1. Bonmin home page http://www.coin-or.org/Bonmin/
2. CANARIE http://www.canarie.ca/en/network/overview/
3. TWAREN http://noc.twaren.net/noc_eng/index.php/
4. Configuring OSPF http://www.cisco.com/c/en/us/td/docs/security/asa/asa82/configuration/guide/config/route_ospf.pdf
5. Cisco visual networking index