Re: [LARTC] Transfer rate above the desired (tc+htb)

[Alvaro Motta <alvarolmmotta@gmail.com>]

Hi Andy, thanks for your reply.

I don't see why the src should be the culprit, since the AB segment is
10.4 network and the BC is 192.168. And IMHO 0.0.0.0/0

Also, after modifying the src, the traffic rate was the same as if no
qdisc were attached to the interface. I even played with the
interfaces and the only way to throttle the traffic, is assigning the
qdisc to the eth0 and having the src and dst as in the script I've
sent.

AL

On 7/20/05, Andy Furniss <andy.furniss@dsl.pipex.com> wrote:
> Alvaro Motta wrote:
> > Hi folks.
> >
> > I started to play with tc+htb last week, and I must confess that this
> > thing is really driving me nuts.
> >
> > All we want to do is control bw, with no borrowing.
> >
> > In order to get the feeling on this subject, I have setup the
> > following test bed.
> >
> > ---A---B---C---
> >
> > On B: eth0 connecting A and eth1 connecting C.
> >
> > The script.
> >
> > tc qdisc del dev eth0 root
> > tc qdisc add dev eth0 root handle 1: htb default 50
> > tc class add dev eth0 parent 1: classid 1:1 htb rate 32kbit ceil 32kbit
> > tc filter add dev eth0 protocol ip parent 1:0 prio 100 u32 match ip
> > src 10.4.0.0/16 match ip dst 0.0.0.0/0 classid 1:1
> 
> Should be src 192.168.0.0/24.
> 
> Andy.
> 
> 
> >
> > If I try to transfer a 1M file from C to A:
> >
> > [root@localpost tmp]# wget 192.168.0.23/1M
> > --09:22:32--  http://192.168.0.23/1M => `1M.8'
> > Connecting to 192.168.0.23:80... connected.
> > HTTP request sent, awaiting response... 200 OK
> > Length: 1,024,000 [text/plain]
> > 100%[===========>] 1,024,000    183.12K/s    ETA 00:00
> > 09:22:38 (182.88 KB/s) - `1M' saved [1,024,000/1,024,000]
> >
> > Wasn't it supposed to be around the 32KB/s?
> >
> > If I play with the numbers (rateÎil) I get the following results:
> > 128k => 404.78 KB/s
> > 64k => 337.9 KB/s
> > 16k => 68.86 KB/s
> > 8k => 31.12 KB/s
> > 1k => 3.77 KB/s
> >
> > I even tried to set the rate to 1kbps in root, but also led to pretty
> > much the same results.
> >
> > With no qdisc, the rate will go close to 1000 KB/s
> >
> > B machine:
> > 2.6.11-1.1369_FC4
> > iproute-2.6.11-1
> > TC HTB version 3.3
> >
> > I have no clue on what I am doing wrong. Could anyone browse the above
> > script and give me hint?
> >
> > Thanks in advance,
> >
> > AL
> > _______________________________________________
> > LARTC mailing list
> > LARTC@mailman.ds9a.nl
> > http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
> >
> 
>
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