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학술지 A Two-Stage Failover Mechanism for High Availability in Service Function Chaining
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저자
백호성, 고한얼, 박광우, 백상헌, 곽지영
발행일
201801
출처
Journal of Internet Technology, v.19 no.1, pp.229-236
ISSN
1607-9264
출판사
National Dong Hwa University
DOI
https://dx.doi.org/10.3966/160792642018011901022
협약과제
16MH1700, (통합)스마트 네트워킹 핵심 기술 개발, 양선희
초록
Service function chaining (SFC) enables specific network flows to be processed through an ordered set of service functions. In this paper, we propose a two-stage failover mechanism to provide high availability (HA) in SFC. In the proposed mechanism, a secondary service function path (SFP) is pre-computed, which is maximally disjointed with the primary SFP, and a backup service function instance (SFI) is prepared for each service function. For a failure event, the first local repair stage is examined by means of the preconfigured backup SFI. If the backup SFI is not available and/or any link is failed, the second end-to-end repair stage is triggered by replacing the primary SFP with the secondary SFP. Simulation results demonstrate that the proposed failover mechanism can reduce the recovery time by 50%-75% compared to the conventional approach.
키워드
Backup, High availability (HA)r, Service function (SF), Service function chaining (SFC), Service node (SN)
KSP 제안 키워드
Backup service, End to End(E2E), High availability, Network flow, Service function path, Two-Stage, local repair, ordered set, recovery time, service function chaining, simulation results