On Optimizing Backup Sharing Through Efficient VNF Migration

Abstract

With the emergence of software defined networking and network function virtualization technologies, network services are expected to be offered as service function chains made out from virtual network functions that are connected to steer and process the incoming traffic. In this context, achieving the survivability of these chains against failures is a key challenge to ensure high availability and continuity of the services. A promising solution proposed in the literature is to provision backups for the virtual network functions that could be shared among multiple service chains. These backups are used in case of a failure to take over the failed functions and ensure service continuity. In this paper, we propose two solutions to efficiently place and provision the shared backups in order to ensure the survivability of the service chains against single node failures. The originality of these solutions is that they leverage the migration of virtual network functions to minimize the resources consumed by the backups. Simulation results show that, compared to existing solutions, the proposed schemes leveraging migration are able to reduce by up to 20% the amount of resources allocated for the shared backups while ensuring the survivability of the service chains .

Guaranteeing Network Reliability to 0-Day Exploits Using Cost-Effective Heterogeneous Node Migration

“…Node migration is a common operation in networking, used for different goals such as guaranteeing quality of service [43], [44], [45], [46] and increasing reliability [8], [47]. In [43], they migrate a virtual machine (VM) between data centers to keep services working during data center maintenance.…”

“…Nodes to be migrated are chosen to meet spectrum and service continuity constraints. In [47], principal VNFs are migrated from their physical locations to reduce the number of backup VNFs required to provide network redundancy. As a result, the migrated network reaches a minimum number of backup VNFs to mitigate the effects of a single physical node failure, while reducing migration costs associated with bandwidth/CPU consumption and service interruption.…”

Reliability-Aware Service Function Chain Backup Protection Method

“…The work in [31] considers the heterogeneous resource requirements of VNFs for backup VNF deployment. Aidi et al [32] migrate VNF instances to reduce the number of required backup VNFs and resource consumption.…”

Proactive and AoI-aware Failure Recovery for Stateful NFV-enabled Zero-Touch 6G Networks: Model-Free DRL Approach

“…In this section, we review recent studies on these topics. There are a few studies on backup placement and recovery in recent years, and most of them focus on stateless backup placement and availability optimization [22]- [25]. For example, the authors of [22] propose a stateless backup provisioning scheme that starts by deciding on the number of shared backups and their placements.…”

“…There are a few studies on backup placement and recovery in recent years, and most of them focus on stateless backup placement and availability optimization [22]- [25]. For example, the authors of [22] propose a stateless backup provisioning scheme that starts by deciding on the number of shared backups and their placements. To improve the resource utilization efficiency, the authors of [23] introduces a new sharing mechanism of redundancy and multi-tenancy technology.…”