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Traffic Control HOWTOVersion 1.0.2"Oct 2006"
| Revision History |
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| Revision 1.0.2 | 2006-10-28 | Revised by: MAB | | Add references to HFSC, alter author email addresses | | Revision 1.0.1 | 2003-11-17 | Revised by: MAB | | Added link to Leonardo Balliache's documentation | | Revision 1.0 | 2003-09-24 | Revised by: MAB | | reviewed and approved by TLDP | | Revision 0.7 | 2003-09-14 | Revised by: MAB | | incremental revisions, proofreading, ready for TLDP | | Revision 0.6 | 2003-09-09 | Revised by: MAB | | minor editing, corrections from Stef Coene | | Revision 0.5 | 2003-09-01 | Revised by: MAB | | HTB section mostly complete, more diagrams, LARTC pre-release | | Revision 0.4 | 2003-08-30 | Revised by: MAB | | added diagram | | Revision 0.3 | 2003-08-29 | Revised by: MAB | | substantial completion of classless, software, rules,
elements and components sections | | Revision 0.2 | 2003-08-23 | Revised by: MAB | | major work on overview, elements, components and
software sections | | Revision 0.1 | 2003-08-15 | Revised by: MAB | | initial revision (outline complete) |
Traffic control encompasses the sets of mechanisms and operations by
which packets are queued for transmission/reception on a network
interface. The operations include enqueuing, policing, classifying,
scheduling, shaping and dropping. This HOWTO provides an introduction
and overview of the capabilities and implementation of traffic control
under Linux.
- Table of Contents
- 1. Introduction to Linux Traffic Control
- 1.1. Target audience and assumptions about the reader
- 1.2. Conventions
- 1.3. Recommended approach
- 1.4. Missing content, corrections and feedback
- 2. Overview of Concepts
- 2.1. What is it?
- 2.2. Why use it?
- 2.3. Advantages
- 2.4. Disdvantages
- 2.5. Queues
- 2.6. Flows
- 2.7. Tokens and buckets
- 2.8. Packets and frames
- 3. Traditional Elements of Traffic Control
- 3.1. Shaping
- 3.2. Scheduling
- 3.3. Classifying
- 3.4. Policing
- 3.5. Dropping
- 3.6. Marking
- 4. Components of Linux Traffic Control
- 4.1. qdisc
- 4.2. class
- 4.3. filter
- 4.4. classifier
- 4.5. policer
- 4.6. drop
- 4.7. handle
- 5. Software and Tools
- 5.1. Kernel requirements
- 5.2. iproute2 tools (tc)
- 5.3. tcng, Traffic Control Next Generation
- 5.4. IMQ, Intermediate Queuing device
- 6. Classless Queuing Disciplines (qdiscs)
- 6.1. FIFO, First-In First-Out (pfifo and bfifo)
- 6.2. pfifo_fast, the default Linux qdisc
- 6.3. SFQ, Stochastic Fair Queuing
- 6.4. ESFQ, Extended Stochastic Fair Queuing
- 6.5. GRED, Generic Random Early Drop
- 6.6. TBF, Token Bucket Filter
- 7. Classful Queuing Disciplines (qdiscs)
- 7.1. HTB, Hierarchical Token Bucket
- 7.2. HFSC, Hierarchical Fair Service Curve
- 7.3. PRIO, priority scheduler
- 7.4. CBQ, Class Based Queuing
- 8. Rules, Guidelines and Approaches
- 8.1. General Rules of Linux Traffic Control
- 8.2. Handling a link with a known bandwidth
- 8.3. Handling a link with a variable (or unknown) bandwidth
- 8.4. Sharing/splitting bandwidth based on flows
- 8.5. Sharing/splitting bandwidth based on IP
- 9. Scripts for use with QoS/Traffic Control
- 9.1. wondershaper
- 9.2. ADSL Bandwidth HOWTO script (myshaper)
- 9.3. htb.init
- 9.4. tcng.init
- 9.5. cbq.init
- 10. Diagram
- 10.1. General diagram
- 11. Annotated Traffic Control Links
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| Random Linux Commands |
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Telnet
This is a program which enables you to work on a remote machine over a network and display the results on your local system. Use with caution, telnet is a bad security risk, ssh is a secure replacement for telnet.
Common Linux terms
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