Networking Reference
In-Depth Information
Figure 13.5 Attributes
“_station” and “_uni_src” can be used to generate parameterized trafſc. Some of these
nodes include “atm_uni_src”, “ethernet_station”, “ppp_ip_station”, and “fddi_station”.
These nodes can be found in Object Palette. Next, we will demonstrate how to generate
parameterized trafſc with these node models, based on the case1 scenario.
In Project Editor, from the “Scenarios” menu, choose “Duplicate Scenario...” to
save the duplicated scenario as “case2”. Change both “client” and “server” objects'
“model” attributes to “ppp_ip_station”. Now you can edit the “Trafſc Generation Param-
eters” attribute of both “client” and “server” nodes to generate parameterized trafſc. This
attribute can be found in “IP” - “Trafſc Generation Parameters”. For both “client” and
“server” nodes, in the “Trafſc Generation Parameters” table, add a new trafſc row and
set the packet interarrival time and packet size distributions, as shown in Figure 13.6.
You can adjust these trafſc parameters to control the trafſc data rate.
Now you can run the simulation. The parameterized trafſc will be generated during
the simulation.
13.2.3
Explicit self-similar traffic based on raw packet generator (RPG) model
If you want to model more bursty trafſc like self-similar trafſc, you can use a raw packet
generator model which models the Fractal Point Processes (FPPs) such as Sup-FRP,
PowON-PowOFF, PowON-ExpOFF, ExpON-PowOFF, etc. RPG models are imple-
mented over IP and MAC layers, including “ppp_rpg_wkstn” and “ethernet_rpg_wkstn”
 
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