Notice

1. This is the project of a gratuate school course, not the repo of the orginal WECMP paper.
2. The project was not implemented by myself only, and I am not sure whether it is the final integral version. (I cannot understand it now. lol)
3. I combined several P4 exercises to write the code, mainly "load_balance" and "P4runtime".
4. A more complete solution implemented by @NicoleVenachi and @jmcc153 could be found in here.

Environment

The download link of the developing environment is here, but it is the "P4 Tutorial 2019-04-25" release. The latest version may be found on "p4lang". After opening the VM, there is a "tutorials" folder which is very ancient version. Maybe you could clone the latest tutorials first, and then, clone this repo.

"load_balance.p4.sw" and "topology.json.2" should be useless, I forget what they do.

Testing

1. First, we neet to build it up.

   $ cd /path/to/the/repo

   $ make run

   This command will start a Mininet instance, so we will see the command line become "mininet> ".

2. Open the node terminals. In this case, we have 2 nodes and 4 switchs.

   mininet> xterm h1 h2

   Confirming whether the network is connected.

   mininet> h1 ping h2

   Performing haevy communications between the nodes.

   mininet> iperf h1 h2

3. Try the effect of load balance While iperf works.

   Node2 (h2)

   $ ./receive.py

   Node1 (h1)

   $ ./send.py 10.0.2.2 "test"

   The packet info would show in the node terminals.