networkfunctions Virtualization is an emerging initiative where standard IT virtualization evolves to consolidate networkfunctions onto high volume servers, switches and storage that can be located anywhere in the n...
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networkfunctions Virtualization is an emerging initiative where standard IT virtualization evolves to consolidate networkfunctions onto high volume servers, switches and storage that can be located anywhere in the network. In NFV, network services are built by chaining a set of Virtual networkfunctions (VNFs) that must be allocated on top of the physical network infrastructure (commodity hardware). This challenge is commonly known as the NFV resource allocation problem, that is divided in two problem stages: 1) service chain composition and 2) service chain embedding. Up to now, existing approaches do not scale with regard to problem size. In this paper, we address this problem and propose CoordVNF, a heuristic method to coordinate the composition of VNF chains and their embedding into the substrate network. Evaluation results show that the heuristic is able to quickly solve the allocation problem even in substrate network topologies with hundreds of nodes. (C) 2016 Elsevier B.V. All rights reserved.
networkfunctions Virtualization (NFV) is an emerging initiative to overcome increasing operational and capital costs faced by network operators due to the need to physically locate networkfunctions in specific hardw...
详细信息
ISBN:
(纸本)9781479959532
networkfunctions Virtualization (NFV) is an emerging initiative to overcome increasing operational and capital costs faced by network operators due to the need to physically locate networkfunctions in specific hardware appliances. In NFV, standard IT virtualization evolves to consolidate networkfunctions onto high volume servers, switches and storage that can be located anywhere in the network. Services are built by chaining a set of Virtual networkfunctions (VNFs) deployed on commodity hardware. The implementation of NFV leads to the challenge: How several network services (VNF chains) are optimally orchestrated and allocated on the substrate network infrastructure? In this paper, we address this problem and propose CoordVNF, a heuristic method to coordinate the composition of VNF chains and their embedding into the substrate network. CoordVNF aims to minimize bandwidth utilization while computing results within reasonable runtime.
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