TY - JOUR
T1 - A two-stage failover mechanism for high availability in service function chaining
AU - Baek, Hosung
AU - Ko, Haneul
AU - Park, Gwangwoo
AU - Pack, Sangheon
AU - Kwak, Jiyoung
N1 - Funding Information:
This work was supported by the ICT R&D program of MSIP/IITP [B0101-16-0233: Smart Networking Core Technology Development and B0190-15-2012: Global SDN/NFV Open-Source Software Core Module/ Function Development].
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - Backup
KW - High availability (HA)r
KW - Service function (SF)
KW - Service function chaining (SFC)
KW - Service node (SN)
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U2 - 10.3966/160792642018011901022
DO - 10.3966/160792642018011901022
M3 - Article
AN - SCOPUS:85046821868
VL - 19
SP - 229
EP - 236
JO - Journal of Internet Technology
JF - Journal of Internet Technology
SN - 1607-9264
IS - 1
ER -