NetSim – A look at the simulation config file

Sophisticated users model their simulation via a config file that is independent of the GUI. The config file contains all required information to run the simulation including the network topology, devices, links, traffic, statistics, traces etc. Given below are important features of NetSim’s config file:

Model in XML format

Unlike, traditional simulators that use a flat text file, NetSim uses XML format given its advantages.

a. Quicker Understanding: It is easier to understand what the document holds at a glance and has moreprecise declarations of content allowing for more meaningful search results

b. Better Presentation: XML enables the separation of presentation from data and is suitable as a description for complex hierarchical data as is typical in a simulation config file

c. Automatic Format Verification: MSVC allows you to switch between XML view and Data View, and helps to locate syntax error. The schema we provide along with enables statement completion feature, as well as an option to validate the XML data.

Mirror Real Networks

Various network technologies are supported including LAN, WAN, PAN, WSN, Mobile, Cellular, Wireless and Inter-network.

Devices are modeled per the 5 layer TCP / IP stack. Users can set protocol properties in each of these layers in all devices.

Traffic can be configured as applications like FTP, Database, Voice, Video etc. Further, lower level mathematical distributions are available for packet size and inter-arrival time for users to model custom apps.

And finally, the config file provides a simple interface for linking external libraries.

Log traces and analyze metrics

The config file allows you to choose end-to-end metrics you wish to analyze and traces you want to log. A range of statistics is available including throughput, utilization, delay, error, loss etc. The packet trace can be logged in .txt or .csv format and an event trace can be generated for those using our debug libraries.