Authors:
Dongcheng Zhao
1
;
Gang Sun
1
;
Dan Liao
1
;
Rahat Iqbal
2
and
Victor Chang
3
Affiliations:
1
UESTC, China
;
2
Coventry University, United Kingdom
;
3
Xi’an Jiaotong Liverpool University, China
Keyword(s):
Network Function Virtualization, Virtual Network Function, Service Function Chaining, Migration, Middle Boxes.
Abstract:
Network Function Virtualization (NFV) has been proposed to solve these challenges of hardware middle boxes such as high Capital Expenditures (CAPEX) and Operational Expenditures (OPEX). NFV aims to move packet processing from hardware middle boxes to software middle boxes running on commodity hardware. In NVF, users or virtual machines (VMs) communicate through the service function chaining. Therefore, when VMs are migrated, the service function chaining also needs to be migrated. Most research on migration focus on the issue of VM migration, and at present there is little research on the migration problem of the service function chaining. Therefore, in this paper we focus on the service function chaining migration, we will introduce the serial migration strategy and the parallel migration strategy for multiple VMs into the migration problem of the service function chaining, and propose an improved serial migration strategy for the service function chaining that is based on the seria
l migration strategy. We then present the m mixed migration strategy for the service function chaining that is based on the improved serial migration strategy and the parallel migration strategy. We conduct detailed simulations to evaluate the performance of the m mixed migration strategy in terms of the migration time and the downtime. We also develop the M/M/C/C and the M/M/C queuing models to calculate performance indicators, such as the blocking rate of each migration request.
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