[email protected] (mailing list, the only place to send questions!) to lartc. org and a git tree for the website (including LARTC HOWTO. The best guide you will find online to LARTC is the Linux Advanced Routing and Shaping HOWTO. If you find this strategy too complicated to. Linux Advanced Routing & Traffic Control HOWTO. Bert Hubert. Netherlabs BV. @ Thomas Graf (Section Author). tgraf%

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The Quick Guide to LARTC plus five alternative methods

A section discussing the techniques for measuring traffic. You can also restrict the throughput of certain types of traffic and prioritize others through policy-based routing.

Asking questions on the list is far more net-friendly. Broadly speaking, this HOWTO was written with a sophisticated user in mind, perhaps one who has already had experience with traffic control under Linux. The switches on your system will maintain different route maps for different tags.

An archive of the new mailing list is available. This HOWTO purports to introduce the concepts of traffic controlthe traditional elements in generalthe components of the Linux traffic control implementation and provide some guidelines.

Show all 2 comments. In particular, the following items will be added at some point to this documentation. Although I have made every effort to verify the factual correctness of the content presented herein, I cannot accept any responsibility for actions taken under the influence of this documentation.

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More details on tcng. However, you probably will never need all of the techniques of LARTC all at the same time howfo across your networks. A section covering meters. This site attempts to document how to configure and use these features. If you have any expertise in any of these areas, please pitch in. A section of examples. In most network traffic scenarios, you have the time and power to analyze traffic and expand or adapt resources accordingly.

I assume that the reader may have no prior traffic control experience. So if you want to ask us a question, subscribe to the new mailing listand ask it! So, you can run your digital telephone service over your data network, keeping both types of traffic distinct.


A GIT tree is available. The receiving router then makes its own decision on where the next hop will be.

I assume that the reader is comfortable with UNIX concepts and the command line and has a basic knowledge of IP networking. At the switch level, you need to consider Shortest Path Bridging SPBwhich will divert traffic onto an alternative path if the obvious route is congested. An archive of the old mailing list is also available, and google has picked it up as well.

Queuing algorithms enable you to manage the traffic through switches when links get congested and class-based queuing is one of the most prevalent strategies. The controller of each network is its router.

1. Introduction to Linux Traffic Control

Few inside the community and fewer outside the Linux community are aware of the tremendous power of the traffic control subsystem which has grown and matured under kernels 2. Consider these simpler solutions before you opt for the complex and composite methodologies that create the Linux Advanced Routing and Traffic Control.

At first, this language may seem daunting, but mastery of these basics will quickly provide the user with a much wider ability to employ and deploy traffic control configurations than the direct use of tc would afford. In some situations, particularly when serving the publicdemand can be unpredictable. Missing content, corrections and feedback. This technique does require a certain amount of physical network link duplication. A Korean translation can be found on here.

Target audience and assumptions larhc the reader. If you just want to post, and not receive mail, you can indicate this on the Mailman mailinglist management page. Polish translation is here. This site uses Akismet to reduce spam.

So, data units marked with the 0 band will get passed through before any datagram in the queue that is marked with a 1. Lartd one router nowto the world goes offline or is overwhelmed with traffic, all of partc routers laryc connect to it will quickly notice and alter their routing tables to take that router off the list.


Bert Hubert has offered to continue larttc the old mailing list archives at http: Files were last updated at So, this technique is just another way to prioritize traffic using the class-based concept. The Border Gateway Protocol is the only routing methodology in operation on the internet. The danger of congestion on the network can be headed off by specifying the behavior of switches. I may not supply examples in both the tcng language and the tc command line, so the wise user will have some familiarity with both.

The Quick Guide to LARTC plus five alternative methods | Comparitech

You can implement QoS in an Apache web howtl as well. Latc involves instructing your routers and switches to use some other method instead of the default Border Gateway Protocol BGP in order to select the adjacent network onto which it should forward data. I strongly recommend to the eager reader making a first foray into the discipline of traffic control, to become only casually familiar with the tc command line utility, before concentrating on tcng.

The larger Linux community is very familiar with the tools available under Linux for packet mangling and firewalling netfilter, and before that, ipchains as well as hundreds of network services which can run on the operating system. The classes are identified by a number, starting with 0 and incrementing sequentially.

LARTC is sometimes used for load balancing — getting routers to stand in for each other when one is approaching full capacity. For example, QoS can help reserve bandwidth to make specific applications available all of the time at the cost of others in the event of a traffic surge. On private networks, you have the option of specifying exact routes to a destination rather than letting the router work out the best path.

For users with newer kernels 2. Please note that due to excessive spam the list has become ‘members only’ – so please subscribe first!