4Mirantis. A new agent management approach for Quantum in OpenStack Grizzly [EB/OL]. (2013-03-22). http://www.mirantis.com/blog/a -new -agent -management - approach-in-quantum-for-openstack-grizzly.
5Gregor Schaffrath, Christoph Werle, Panagiotis Pa- padimitriou, et al. Network virtualization architecture: pro- posal and initial prototype [C]. ACM SIGCOMM Confer- ence, 2009: 63-72.