Kenjiro Cho, "Managing traffic with ALTQ," Proceedings of USENIX Annual Technical Conference: FREENIX Track, pp. 121--128, June 1999. Home/Search Document Details and Download
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A Bandwidth Management and Pricing Proxy - Poulton, Clayton, Jacot-Guillarmod (2000) (Correct)
....at varying granularities from ports (service) to IP addresses. Flows are then monitored and policed. The operation of the Packeteer flow control firmware is described later in this paper. This solution is relatively expensive, costing upward of R 30000. ALTQ is a traffic management project [2]. ALTQ is a Free BSD queuing platform for PC routers. It allows various queuing disciplines to be deployed including class based queuing (CBQ) and weighted fair queuing (WFQ) The interface buffer is redefined into the required number of queues (for different classes) and then services each queue ....
Kenjiro Cho, "Managing Traffic with ALTQ", Proceedings of USENIX 1999.
Approach to the Dynamic Forwarding of Packets in a .. - Quadros, Alves.. (1999) (Correct)
....to QoS changes. Its design integrates widely used technologies it was conceived for a FreeBSD system and uses the ALTQ approach as an alternative to IP queuing system (the common queuing scheme implemented by BSD Unix, the tail drop FIFO, is too simple and do not provide QoS guarantees) [Cho98, Cho99]. 1 Communications and Telematic Laboratory of the University of Coimbra. This paper is structured as follows: section 2 introduces our approach to the dynamic forwarding of packets based on QoS needs. Section 3 presents the prototype we are developing and discusses the main challenges we faced ....
....problems we faced when designing our prototype was the need for an alternative queuing discipline other than the traditional FIFO queuing one. Rather than strongly modify a BSD UNIX kernel to handle a different queuing method, we decided to use the FreeBSD [FreeBSD] system with the ALTQ mechanism [Cho98,Cho99]. ALTQ is a queuing framework designed to support different queuing disciplines and it is implemented as an extension to the FreeBSD kernel. With this technology, we substituted the single IP output queue by several ones (as many as the number of classes) that actually support the packet scheduler ....
Kenjiro Cho, Managing Traffic with ALTQ, in USENIX
How Unfair can Weighted Fair Queuing be? - Quadros, Alves, Monteiro, Boavida (2000) (Correct)
....hosts. Our foremost approach was to look for schedulers developed for this platform, able to substitute the traditional FIFO mechanism and to give systems the characteristics we wanted. We admitted that the weighted fair queuing implementation developed in the ALTQ project WFQ ALTQ [Cho98, Cho99], would be an interesting starting platform. Thus, we submitted this scheduler to a diverse set of tests. The purpose was to determine the real WFQ ALTQ capacity to differentiate and control the performance provided to different traffic classes. This document presents and analyses the tests made ....
Kenjiro Cho, Managing Traffic with ALTQ, in Proceedings of USENIX 1999 Annual Technical Conference: FREENIX Track, Monterey CA, June 1999. www.usenix.org/events/usenix99/technical_freenix.html
An Effective Scheduler for IP Routers - Quadros, Alves, Monteiro, Boavida (2000) (Correct)
....in the Internet. A fundamental step for the development of the intended service model was the selection of an alternative for the common but useless for this purpose FIFO discipline used in routers. As we are using Intel FreeBSD platforms at LCT UC, we decided to use the ALTQ technology [Cho98, Cho99] as an alternative for the IP queuing system. Given the architectural aspects of the model we are working on, we admitted that the WFQ discipline would be an interesting choice. Summing up, we decided to use the ALTQ implementation of WFQ in our project, and so we submitted it to tests. The ....
Kenjiro Cho, Managing Traffic with ALTQ, in Proceedings of USENIX 1999 Annual Technical Conference: FREENIX Track, Monterey CA, June 1999. www.usenix.org/events/usenix99/technical_freenix.html
Penalty Shaper to Enforce Assured Service for TCP Flows - Lochin, Anelli, Fdida (Correct)
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Kenjiro Cho, "Managing traffic with ALTQ," Proceedings of USENIX Annual Technical Conference: FREENIX Track, pp. 121--128, June 1999.
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