8. Advanced Queuing Topics
Published Online: 20 DEC 2010
DOI: 10.1002/9780470976814.ch8
Copyright © 2011 John Wiley & Sons Ltd.
Book Title
QOS-Enabled Networks: Tools and Foundations
Additional Information
How to Cite
Barreiros, M. and Lundqvist, P. (2011) Advanced Queuing Topics, in QOS-Enabled Networks: Tools and Foundations, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9780470976814.ch8
Publication History
- Published Online: 20 DEC 2010
- Published Print: 7 JAN 2011
ISBN Information
Print ISBN: 9780470686973
Online ISBN: 9780470976814
- Summary
- Chapter
- References
Keywords:
- advanced queuing topics, debate about optimal size of queues - different memory allocation techniques;
- advanced scenarios, over-provisioning and guaranteed rates - in large-scale queues to differentiate shaping rates;
- modern QOS scenarios and implementations - multiple levels of scheduling and shaping;
- Broadband Service Router (BSR),10-Gbps Gigabit Ethernet link to switch - two connections between switch and two DSLAM switches, being both Gigabit Ethernet links;
- subscribers, traffic contracts with different services and rates - traffic from subscribers, shaped to align with service contract;
- next layer of shaping, occurring on VLANs - existing within each S-VLAN;
- QOS scheduling on a large scale, units and schedulers - propagating important traffic;
- memory allocation dynamic (MAD) - logic of implementing MAD, simple, but actually relatively complex;
- TCP protocols, concept of rate optimization windows - as congestion windows and receiving windows;
- differentiating traffic inside a queue with WRED - traffic types, sharing same queue, necessary to differentiate between them
Summary
This chapter contains sections titled:
Hierarchical Scheduling
Queues Lengths and Buffer Size
Dynamically Sized versus Fixed-Size Queue Buffers
RED – Random Early Discard
Using RED with TCP Sessions
Differentiating Traffic Inside a Queue with WRED
Head versus Tail RED
Segmented and Interpolated RED Profiles
Conclusion
Further Reading