2017•arXiv (Cornell University)Open access
Implementation of Virtual Network Function Chaining through Segment Routing in a Linux-based NFV Infrastructure
Ahmed Abdelsalam, François Clad, Clarence Filsfils, Stefano Salsano, Giuseppe Siracusano, Luca Veltri
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Abstract
In this paper, we first introduce the NFV architecture and the use of IPv6 Segment Routing (SRv6) network programming model to support Service Function Chaining in a NFV scenario. We describe the concepts of SR-aware and SR-unaware Virtual Network Functions (VNFs). The detailed design of a network domain supporting VNF chaining through the SRv6 network programming model is provided. The operations to support SR-aware and SR-unaware VNFs are described at an architectural level and in particular we propose a solution for SR-unaware VNFs hosted in a NFV node. The proposed solution has been implemented for a Linux based NFV host and the software is available as Open Source. Finally, a methodology for performance analysis of the implementation of the proposed mechanisms is illustrated and preliminary performance results are given.
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