Abstract
Explicit Congestion Notification (ECN) is a TCP/IP extension that can avoid packet loss and thus improve network performance. Though standardized in 2001, it is barely used in today’s Internet. This study, following on previous active measurement studies over the past decade, shows marked and continued increase in the deployment of ECN-capable servers, and usability of ECN on the majority of paths to such servers. We additionally present new measurements of ECN on IPv6, passive observation of actual ECN usage from flow data, and observations on other congestion-relevant TCP options (SACK, Timestamps and Window Scaling). We further present initial work on burst loss metrics for loss-based congestion control following from our findings.
This work is partly funded by ETICS and mPlane, FP7 research projects supported by the EU. Thanks to SWITCH for the flow data used in this study.
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Kühlewind, M., Neuner, S., Trammell, B. (2013). On the State of ECN and TCP Options on the Internet. In: Roughan, M., Chang, R. (eds) Passive and Active Measurement. PAM 2013. Lecture Notes in Computer Science, vol 7799. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36516-4_14
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DOI: https://doi.org/10.1007/978-3-642-36516-4_14
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