Securing virtual network function placement with high availability guarantees

Casazza, Marco; Fouilhoux, Pierre; Bouet, Mathieu; Secci, Stefano

doi:10.23919/ifipnetworking.2017.8264850

Cited by 33 publications

(19 citation statements)

References 21 publications

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“…which can be divided into x C us for CVNF u ∈ N V,C and x R ws for RVNF w ∈ N V,R . Note that, in order to enhance the e2e reliability, we allow VNFs to be replicated across different servers [9]. Mapping (3) must ensure that, if the edge CVNF u − RVNF v exists in the FG and if CVNF u ∈ N V,C is instantiated on server s while RVNF v ∈ N V,R is instantiated on server t, then there must exist a physical link s − t in order for the logical link to be active [3].…”

Section: System Modelmentioning

confidence: 99%

Section: Introduction Promoted By the European Telecommunications mentioning

confidence: 99%

“…in computing load, hardware malfunctions or malicious attacks [2]- [9]. To ensure a desired level of end-to-end (e2e) reliability, previous works [5]- [9] allowed the replication of VNFs across multiple servers. In particular, the FGE problem was investigated in [5], [6] under worst-case e2e reliability guarantees.…”

Section: Introduction Promoted By the European Telecommunications mentioning

confidence: 99%

“…In contrast, reference [7] addressed the FGE problem for a general FG and physical layer under a simplified probabilistic framework in which a server cannot be assigned more than one VNF of the given service and the failures of different VNFs are independent. A similar model was also adopted in [8], [9], with [8] considering a communication delay between two virtual machines. In this work, we investigate the trade-off between the e2e reliability of a network service, as measured by the probability that the service is correctly executed, and the computational load of the servers.…”

Section: Introduction Promoted By the European Telecommunications mentioning

confidence: 99%

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On the Trade-Off Between Computational Load and Reliability for Network Function Virtualization

Kang¹,

Simeone²,

Kang³

2017

IEEE Commun. Lett.

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Abstract-Network Function Virtualization (NFV) enables the "softwarization" of network functions, which are implemented on virtual machines hosted on Commercial off-the-shelf (COTS) servers. Both the composition of the virtual network functions (VNFs) into a forwarding graph (FG) at the logical layer and the embedding of the FG on the servers need to take into account the less-than-carrier-grade reliability of COTS components. This work investigates the trade-off between end-to-end reliability and computational load per server via the joint design of VNF chain composition (CC) and FG embedding (FGE) under the assumption of a bipartite FG that consists of controller and regular VNFs. Evaluating the reliability criterion within a probabilistic model, analytical insights are first provided for a simplified disconnected FG. Then, a block coordinate descent method based on mixed-integer linear programming is proposed to tackle the joint optimization of CC and FGE. Via simulation results, it is observed that a joint design of CC and FGE leads to substantial performance gains compared to separate optimization approaches.

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Section: System Modelmentioning

confidence: 99%

Section: Introduction Promoted By the European Telecommunications mentioning

confidence: 99%

Section: Introduction Promoted By the European Telecommunications mentioning

confidence: 99%

Section: Introduction Promoted By the European Telecommunications mentioning

confidence: 99%

See 2 more Smart Citations

On the Trade-Off Between Computational Load and Reliability for Network Function Virtualization

Kang¹,

Simeone²,

Kang³

2017

IEEE Commun. Lett.

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“…A preliminary version of the content of this paper was presented at the 2017 IFIP Networking conference [7].…”

Section: Introductionmentioning

confidence: 99%

Availability-driven NFV orchestration

2019

Self Cite

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Virtual Network Functions as a Service (VNFaaS) is a promising business whose technical directions consist of providing network functions as a Service instead of delivering standalone network appliances, leveraging a virtualized environment named NFV Infrastructure (NFVI) to provide higher scalability and reduce maintenance costs. Operating the NFVI under stringent availability guarantees is fundamental to ensure the proper functioning of the VNFaaS against software attacks and failures, as well as common physical device failures. Indeed the availability of a VNFaaS relies on the failure rate of its single components, namely the physical servers, the hypervisor, the VNF software, and the communication network.In this paper, we propose a versatile orchestration model able to integrate an elastic VNF protection strategy with the goal to maximize the availability of an NFVI system serving multiple VNF demands. The elasticity derives from (i) the ability to use VNF protection only if needed, or (ii) to pass from dedicated protection scheme to shared VNF protection scheme when needed for a subset of the VNFs, (iii) to integrate traffic split and load-balancing as well as mastership role election in the orchestration decision, (iv) to adjust the placement of VNF masters and slaves based on the availability of the different system and network components involved. We propose a VNF orchestration algorithm based on Variable Neighboring Search, able to integrate both protection schemes in a scalable way and capable to scale, while outperforming standard online policies.

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Design of VNF-Mapping with Node Protection in WDM Metro Networks

Ruiz

Durán

Miguel

et al. 2019

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Network Function Virtualization (NFV) is considered to be one of the enabling technologies for 5G. NFV poses several challenges, like deciding the virtual network function (VNF) placement and chaining, and adding backup resources to guarantee the survivability of service chains. In this paper, we propose a genetic algorithm that jointly solves the VNF-placement, chaining and virtual topology design problem in WDM metro ring network, with the additional capacity of providing node protection. The simulation results show how important is to solve all of these subproblems jointly, as well as the benefits of using shared VNF and network resources between backup instances in order to reduce both the service blocking probability and the number of active CPUs.

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Securing virtual network function placement with high availability guarantees

Cited by 33 publications

References 21 publications

On the Trade-Off Between Computational Load and Reliability for Network Function Virtualization

On the Trade-Off Between Computational Load and Reliability for Network Function Virtualization

Availability-driven NFV orchestration

Design of VNF-Mapping with Node Protection in WDM Metro Networks

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