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A Two-Stage Failover Mechanism for High Availability in Service Function Chaining
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- Authors
- Hosung Baek, Haneul Ko, Gwangwoo Park, Sangheon Pack, Jiyoung Kwak
- Issue Date
- 2018-01
- Citation
- Journal of Internet Technology, v.19, no.1, pp.229-236
- ISSN
- 1607-9264
- Publisher
- National Dong Hwa University
- Language
- English
- Type
- Journal Article
- Abstract
- 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.
- KSP Keywords
- 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