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The largest IXPs carry on a daily basis traffic volumes in the petabyte range, similar to what some of the largest global ISPs reportedly handle. This little-known fact is due to a few hundreds of member ASes exchanging traffic with one another over the IXP's infrastructure. This paper reports on a first-of-its-kind and in-depth analysis of one of the(More)
Recent efforts in software-defined networks, such as OpenFlow, give unprecedented access into the forwarding plane of networking equipment. When building a network based on OpenFlow however, one must take into account the performance characteristics of particular OpenFlow switch implementations. In this paper, we present OFLOPS, an open and generic software(More)
Internet traffic has Zipf-like properties at multiple aggregation levels. These properties suggest the possibility of offloading most of the traffic from a complex controller (e.g., a software router) to a simple forwarder (e.g., a commodity switch), by letting the forwarder handle a very limited set of flows; the heavy hitters. As the volume of traffic(More)
While the IETF standardized IPv6 more than fifteen years ago, IPv4 is still the prevalent Internet protocol today. On June 8th, 2011, several large content and service providers coordinated a large-scale IPv6 test-run, by enabling support for IPv6 simultaneously: the World IPv6 Day. In this paper, we compare IPv6 activity before, during, and after the(More)
Applying the concept of SDN to WiFi networks is challenging , since wireless networks feature many peculiarities and knobs that often do not exist in wired networks: obviously, WiFi communicates over a shared medium, with all its implications , e.g., higher packet loss and hidden or exposed terminals. Moreover, wireless links can be operated in a number of(More)
—The rise of cloud services poses considerable challenges on the control of both cloud and carrier network in-frastructures. While traditional telecom network services rely on rather static processes (often involving manual steps), the wide adoption of mobile devices including tablets, smartphones and wearables introduce previously unseen dynamics in the(More)
Multimedia applications have recently been challenging existing mobile access networks and are raising the bar for next generation mobile networks (NGMN), both in terms of network traffic as well as in the expectations of end users. At the same time, the network and server landscape sees changes due to the advent of virtualization and split-architecture(More)
Not much is known today about how to reap the SDN benefits in WiFi networks-a critical use case given the increasing importance of WiFi networks. This paper presents <i>AeroFlux</i>, a scalable software-defined wireless network, that supports large enterprise and carrier WiFi deployments with low-latency programmatic control of fine-grained WiFi-specific(More)
—This paper attends to the well-known problem of compressing the Forwarding Information Base of a router or switch, while preserving a correct forwarding. In contrast to related work, we study an online variant of the problem where BGP routes can change over time, and where the number of updates to the FIB are taken into account explicitly. Minimizing the(More)