Computer and Modernization ›› 2024, Vol. 0 ›› Issue (12): 116-123.doi: 10.3969/j.issn.1006-2475.2024.12.017

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SDN Failure Detection and Recovery Scheme Based on State-aware Data Plane

  

  1. (Qingdao Institute of Software/College of Computer Science and Technology, 
    China University of Petroleum(East China), Qingdao 266580, China)
  • Online:2024-12-31 Published:2024-12-31

Abstract:  The processing strategy when a node or link fails in an SDN network is usually based on static flow table rules. Due to the limitation of the separation of the SDN data plane and control plane architecture, it is not allowed to store any network flow state information in the data plane, which results in the lack of autonomous fault decision-making capability of the data plane, and to address this problem, a state-aware data plane-based SDN fault detection and recovery scheme, SAFDR, is proposed. SAFDR defines the relationship between data flow processing primitives and state transitions in the data plane, and forms a state-aware data plane fault detection and recovery method to improve the flexibility of data plane processing and adaptive capability in case of faults.The link quality analysis model proposed in SAFDR dynamically updates the set of standby links according to the network state, which can efficiently solve the link congestion problem caused by the dynamic network changes. In this paper, we use simulation experiments to demonstrate that SAFDR meets the requirements of carrier-grade fault recovery time and has higher link utilization than other fault recovery solutions.

Key words: SDN, state-aware data plane, failure detection and recovery, multi-dimensional link quality analysis

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