back to the home page


OPNET Technologies
3400 International Drive, NW
Washington, DC 20008
Tel: 202-364-4700

Fax: 202-364-8554
E-mail: university@opnet.com
Web: www.opnet.com

OPNET is a registered
trademark of OPNET Technologies

© 2000 OPNET Technologies


University: University of Perugia
Professor:
Gianluca Reali

Researcher: Luca Rossi
Department: Department of Electronic and Information Engineering

The prefixed aim for which we had used the software OPNET Modeler 7.0 was to simulate a network based on the new technology called Switch layer 2/3 (through which to organize a VLAN network) that is Switch with routing task (especially  IP routing). The reasons that these new devices were born was to create VLAN between  LAN with different IP addresses. The most simple network project can be seen here.

We now see greater software characteristics :

  • The first thing to do was to  see if the devices that composed the network were inside the software library: as can be seen from the figure  there are  greater network industries but I need devices projected for the occasion.
  • The next thing was to create Switches through the path that can be seen here: the main characteristics that can be set up are the packet per second and the number of ports which have to compose the device.
  • At this point I need to enter inside the device to set up the single ports characteristics of bit per second and packet format (see the figure ).
  • Being the server/client network, the next thing to do was to set up server characteristics (see the figure).
  • With the Profile Definition and Application Definition icons it is possible define the traffic models.
  • The last thing was to set up the Switches to define the VLAN structure (see the figure).
  • An ulterior software characteristic was to duplicate project scenarios because, if  had to change the project a little, it can be compared with  results after simulations were terminated (see the figure).

Now the network is ready to be simulated: as can be seen in the it is possible from the simulation figure have generals statistics, nodes statistics and links statistics.

After simulation is terminated it is possible, through results command, to analyze the results set up at the precedent point(Click here to see some results).