LARTC - Jul 2005 - HTB as a child of another HTB - doesn''t work

Hi,

I am new to HTB and in the learning process I want to simulate a slower
link on my server to see how qdisc works.

I have a 100Mbit connection.

I want to simulate a 100K connection and to divide traffic between FTP
and SMB. (like in HTB user guide).

The problem is that it doesn’t work. I can transfer files with FTP of
SAMBA at the wire speed. (Just like when there was no HTB and qdisc).
What do I do wrong?

Here is my script:

#!/bin/bash

tc qdisc del dev eth0 root
iptables -F
iptables -F -t mangle

# qdisc for delay simulation
tc qdisc add dev eth0 root handle 100: htb
tc class add dev eth0 parent 100: classid 100:1 htb rate 100kbps

tc qdisc add dev eth0 parent 100:1 handle 1: htb

tc class add dev eth0 parent 1: classid 1:1 htb rate 100kbps
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50kbps ceil 100kbps prio
1
tc class add dev eth0 parent 1:1 classid 1:20 htb rate 50kbps ceil 100kbps prio
2

tc qdisc add dev eth0 parent 1:10 handle 22: sfq perturb 10
tc qdisc add dev eth0 parent 1:20 handle 23: sfq perturb 10

I''ve tried with u32 and with fw filter

tc filter add dev eth0 parent 1: protocol ip u32 match ip sport 20 0xffff flowid
1:10
tc filter add dev eth0 parent 1: protocol ip u32 match ip sport 139 0xffff
flowid 1:20

OR

iptables -A OUTPUT -o eth0 -t mangle -p tcp --sport 20 -j MARK --set-mark 22
tc filter add dev eth0 parent 1: protocol ip handle 22 fw classid 1:10

iptables -A OUTPUT -o eth0 -t mangle -p tcp --sport 445 -j MARK --set-mark 33
tc filter add dev eth0 parent 1: protocol ip handle 33 fw classid 1:20

Best regards,

ddaas


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On Friday 22 July 2005 14:59, ddaasd wrote:
> What do I do wrong?
Most likely, you do not want to use more than one HTB qdisc per device.
> tc qdisc add dev eth0 root handle 100: htb
> tc class add dev eth0 parent 100: classid 100:1 htb rate 100kbps
>
> tc qdisc add dev eth0 parent 100:1 handle 1: htb
What do you need this qdisc for?
> tc class add dev eth0 parent 1: classid 1:1 htb rate 100kbps
> tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50kbps ceil
> 100kbps prio 1 tc class add dev eth0 parent 1:1 classid 1:20 htb rate
> 50kbps ceil 100kbps prio 2
Why not make these children of the first qdisc?
> <br>
> <br>
> <font face="verdana, arial, helvetica"
size="2">OR<br>
> <br>
> </font>
Please don''t send HTML mails (or at least include a text-only version).
Otherwise it is really awful to read. Thanks.

HTH
Andreas

On Friday 22 July 2005 14:59, ddaasd wrote:

 >> What do I do wrong?
 >>
 >>
 >>Most likely, you do not want to use more than one HTB qdisc per device.

What about the example from the HTB User Guide?? Is it wrong?

http://luxik.cdi.cz/~devik/qos/htb/manual/userg.htm#prio




 >>Please don''t send HTML mails (or at least include a text-only
>>version).
 >>Otherwise it is really awful to read. Thanks.


Sorry, I didn''t know..L :(


 >>HTH
 >>Andreas


Thanks,
ddaas

On Saturday 23 July 2005 13:07, ddaas wrote:
>  >>Most likely, you do not want to use more than one HTB qdisc per
>  >> device.
>
> What about the example from the HTB User Guide?? Is it wrong?
Ah, you want to simulate a slow link. Didn''t realize that, sorry. :-)

Have a look on the output of the tc -s -d class show dev $dev statistics.
Also try qdisc show instead of class show, the direct_packets_stat should 
be zero.

The packets should go into the class 100:1 (you may have to add "default
1"
or a filter that puts them there). So far you only got one filter for the 
child qdisc, but for that the packets have to get there first.

HTH
Andreas