Re: [LARTC] limiting bandwidth to one IP

[Stef Coene <stef.coene@docum.org>]

On Sunday 23 December 2001 19:06, Carles Pina i Estany wrote:
> Hi,
>
> I am testing tc and company tools :-)
>
> I have an ADSL with three interfaces (one to ADSL router, one to one net
> and another one to another net).
>
> I am trying to limit the download from Internet to one computer.
>
> I try it (and some variations...):
>
> tc qdisc add dev eth1 root handle 1: cbq bandwidth 256kbit allot 1514 cell
> 8 avpkt 1000 mpu 64
Bandwith must be the real bandwith of the NIC.  Usual 10 or 100 mbit.

> (eth1 is the interface where computer that I want to limit is connected)
>
> tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 256kbit rate
> 128kbit weight 12kbit prio 8 allot 1514 cell 8 maxburst 20 avpkt 1000
> bounded
>
> 256 is my bandwidth (to download)
> 128 is the bandwidth that I want to this computer
> 12kbit I don't know ¿?...
> bounded is to test, only
>
> tc filter add dev eth1 parent 1:0 protocol ip prio 1 u32 match ip dst
> 192.168.0.5 flowid 1:1
>
> But the computer is receiving more than 128kbit.
> If I try:
>
> tc qdisc add dev eth1 root tbf rate 128kbit latency 50ms burst 1540
> Works fine, but I am limiting the whole network (I don't want it)
What you want to do is easy.  But you are using the wrong commands.  I have 
some working scripts.  You can find them on www.docum.org.

But I advise you to use the htb qdisc.  Much easier to set up and to 
understand.  Again, more information on www.docum.org.  If you really want to 
use CBQ, I can give you more information.  Just leave a message on the 
mailing list.

Stef

-- 

stef.coene@docum.org
 More QOS info : http://www.docum.org/
 Title : "Using Linux as bandwidth manager"
     

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