A Review of Congestion Management Algorithms on Cisco Routers

This paper presents one of the features of DS (Differentiated Services) architecture, namely the queuing or congestion management. Packets can be put in separate buffer queues, on the basis of DS value. Several forwarding policies can be used to favor high priority packets in different ways. The mai...

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Bibliographic Details
Published inJournal of Computer Science and Control Systems Vol. 5; no. 1; p. 103
Main Authors Szilagyi, Szabolcs, Almasi, Bela
Format Journal Article
LanguageEnglish
Published Oradea University of Oradea 01.05.2012
Subjects
Buffers
Congestion
Control systems
Data processing
Management
Packet switched networks
Priorities
Queueing theory
Queues
Queuing
Routers
Scheduling algorithms
Traffic congestion
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Summary:This paper presents one of the features of DS (Differentiated Services) architecture, namely the queuing or congestion management. Packets can be put in separate buffer queues, on the basis of DS value. Several forwarding policies can be used to favor high priority packets in different ways. The main reason for queuing is that a router must hold a packet in its memory, and meanwhile the outgoing interface is busy with sending another packet. The queuing tools are covered in the order in which they were added as Cisco IOS features: FIFO (First-In First-Out), CQ (Custom Queuing), PQ (Priority Queuing), WFQ (Weighted Fair Queuing), CBWFQ (Class Based Weighted Fair Queuing) and LLQ (Low Latency Queuing). [PUBLICATION ABSTRACT]
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ISSN:1844-6043
2067-2101