InthecurrentInternet,thereisnocleanwayforaffectedparties to react to poor forwarding performance: to detect and assess Service Level Agreement (SLA) violations by a contractual partner, a domain must resort to ad-hoc monitoring using probes. Instead, we propose Network Confessional, a new, systematic approach to the problem of forwardingperformanceverification. Oursystemreliesonvoluntaryreporting, allowing each network domain to disclose its loss and delay performance to its customers and peers and, potentially, a regulator. Most importantly, it enables verifiable performance measurements, i.e., domains cannot abuse it to significantly exaggerate their performance. Finally, our system is tunable, allowing each participating domain to determinehowmanyresourcestodevotetoitindependently(i.e., without any inter-domain coordination), exposing a controllable trade-off between performance-verification quality and resource consumption. Our system comes at the cost of deploying modest functionality at the participating domains’borderrouters;weshowthatitrequiresreasonable resources, well withinmodernnetwork capabilities
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