WAN emulator uses Mininet in order to implement a random network topology, like the one depicted in the image below.
Then two external interfaces of the host are connected to the edge bridges of the topology, to allow incoming traffic from one interface to go through the virtual network in Mininet and to exit the host from the other interface. This way, WAN emulator can be used as part of a larger physical Network, adding various traffic parameters, such as delay, bandwidth and loss.
- Mininet >= 2.2 Install Mininet
- Python >= 3.6 Install Python
git clone https://github.com/medianetlab/wan_emulator.git
cd wan_emulatorRun the script sdn_topology.py with sudo in order to start the network. The network will be created and the Mininet CLI will come up. Type exit to exit the WAN emulator.
usage: sdn_topology.py [-h] [--bandwidth BW] [--delay DELAY] [--loss LOSS]
[--ryu] [--controller CTL]
[--nodes {3..19}]
[--hosts {1..9}] [--random]
Mininet WAN Emulator
optional arguments:
-h, --help show this help message and exit
--bandwidth BW, -b BW
Define the Bandwidth on the links in Mbps (Example:
1000)
--delay DELAY, -d DELAY
Define the Delay on the links in ms (Example 1)
--loss LOSS, -l LOSS Define the Loss on the links in percentage (Example 1)
--ryu Start RYU Controller with Simple Switch module on
localhost
--controller CTL, -c CTL
Define a custom SDN Controller for switches in the
form controller_ip:port. By default it will try
localhost
--nodes {3..19}, -n {3..19}
Define the number of intermediate nodes/switches in
the system. Default=4
--hosts {1..9}
Add hosts to random switches on the topology
--random Create a random switch topology and block loops using
STP