NDLI: The role of packet-dropping mechanisms in QoS differentiation

Content Provider	IEEE Xplore Digital Library
Author	Quadros, G. Alves, A. Monteiro, E. Boavida, F.
Copyright Year	2000
Description	Author affiliation: Centro de Inf. e Sistemas, Coimbra Univ., Portugal (Quadros, G.)
Abstract	Many research teams are developing technologies to turn the Internet into a QoS-capable network, which is one of the biggest challenges that this communication system currently faces. Naturally, at the core of such a challenge are IP routers and the technology they use. It is a well known fact that the common packet scheduling discipline that is used in routers (first come first served) makes them useless when QoS is needed. Thus, a different type of packet scheduling must be used. One of the most referred solutions for QoS-capable systems is the weighted fair queuing (WFQ) discipline. For FreeBSD-based routers, the ALTQ implementation of the WFQ discipline is, of course, an eligible and natural choice. Given this, it is important to fully understand the characteristics and operational behaviour of such an implementation. This paper presents several tests that guide the reader to a detailed knowledge about the WFQ/ALTQ operation-its behaviour, weaknesses, and flaws-with the purpose of showing how relevant can the influence of the dropper mechanism be on the effectiveness of IP routers.
Starting Page	318
Ending Page	324
File Size	583816
Page Count	7
File Format	PDF
ISBN	0769507778
DOI	10.1109/ICON.2000.875808
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-08
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Quality of service Testing IP networks Scheduling algorithm Traffic control Proposals Intelligent networks Web and internet services Telecommunication traffic Protection
Content Type	Text
Resource Type	Article

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