Virtual network function embedding in real cloud environments

Future network architectures will be completely reshaped by the emerging Network Function Virtualization (NFV) paradigm, and telco operators will likely deploy flexible infrastructures based on the cloud, offering programmable connectivity services and computing/storage facilities in the form of Vir...

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Bibliographic Details
Published in:Computer networks (Amsterdam, Netherlands : 1999) Netherlands : 1999), 2015-12, Vol.93, p.506-517
Main Authors: Bellavista, Paolo, Callegati, Franco, Cerroni, Walter, Contoli, Chiara, Corradi, Antonio, Foschini, Luca, Pernafini, Alessandro, Santandrea, Giuliano
Format: Article
Language:English
Subjects:
Cloud computing
Cloud management
Cloud networking
Computation
Computer architecture
Computer networks
Computer platforms
Data centers
Embedding
Mathematical analysis
Mathematical models
Network function virtualization (NFV)
Network topologies
Networks
Object linking & embedding
OpenStack
Operators (mathematics)
Placement
Storage facilities
Studies
VDC placement
Virtual data centers (VDC)
Virtual environments
Virtual networks
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Summary:Future network architectures will be completely reshaped by the emerging Network Function Virtualization (NFV) paradigm, and telco operators will likely deploy flexible infrastructures based on the cloud, offering programmable connectivity services and computing/storage facilities in the form of Virtual Data Centers (VDCs). This paper introduces and discusses some challenging technical issues associated with this promising approach, with a special focus on the exploitation of industry-relevant cloud platforms, such as OpenStack, and on network-aware optimal placement problem of entire VDCs, taking into account multiple virtual (Virtual Machines – VMs, virtual networks, …) and physical (host capacities, network topology and capacity, …) resources and constraints. The proposed placement, computed for real production OpenStack deployments, not only satisfies the predicted communication for all VDCs deployed atop the same physical data center, but also accounts for the (real) computing overhead due to intense communication load of VMs co-located on the same physical host, such as in the case of Virtual Network Functions (VNF) embedding, typically neglected by similar existing works.
ISSN:1389-1286
1872-7069
DOI:10.1016/j.comnet.2015.09.034