Reference : copycat: Testing Differential Treatment of New Transport Protocols in the Wild
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Computer science
copycat: Testing Differential Treatment of New Transport Protocols in the Wild
Edeline, Korian mailto [Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Dép. d'électric., électron. et informat. (Inst.Montefiore) >]
Kühlewind, Mirja [> >]
Trammell, Brian [> >]
Donnet, Benoît mailto [Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Algorithmique des grands systèmes >]
Applied Networking Research Workshop
Applied Networking Research Workshop
15 Juillet 2017
[en] copycat ; differential treatment ; UDP ; ossification
[en] Recent years have seen the development of multiple transport solutions to address the ossification of TCP in the Internet, and to ease transport-layer extensibility and deployability. Recent approaches, such as PLUS and Google's QUIC, introduce an upper transport layer atop UDP; their deployment therefore relies on UDP not being disadvantaged with respect to TCP by the Internet.

This paper introduces copycat, a generic transport protocol testing tool that highlights differential treatment by the path in terms of connectivity and QoS between TCP and a non-TCP transport protocol. copycat generates TCP-shaped traffic with custom headers, and compares its performance in terms of loss and delay with TCP. We present a proof-of-concept case study (UDP vs. TCP) in order to answer questions about the deployability of current transport evolution approaches, and demonstrate the extent of copycat's capabilities and possible applications.

While the vast majority of UDP impairments are found to be access-network linked, and subtle impairment is rare, middleboxes might adapt to new protocols that would then perform differently in the wild compared to early deployments or controlled environment testing.
H2020 ; 688421 - MAMI - Measurement and Architecture for a Middleboxed Internet

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