Exploring DSCP modification pathologies in mobile edge networks

Custura, Ana; Venne, A. Saskia; Fairhurst, Gorry

doi:10.23919/tma.2017.8002923

Cited by 10 publications

(11 citation statements)

References 14 publications

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“…While the blackholing finding was not confirmed by other work, the rest of the results are more similar: in line with [2], the authors of [8], [9] (focusing on mobile edge networks) and [10] find that the DSCP field is often rewritten, and particularly often zeroed, by routers along a path. Setting the field to zero means that any possible effect from the input DSCP value further downstream is eliminated, but otherwise this is not getting in the way of "normal" communication.…”

Section: Related Workmentioning

confidence: 52%

Investigating the Delay Impact of the DiffServ Code Point (DSCP)

Welzl

Islam

Barik

et al. 2019

2019 International Conference on Computing, Networking and Communications (ICNC)

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The DiffServ Code Point (DSCP) field in the IP header allows to specify a desired per-hop behavior as packets traverse routers. Setting the DSCP field opportunistically, without prior contractual agreement, has recently become accepted practice for Internet end hosts. Measurement studies find that there is reason to hope for a DSCP setting to have an effect on traffic, and at least configuring this value is not heavily detrimental: systematic drops of packets due to non-zero DSCP values are rare, and the value is often left intact along an end-to-end path. What these studies do not discuss is whether per-hop behaviors truly are honored: what happens to packets in terms of the delay they experience? In this paper, we make an attempt to find a first answer to this by mining a dataset of our own recent large-scale measurement study. Using a deep neural network, we obtain the importance of the factors which help us understand the delay impact of the DSCP.

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Section: Related Workmentioning

confidence: 52%

Investigating the Delay Impact of the DiffServ Code Point (DSCP)

Welzl

Islam

Barik

et al. 2019

2019 International Conference on Computing, Networking and Communications (ICNC)

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“…We also analyse the MSS in the mobile edge. This used data already collected using Pathtrace in February 2017 [24] for clients in mobile edge networks. The clients measured the European MONROE [9] platform providing over 120 vantage points spanning 12 mobile providers and several edge networks.…”

Section: Experiments Designmentioning

confidence: 99%

Exploring Usable Path MTU in the Internet

Custura

Fairhurst

Learmonth

2018

2018 Network Traffic Measurement and Analysis Conference (TMA)

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To optimise their transmission, Internet endpoints need to know the largest size of packet they can send across a specific Internet path, the Path Maximum Transmission Unit (PMTU). This paper explores the PMTU size experienced across the Internet core, wired and mobile edge networks.Our results show that MSS Clamping has been widely deployed in edge networks, and some webservers artificially reduce their advertised MSS, both of which we expect help avoid PMTUD failure for TCP. The maximum packet size used by a TCP connection is also constrained by the acMSS. MSS Clamping was observed in over 20% of edge networks tested. We find a significant proportion of webservers that advertise a low MSS can still be reached with a 1500 byte packet. We also find more than half of IPv6 webservers do not attempt PMTUD and clamp the MSS to 1280 bytes.Furthermore, we see evidence of black-hole detection mechanisms implemented by over a quarter of IPv6 webservers and almost 15% of IPv4 webservers. We also consider the implications for UDP -which necessarily can not utilise MSS Clamping. The paper provides useful input to the design of a robust PMTUD method that can be appropriate for the growing volume of UDPbased applications, by determining ICMP quotations can be used as to verify sender authenticity.

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“…Surveying DSCP modifications in mobile networks. MONROE is used by a group of researchers in [6] to conduct a survey on pathlevel treatment of DiffServ packets in MBB networks and identify behaviors that potentially violate the IETF specifications. Differentiated Services (DiffServ) enable classification of traffic into Quality of Service classes via usage of the Differentiated Services Code Point (DSCP) field in the IP header.…”

Section: Experiments From External Projectsmentioning

confidence: 99%

“…5 http://zeromq.org/6 http://cassandra.apache.org/ Experiment workflow covering the design, test and experimentation phases.experiment may be related to the network conditions during its execution, even if at that time not all the metadata was checked online. Researchers may also import the CSV dumps into their own tools for more specific data analyses.…”

mentioning

confidence: 99%

Results from Running an Experiment as a Service Platform for Mobile Networks

Peón-Quirós

Mancuso

Comite

et al. 2017

Proceedings of the 11th Workshop on Wireless Network Testbeds, Experimental Evaluation &Amp; CHaracterization

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In this paper we present a selection from a vast range of experiments run with MONROE, our experiment as a service platform open to external researchers. We show that the platform can be used to benchmark network performance in a repeatable and controlled manner thanks to the collection of a rich set of geotagged metadata and the execution of discretionary user experiments. Indeed, with the sheer amount of data collected from 12 commercial mobile operators across Europe, MONROE offers an unprecedented opportunity to monitor, analyze and ultimately improve the status of current and future mobile broadband networks. We also show how flexibly the platform allows combining metadata and experimental data series during the experiments or by means of post-processing, and show results produced by our own experiments as well as by external research groups and developers that have been granted access to the platform. 1 INTRODUCTION The field of networking offers the possibility of gathering large volumes of information from network elements and end hosts. Analyzing these data is crucial to understand how networks perform under different usage patterns and adapt them to future requirements. This is particularly important for mobile broadband networks (MBBs), which are the segment with the strongest growth forecast and higher variability in operating conditions. Two main

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Exploring DSCP modification pathologies in mobile edge networks

Cited by 10 publications

References 14 publications

Investigating the Delay Impact of the DiffServ Code Point (DSCP)

Investigating the Delay Impact of the DiffServ Code Point (DSCP)

Exploring Usable Path MTU in the Internet

Results from Running an Experiment as a Service Platform for Mobile Networks

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