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<a target="_blank" rel="noopener" href="https://fatcat.wiki/container/dblq4vz53na4zjrvjgz6usgtva" style="color: black;">2016 Fifth European Workshop on Software-Defined Networks (EWSDN)</a>
Several Internet Service Providers (ISP) are planning to innovate their infrastructures through a process of network softwarisation and programmability. The Software-Defined-Network (SDN) paradigm aims at improving the design, configuration, maintenance and service provisioning agility of the network through a centralised software control plane which is in charge of managing the entire system. This is easily achievable for local area networks, typical of data centres, where the benefits of<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/ewsdn.2016.12">doi:10.1109/ewsdn.2016.12</a> <a target="_blank" rel="external noopener" href="https://dblp.org/rec/conf/ewsdn/GerolaLSSVSC16.html">dblp:conf/ewsdn/GerolaLSSVSC16</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/izbf4ley4vepjmmb3mffauxdfm">fatcat:izbf4ley4vepjmmb3mffauxdfm</a> </span>
more »... g programmable access to the entire network is not restricted by latency. However, in Wide Area Networks, a centralised control plane limits the speed of responsiveness in reaction to time-constrained network events due to unavoidable latencies caused by physical distances. A logical step towards robustness in SDN is to distribute the load of the control plane between entities, each taking care of a portion of the entire geographical network and each providing an east-west communication interface to enable programmability of the entire network. Moreover, a key objective of an SDN control plane targeting an ISP networks is the east-west interface with external domains under the control of other providers. In this article we present ICONA (Inter Cluster Onos Network Application), a tool that has the objective of enabling programmable networks to span multiple clusters of controllers within either a single or multiple administrative domains. In particular, the paper describes the architecture behind ICONA and provides an initial evaluation obtained on a preliminary version of the tool, built on top of the cutting-edge network controller ONOS, Hummingbird release.
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