis IIILect Topology Import Steps Export topology from NMS (*.top, *.csv, *.ncb) Import topology via COMNET Baseliner

12/25/2015© 2008 Raymond P. Jefferis IIILect Importing Example Topology

12/25/2015© 2008 Raymond P. Jefferis IIILect Select File for Import

12/25/2015© 2008 Raymond P. Jefferis IIILect Define Topology File

12/25/2015© 2008 Raymond P. Jefferis IIILect View the Topology

12/25/2015© 2008 Raymond P. Jefferis IIILect Another Sample

12/25/2015© 2008 Raymond P. Jefferis IIILect Select Topology and Import

12/25/2015© 2008 Raymond P. Jefferis IIILect Result

End 12/25/2015© 2008 Raymond P. Jefferis IIILect