[LARTC] basic htb setup

Linux Advanced Routing and Traffic Control

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On Thursday 28 February 2002 04:25, Ben wrote:
> Hey all. I'm trying to set up QoS using the HTB qdisc in a very basic
> setup, but it the example shown in the howto doesn't seem to be working=
=2E
> While the packets show up in the correct classes, they appear to be
> completely ignoring the rates, meaning nothing gets shaped.
>
> My setup is that I've got a a bunch of machines behind my firewall/rout=
er:
>
>
> 1.2.3.1      +----------------------------+    10.0.0.1
> 1.2.3.2 -----+eth0  firewall/router   eth1+--- 10.0.0.2
> 1.2.3.3      +----------------------------+    10.0.0.3
>
>
> 10.0.0.1 is nat'd to 1.2.3.1, 10.0.0.2 to 1.2.3.2, etc. eth0 is attache=
d
> to a 768Kbit DSL line, and eth1 to a 100Mb ethernet.
>
> I want to limit the output of 10.0.0.1, but let it borrow from everybod=
y
> else's bandwidth when the bandwidth would go unused. HTB seems ideal fo=
r
> this, and the TC stuff is pretty much identical to the basic one in the
> howto:
>
> tc qdisc add dev eth0 handle 1: root htb default 11
>
> tc class add dev eth0 parent 1: classid 1:1 htb rate 768kbit ceil 768kb=
it
> burst 15k tc class add dev eth0 parent 1:1 classid 1:10 htb rate 160kbi=
t
> ceil 768kbit burst 15k tc class add dev eth0 parent 1:1 classid 1:11 ht=
b
> rate 608kbit ceil 768kbit burst 15k
>
> tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10
> tc qdisc add dev eth0 parent 1:11 handle 10: sfq perturb 10
You use twice handle 10:.  Typo ?

>
> tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src
> 1.2.3.1 flowid 1:10
>
>
> When I start sucking a lot of data from 10.0.0.1 and 10.0.0.2 from outs=
ide
> the firewall, the packets end up in the correct classes (judging by tc =
-s
> -d show dev eth0). But they also are processed at equal rates, not at t=
he
> 160:608 ratio I've specified.
Do you use the full 768kbit ?
When you do tc -s -d class show dev eth0, do you see any packets in class=
=20
1:11?=20
Or better, post the output of that command.

Stef

--=20

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


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