Abstract
The software defined networking (SDN) enabled by OpenFlow protocol has gained popularity which can enable the network to be programmable and accommodate both fixed and flexible bandwidth services. In this paper, we present a unified multi-layer (UML) architecture with multiple controllers and a dynamic orchestra plane (DOP) for software defined multi-domain optical networks. The proposed architecture can shield the differences among various optical devices from multi-vendors and the details of connecting heterogeneous networks. The cross-domain services with on-demand bandwidth can be deployed via unified interfaces provided by the dynamic orchestra plane. Additionally, the globalization strategy and practical capture of signal processing are presented based on the architecture. The overall feasibility and efficiency of the proposed architecture is experimentally verified on the control plane of our OpenFlow-based testbed. The performance of globalization strategy under heavy traffic load scenario is also quantitatively evaluated based on UML architecture compared with other strategies in terms of blocking probability, average hops, and average resource consumption.
Highlights
As a promising centralized control architecture, the software defined networking (SDN) enabled by OpenFlow protocol has gained popularity by supporting programmability of data center and IP network functionalities [1,2], which has become the miniature of future network for its great advantages of separating the control plane from the data plane [3]
To solve the problems described above, we propose a unified multi-layer (UML) architecture with dynamic orchestra plane (DOP) in multi-domain network with multi-controller based on software defined optical network (SDON)
(1) It responses to the requests from the application plane; (2) It reads and stores the network information reported by the control plane, including the whole network topology, resources intra- and inter-domains, which is the basis of global optimization; (3) It provides the unified interface to the control plane with being aware of the controller vendor and the vendor-specialized protocol between the controller and the switches
Summary
As a promising centralized control architecture, the software defined networking (SDN) enabled by OpenFlow protocol has gained popularity by supporting programmability of data center and IP network functionalities [1,2], which has become the miniature of future network for its great advantages of separating the control plane from the data plane [3]. From the data plane’s perspective, in order to accommodate the traffic demands, the elastic optical network has been proposed and experimentally demonstrated [4,5] to better utilize the frequency resource and accommodate super-wavelength traffic effectively. It supports channels operating at heterogeneous line rates [6] by allocating spectral resources tailored for a variety of connection demands in a flexible and dynamic manner [7]. To solve the problems described above, we propose a unified multi-layer (UML) architecture with dynamic orchestra plane (DOP) in multi-domain network with multi-controller based on SDON.
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