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- W2991458367 abstract "The conventional wisdom is that a software-defined network (SDN) operates under the premise that the logically centralized control plane has an accurate representation of the actual data plane state. Unfortunately, bugs, misconfigurations, faults or attacks can introduce inconsistencies that undermine correct operation. Previous work in this area, however, lacks a holistic methodology to tackle this problem and thus, addresses only certain parts of the problem. Yet, the consistency of the overall system is only as good as its least consistent part. Motivated by an analogy of network consistency checking with program testing, we propose to add active probe-based network state fuzzing to our consistency check repertoire. Hereby, our system, Pazz, combines production traffic with active probes to periodically test if the actual forwarding path and decision elements (on the data plane) correspond to the expected ones (on the control plane). Our insight is that active traffic covers the inconsistency cases beyond the ones identified by passive traffic. Pazz prototype was built and evaluated on topologies of varying scale and complexity. Our results show that Pazz requires minimal network resources to detect persistent data plane faults through fuzzing and localize them quickly while outperforming baseline approaches." @default.
- W2991458367 created "2019-12-05" @default.
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- W2991458367 date "2020-06-01" @default.
- W2991458367 modified "2023-10-18" @default.
- W2991458367 title "Toward Consistent SDNs: A Case for Network State Fuzzing" @default.
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- W2991458367 doi "https://doi.org/10.1109/tnsm.2019.2955790" @default.
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