rtretyak/of-switch-tester

OpenFlow Switch Test Harness

of-switch-tester

Provides base framework for simple testing of throughput of and OpenFlow switch based on Ryu.

Requirements

• An OpenFlow switch
• docker > 2.1
• docker-compose > 1.25.5
• python3
• Python Requests package

Installation

1. First build the docker Ryu container with docker build -t ryu ryu
2. Run docker-compose up -d which will download the OpenTSDB docker image the first time.
3. Look at switch_test_runner.py for some example test cases (feel free to contribute more)

Operations

docker-compose up will start 2 docker containers

1. OpenTSDB - a self contained OpenTSDB server

2. Ryu - the Ryu OpenFlow controller running 3 applications

   ryu.app.ofctl_rest - provides REST interface for common operations such as stats request, flow crud, etc (documentation can be found at https://ryu.readthedocs.io/en/latest/app/ofctl_rest.html) RyuToOpentsdb - queries connected switches every 10 seconds and record of_port_stats_reply and of_flow_stats_reply into OpenTSDB TpnRyuUtils - provides a REST endpoint for sending packet outs

Once the containers are running point your OpenFlow switch at the Ryu container on port 6653 (can be changed in docker-compose). Then run your switch_test_runner.py and watch the pretty graphs in OpenTSDB.

TpnRyuUtils

Provides a single rest endpoint

POST http://hostname:8080/tpn/packet_out/{switchid}/{port}/{pkt_size}/{count}

Where

• switchid = DPID of the target switch
• port = port number to send the Packet Out
• pkt_size = total size of the packet including the header
• count = number of packet out's to send (need at least 1)

Packet Out will be a UDP packet with a payload of all 0's and these for the header:

DL_DST = '11:22:33:44:55:66' DL_SRC = '66:55:44:33:22:11' DL_TYPE = ether.ETH_TYPE_IP IP_SRC = '1.1.1.1' IP_DST = '2.2.2.2' IP_PROTO = inet.IPPROTO_UDP

Run Scenarios

• Setup python virtual environment if using (yes Kevin this if for you):

python3 -m venv venv

• If using virtual environment (yes still for Kevin):

. ./venv/bin/activate

• Install requirements no matter if using virtual environment or not (not just for Kevin)

pip install -r client/requirements.txt

• Install of-tester at least in development mode by:

python setup.py develop

• Run scenario:

oftester scenario.yaml

Good Luck!