SDN/OpenFlow-based Unified Control of 100 Gb/s-Class Core/Metro/Access Optical Networks (Category B: Software Driven Networks (SDN)) Xiaoyuan Cao(1), Noboru Yoshikane(1), Takehiro Tsuritani(1), Teppei Yamaguchi(2), Takehiro Sato(2), Satoru Okamoto(2), Takaya Miyazawa(3), Hiroaki Harai(3) (1) KDDI R&D Laboratories Inc., Japan,
[email protected] (2) Keio University, Japan (3) National Institute of Information and Communications Technology (NICT), Japan Software-defined networking (SDN) [1] provides a new networking approach to offload the complex control and management functions to a centralized and flexible control plane, with Openflow [1] as a common open interface and communication protocol. Although SDN has been widely researched and partially demonstrated in the traditional IP network, it is yet expected to be extended for the optical networks, i.e. Software-defined optical network (SDON) [2]. SDON will not only benefit from the large optical transport capacity and low power consumption, but also the flexibility and reduced CAPEX/OPEX that SDN brings. On the other hand, with the popularization of cloud computing and datacenter, there’s a growing demand for datacenter/cloud interconnection, as well as the need to dynamically set up high-volume transmission pipe through multiple optical network domains, while SDN technique can be applied for service provisioning and traffic management. In light of this, here we present the interoperability demonstration of SDON across core, metro and access networks. As shown in Fig. 1, the demonstrated SDON comprises of elastic optical access networks, 100 Gb/s optical packet switching (OPS) metro networks [3], 100Gb/s WDM core network, datacenters emulated by traffic generators (Openflow emulators), and together coordinated by a network orchestrator based on Openflow controllers [4]. Optical paths are set up with flexible bandwidth over multiple optical networks based on datacenter requests (1 Gb/s connection across access/metro/core network and 10 Gb/s connection across metro/core network). Multiple optical network technologies are applied in the demonstration, including elastic bandwidth provisioning, OPS based on optical packet and circuit integrated (OPCI) nodes [5], and high-capacity WDM transmission [6]. Each access/metro/core network domain is virtualized and autonomously configured by its own network controller or Openflow agent (OFA), or further sliced by Flowvisor [7] in the case of OPS metro network. Only the virtualized network topology is provided to the network orchestrator in order to improve the scalability. When datacenter sends out a connection request, the network orchestration would perform end-to-end path computation based on the virtual topology, and inform each network domain of the calculation results. Then each access/metro/core network would compute the path and resource allocation within its own domain. After all networks finish configuration, the end-toend transmission is established successfully.
Fig. 1 Software-defined flexible optical metro/core /access networking
Acknowledgement:We would like to express our greatest appreciation to Mitsubishi Electric for their great supports. References [1] [2] [3] [4] [5] [6] [7]
http://www.opennetworking.org/, “The Open networking foundation homepage for SDN and Openflow”. Philip N. Ji, “Software defined optical network”, 11th International Conference on Optical Communications and Networks (ICOCN), Chonburi, Thailand, Nov. 2012. X. Cao, et al, “Architecture for Optical Packet Switching Network with Openflow Control”, to be presented at 10th Conference on IP + Optical Network (iPOP 2014), Tokyo, Japan, May 2014. http://www.noxrepo.org/, “The NOX/POX homepage”. H. Harai, “Optical packet and circuit integrated networks and SDN extensions,” ECOC 2013, Mo.4.E.1, September 2013. http://www.mitsubishielectric.com/news/2013/0214-f.html, “Mitsubishi Electric Develops 100 Gbps Optical Transmission Technologies for High-capacity Inter-City Communication”. https://openflow.stanford.edu/display/DOCS/Flowvisor, “The Flowvisor confluence”.
