Computer Networking Project number 2 - Shahid Beheshti University - Summer 1399
Simple Network Simulator with python
Any version of Python 3
This program uses Bellman-Ford algorithm as routing mechanism to simulate network distances from each other.
To run:
python main.py
You're asked to enter network size. i.e. 5 (in secs.)
Then you should enter network properties:
First the graph size. i.e. 4 . then the name of the routers and topology of Networks.
As default the graph names will be R_0 to R_n-1 (n: the graph size). Or you can choose your names instead.
Then you enter number of connections between routers and finally you should enter connections.
The topology of network connections is in this form Router_name1 Router_name2 Port_number1 Port_number2 Network_Address. i.e. R1 R2 2002 3003 10.10.10.10
After finishing the initialization, you can get report of the distances from one specific network to the other routers by choosing the report mode. Then you asked to enter the network name i.e. 10.10.10.2.
You can add new networks by selecting this mode. The input form of adding connection was explained before.
The Bellman Ford algorithm runs periodically to cover possible changes (Like real networks). This value is asked in the first place, but it can be changed using this mode.
You can get report of the distances from one specific router to all networks by choosing the report router mode. Then you asked to enter the router name i.e. R0.
And you can close the simulation by sending quit command.
networks with the topology explained by the user will run Bellman-Ford algorithm to find the shortest path through the routers. This algorithm runs periodically to update in coordination with the possible changes each refresh_interval seconds.