Re: [LARTC] RE: http bandwidth control

[Guillermo Gomez <ggomez@neotechgw.net>]

THANX Ed

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.

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?

Regards
Guillermo

On Thu, 2004-06-24 at 07:07, Ed Wildgoose wrote:
> >The major issue i have is giving incoming priority on VPN clients and
> >slowing down incoming email traffic (huge).
> >  
> >
> ...
> 
> >I'm trying the wondershaper as a quick solution also but don't know how
> >"see if it's working or not"... 
> >
> 
> I would recommend this script as a better starting point
> http://digriz.org.uk/jdg-qos-script/
> 
> Andy has some other ideas, that perhaps he will post?  However, in your 
> case you want to look at the incoming part.  At the moment there is an 
> HTB qdisc with an RED queue on it.  I found good results by copying that 
> chunk of code and making a 1:22 queue, changing the iptables stuff to 
> filter to that one by default and the original queue only for high 
> priority incoming (perhaps you could even go further and setup lots of 
> incoming for different priorities). 
> 
> You then just tweak the ipfilter stuff below to apply appropriate fwmark 
> options and then things will end up in the appropriate buckets and be 
> rate limited.
> 
> You can use the option "pollbuckets" on this script to see whether it's 
> working or not.
> 
> The key point is that it's hard to control incoming.  All you can really 
> do is drop packets.  However, the *idea* of RED is to proactively drop a 
> few to try and slow rates down before queing starts.  It is debatable 
> whether it works and some people think it may work better to avoid the 
> RED altogether...
> 
> Of course you can also only queue on an outgoing interface, so you 
> either need to have a bridge/router setup so that stuff for your local 
> net is effectively "going out" on the local net card.  Or else you use 
> the IMQ device to act as a kind of device in front of your normal 
> incoming card so that you now have an outbound interface on that (which 
> is effectively inbound to your normal internet facing card) - does that 
> make sense?  IMQ is like sticking another device in front of your 
> existing device?  Anyway, it does what you want.
> 
> Ed W
-- 
Guillermo Gomez <ggomez@neotechgw.net>
neotech

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