NDLI: Update consistency in software-defined networking based multicast networks

Content Provider	IEEE Xplore Digital Library
Author	Kohler, T. Durr, F. Rothermel, K.
Copyright Year	2015
Description	Author affiliation: Inst. of Parallel & Distrib. Syst., Univ. of Stuttgart, Stuttgart, Germany (Kohler, T.; Durr, F.; Rothermel, K.)
Abstract	When applying updates on distributed network elements with SDN, intra-update states may violate desired network properties, such as drop- and loop-freeness. Current stateless approaches cannot guarantee the constancy of arbitrary network invariants (correctness) in general, yet update procedures guaranteeing certain invariants do exist. In this paper, we investigate on update consistency for the case of multicast routing and show that there is no correct update procedure w.r.t. both drop- and duplicate-freeness. We show that certain updates of multicast routes inherently raise a concurrency issue, which necessarily results in the occurrence of either drops or duplicates. Furthermore, we present a generic update procedure for multicast routing updates that identifies concurrency-relevant update steps. This procedure allows for the selection of an update strategy, such that either drops or duplicates are avoided. These effects can severely degrade network performance or quality of experience. To investigate the implications of drops and duplicates, we evaluate their frequencies and impact for wide-area network scenarios both, analytically and empirically, through direct measurement in the data plane under update.
Starting Page	177
Ending Page	183
File Size	411806
Page Count	7
File Format	PDF
ISBN	9781467368841
DOI	10.1109/NFV-SDN.2015.7387424
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conferences Bandwidth Routing IP networks Relays
Content Type	Text
Resource Type	Article

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