@techreport{TD:101468,
	att_abstract={{Cloud today is evolving towards multi-datacenter deploy-
ment, with each datacenter serving customers in different
geographical areas. The independence between datacenters,
however, prohibits effective inter-datacenter resource shar-
ing and flexible management of the infrastructure. In this
paper, we propose WL2, a Software-Defined Networking
(SDN) solution to an Internet-scale Layer-2 network across
multiple datacenters. In WL2, A centralized controller han-
dles control-plane communication and configuration in each
datacenter. We achieve scalability in three ways: (1) elim-
inating Layer-2 broadcast by rerouting control-plane traf-
fic to the controller; (2) introducing a layered addressing
scheme for aggregate Layer-2 routing; and (3) creating an
overlay abstraction on top of physical topology for fast flow
setup. WL2 is fault-tolerant against controller and gateway
failures. We deployed and evaluated WL2 in a 2,250-VM
testbed across three datacenters. The results indicate high
performance and robustness of the system.}},
	att_authors={cl727w, pl869j},
	att_categories={},
	att_copyright={{ACM}},
	att_copyright_notice={{(c) ACM, 2015. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in 2015 {{, 2015-06-17}}.
}},
	att_donotupload={},
	att_private={false},
	att_projects={},
	att_tags={},
	att_techdoc={true},
	att_techdoc_key={TD:101468},
	att_url={http://web1.research.att.com:81/techdocs_downloads/TD:101468_DS1_2015-06-22T20:36:41.904Z.pdf},
	author={Chen Chen and Changbin Liu and Pingkai Liu and Boon Thau Loo and Ling Ding},
	institution={{ACM Sigcomm Symposium on SDN Research (SOSR)}},
	month={June},
	title={{A Scalable Multi-Datacenter Layer-2 Network Architecture}},
	year=2015,
}