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Network Functions Virtualization (NFV) is a new network architecture concept which leverages virtualization technologies to make the management of network functions like firewalls, load balancers, WAN optimizers more flexible and cost effective. In this approach, traditional middlebox appliances are replaced by virtual machines embedding Virtual Network Functions (VNFs). One of the main challenges...
Network Function Virtualization (NFV) is an emerging approach that has received attention from both academia and industry as a way to improve flexibility, efficiency, and manageability of networks. This flexibility can be leveraged to allow for a better optimization of Virtual Network Functions (VNFs), which can now be dynamically placed in the network to adapt efficiently to both network constraints...
Network Function Virtualization (NFV) is an emerging approach that has received attention from both academia and industry as a way to improve flexibility, efficiency, and manageability of networks. NFV enables new ways to operate networks and to provide composite network services, opening the path toward new business models. As in cloud computing with the Infrastructure as a Service model, clients...
In the SDN approach, the control and data planes are separated to enable programmability and interoperability, the control plane being logically centralized. Scalability and reliability are key properties for the SDN control plane. In WAN deployments, it is already envisioned as physically distributed to span across the networks and avoid single point of failure. In this paper, we tackle the problem...
Distributed SDN controllers have been proposed to address performance and resilience issues. While approaches for datacenters are built on strongly-consistent state sharing among controllers, others for WAN and constrained networks rely on a loosely-consistent distributed state. In this paper, we address the problem of failover for distributed SDN controllers by proposing two strategies for neighbor...
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