Overlord

Overlord is a control plane network device database built to facilitate rapid OpenFlow network configuration. By using each host’s source mac address as an unique identifier, Overlord is able to detect changes in host IP addresses, source port numbers, and top-of-rack DPIDs. Overlord also provides basic layer2 packet forwarding, and network group creation. Important: Overlord only uses ARP to update its internal database.

Installation

Install Dependencies

1. mongodb-10gen
2. pymongo
3. POX
4. nodejs

Get Overlord

Clone or Fork Overlord into ~/POX_SOURCE/pox

cd ~/POX_SOURCE/pox/
git clone https://github.com/jonstout/overlord.git

Start Overlord

Start the OverlordWeb web server.

cd ~/POX_SOURCE/pox/Overlord/frontend
node app.js &

Start the Overlord controller

cd ~/POX_SOURCE/
./pox.py Overlord.overlord

OpenFlow Hardware Requirements

1. Match on source mac
2. Match on destination mac
3. Match on Ethertype