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List:       lartc
Subject:    Re: [LARTC] newbie: TC[NG] with (256kbit/s down and 768kbit/s up)
From:       Andy Furniss <andy.furniss () dsl ! pipex ! com>
Date:       2004-05-05 8:34:35
Message-ID: 4098A71B.4060401 () dsl ! pipex ! com
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Andreas Klauer wrote:
> Am Wednesday 28 April 2004 10:42 schrieb Christian Parpart:
> 
>>Could someone show me some simple example code for incress+egress
>>shaping for ppp0 (for a router with clients at eth0)?
> 
> 
> Maybe my script will do: http://www.metamorpher.de/ipshape/
> 
> I don't know about 'simple', but I got a script designed for
> routers in general which have to provide masquerading, port
> forwarding and traffic shaping for several clients in the LAN.
> Even if it looks a bit complicated here and there, I think I got
> it well documented, though. It looks pretty similar to what you
> were trying to do.
> 
> I created this with the help of LARTC (Howto, Stef's docum.org, and
> of course this list) and it has grown a lot lately :-) You can
> specify the IPs of your clients, and bandwidth will be shared
> in a fair manner among them.
> 
> I use HTB, PRIO and SFQ to do that. It works well for me, but I'm
> sure that there is still LOADS of stuff that can be improved.
> I'm always open for suggestions :-)

Nice script - one thing I found was that HTB dequeued packets in pairs - 
with MTU 1500 and your 128kbit up this will hurt latency a bit.

The solution was to change from 1 to 0

#define HTB_HYSTERESIS 0 in net/sched/sch_htb.c

Andy.

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