[LARTC] Problem with htb and fwmark

[LARTC] Problem with htb and fwmark

[Morten Isaksen]

Hi!

I am trying to prioritize udp traffic to satisfy our gamers.

The setup is

800 users

                 / 8 Mbit fiber (eth3)
LAN (eth0) - FW -
                 \ 6 Mbit FWA (eth2)

The 8 Mbit is the default gw and the FWA is currently only used by our proxy
server


I am using this script:

$IP rule add fwmark 1 table 100 pref 1000
$IP route add table 200 scope global nexthop via 213.173.228.1 dev eth2

tc filter del dev eth0 prio 3
tc qdisc del dev eth0 root handle 1:
tc qdisc add dev eth0 root handle 1: htb default 12
tc class add dev eth0 parent 1: classid 1:1 htb rate 10Mbit ceil 14Mbit
burst 2k

# Class for UDP, ICMP, ssh traffic
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 1MBit ceil 4Mbit
burst 2k prio 0

# Class for all traffic to our servers
tc class add dev eth0 parent 1:1 classid 1:11 htb rate 3Mbit ceil 10Mbit
burst 2k prio 1

# All other traffic
tc class add dev eth0 parent 1:1 classid 1:12 htb rate 6Mbit ceil 8Mbit
burst 2k prio 3

tc qdisc add dev eth0 parent 1:10 handle 20: sfq perturb 10
tc qdisc add dev eth0 parent 1:11 handle 30: sfq perturb 10
tc qdisc add dev eth0 parent 1:12 handle 40: sfq perturb 10

tc filter add dev eth0 parent 1: protocol ip prio 3 handle 4 fw flowid 1:10
tc filter add dev eth0 parent 1: protocol ip prio 3 handle 5 fw flowid 1:11

iptables -t mangle -A PREROUTING -i eth0 -p udp -j MARK --set-mark 4

iptables -t mangle -A PREROUTING -i eth0 -p tcp --dport 22 -j MARK
--set-mark 4
iptables -t mangle -A PREROUTING -s 10.10.10.3 -i eth0 -j MARK --set-mark 5
iptables -t mangle -A PREROUTING -s 10.10.10.4 -i eth0 -j MARK --set-mark 5
iptables -t mangle -A PREROUTING -s 10.10.10.5 -i eth0 -j MARK --set-mark 5
iptables -t mangle -A PREROUTING -s 10.10.10.12 -j MARK --set-mark 2

The problem is that the all the traffic is going to the default class no
matter what I do.

I can see that the counters in "iptables -t mangle -L -v -n" is counting up,
but the counters in "tc -s class ls dev eth0" is not.

I have also tried not to use fwmark but added the rules directly with "tc
filter...", but with same results...

Have I forgotten something, or what is the problem?


--
Morten Isaksen
misak@aub.dk - http://www.aub.dk/~misak
 


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Re: [LARTC] Problem with htb and fwmark

[Steen Suder, privat]

Morten Isaksen wrote:
> Hi!
> 
> I am trying to prioritize udp traffic to satisfy our gamers.

<SNIP>

> I can see that the counters in "iptables -t mangle -L -v -n" is counting up,
> but the counters in "tc -s class ls dev eth0" is not.
> 
> I have also tried not to use fwmark but added the rules directly with "tc
> filter...", but with same results...
> 
> Have I forgotten something, or what is the problem?

I have the exact same problem here; has anyone found the reason and/or a 
fix?

I use 2.4.22 here. I worked with 2.4.20.

-- 
Mvh. / Best regards,
Steen Suder		<http://www.suder.dk/>
ICQ UIN			4133803

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Re: [LARTC] Problem with htb and fwmark

[Catalin BOIE]

> > Have I forgotten something, or what is the problem?
>
> I have the exact same problem here; has anyone found the reason and/or a
> fix?

Post your scripts to this list.

>
> I use 2.4.22 here. I worked with 2.4.20.
>
> --
> Mvh. / Best regards,
> Steen Suder		<http://www.suder.dk/>
> ICQ UIN			4133803
>
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>

---
Catalin(ux) BOIE
catab@deuroconsult.ro
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Re: [LARTC] Problem with htb and fwmark

[Steen Suder, privat]

Morten Isaksen wrote:
> Hi!
> 
> I am trying to prioritize udp traffic to satisfy our gamers.

<SNIP>

> The problem is that the all the traffic is going to the default class no
> matter what I do.
> 
> I can see that the counters in "iptables -t mangle -L -v -n" is counting up,
> but the counters in "tc -s class ls dev eth0" is not.
> 
> I have also tried not to use fwmark but added the rules directly with "tc
> filter...", but with same results...
> 
> Have I forgotten something, or what is the problem?

<http://luxik.cdi.cz/~devik/qos/htb/htbfaq.htm> says:

"All packets are dropped when "default" is set to nonleaf

Yes. Default kwyword must point to leaf or be 0 (so unclassified packets 
go thru directly). If you want to "direct" other packets to non-leaf do 
it by catch all filter with the largest "pref". "


This smells like something related...

-- 
Mvh. / Best regards,
Steen Suder		<http://www.suder.dk/>
ICQ UIN			4133803

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Re: [LARTC] Problem with htb and fwmark

[Steen Suder, privat]

Steen Suder, privat wrote:
> Morten Isaksen wrote:
> 
>> Hi!
>>
>> I am trying to prioritize udp traffic to satisfy our gamers.
> 
> 
> <SNIP>
> 
>> I can see that the counters in "iptables -t mangle -L -v -n" is 
>> counting up,
>> but the counters in "tc -s class ls dev eth0" is not.
>>
>> I have also tried not to use fwmark but added the rules directly with "tc
>> filter...", but with same results...
>>
>> Have I forgotten something, or what is the problem?
> 
> 
> I have the exact same problem here; has anyone found the reason and/or a 
> fix?
> 
> I use 2.4.22 here. I worked with 2.4.20.

By some sort of accident I found the cause for the "problem" (here at 
least):

Make sure that the attached (to the root in case of HTB) filters 
actually filters the packets to the leaves (leafs?) in the (pseudo-)tree.

Then, if filters are correctly designed, no traffic will go to HTB default.

-- 
Mvh. / Best regards,
Steen Suder		<http://www.suder.dk/>
ICQ UIN			4133803

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