Re: [LARTC] RE: http bandwidth control

[Ed Wildgoose <lists@wildgooses.com>]

>Give me sometime to understand what u said !
>I went into the Howto and started reading all over.
>Discovered what imq devices are, and remembered what ESFQ was.
>Also went to the http://digriz.org.uk/jdg-qos-script/ ans started
>studying it.
>  
>

You just have to plough through the Howto.  Basically though these 
things classify the *outgoing* data into a couple of queues, then they 
release the packets at a programmable maximum rate.  You can either do 
the filtering in "tc", or just do it in iptables (more flexible).

The key thing is that its outgoing stuff only, so you either do it on a 
machine that is routing (cos then the other interface will effectively 
be your "out" one).  Or you use IMQ on the incoming interface, which 
simulates having something just in front of the normal interface (hence 
you can attach outgoing filters to it).

The various qdiscs differ in implementation and number of params, but 
that is the basic idea.  HTB is the simplest because you just create a 
couple of queues and set rates on them - everything else is done in 
iptables.

>My kernel is  2.4.18-14 (RH8) and planing to upgrade to FC1 (not yet
>confident with FC2).
>
>How can i know if both IMQ and ESFQ is available in my actual kernel?
>  
>

Hmm, well the script will error if you haven't.  Redhat has a lot of 
stuff compiled in, but if not then you are going to have a lot of 
compiling ahead.  You need a new kernel, new tc, and each will need 
patches because neither of these things is mainstream yet....  It's not 
hard if you have done this before (takes 20 mins), but if you haven't 
then it's going to need you to set an afternoon aside to learn how to do 
it (there are dozens of sites on how to compile the kernel)

Good luck

Ed W

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