LinuxQuestions.org - Quality of Service with tc

I've made a QoS script based on wondershaper however it doesn't quite work as expected. As see in the code bellow the class 1:10 doesn't have anything assigned to it and the default class is 1:40. The problem is that some (or even many) packages still end up in the 1:10 class. I think I must be doing something wrong. What can I do to fix it, improve or otherwise make it work?

Currently I'm on a ADSL link soon to become a cable link.

Code:

#!/bin/bash 

#

# shape - DSL/Cable modem outbound traffic shaper and prioritizer.

#            Based on the ADSL/Cable wondershaper (www.lartc.org)

#

# Written by * (2010/02/07)

#

# Set the following values to somewhat less than your actual download 

# uplink speed. In kilobits. Also set the device that is to be shaped.

DEV=eth0

RATEUP=668



# VoIP mac address

VoIPMAC="01:23:45:67:89:ab"



VoIPRATE=128



#########################################################



if [ "$1" = "status" ]

then

        tc -s qdisc ls dev $DEV

        tc -s class ls dev $DEV

        exit

fi



# clean existing uplink qdiscs, hide errors

tc qdisc del dev $DEV root 2> /dev/null > /dev/null

iptables -t mangle -D POSTROUTING -o $DEV -j MYSHAPER-OUT 2> /dev/null > /dev/null

iptables -t mangle -F MYSHAPER-OUT 2> /dev/null > /dev/null

iptables -t mangle -X MYSHAPER-OUT 2> /dev/null > /dev/null



if [ "$1" = "stop" ] 

then 

        echo "Shaping removed on $DEV."

        exit

fi



###### uplink



# add HTB root qdisc

tc qdisc add dev $DEV root handle 1: htb default 40



# add main rate limit classes

tc class add dev $DEV parent 1: classid 1:1 htb rate ${RATEUP}kbit





tc class add dev $DEV parent 1:1 classid 1:10 htb rate $[RATEUP/7]kbit ceil ${RATEUP}kbit prio 0    # ack

tc class add dev $DEV parent 1:1 classid 1:20 htb rate ${VoIPRATE}kbit ceil ${RATEUP}kbit prio 1  # VoIP

tc class add dev $DEV parent 1:1 classid 1:30 htb rate $[RATEUP/7]kbit ceil ${RATEUP}kbit prio 2    # Priority (ssh)

tc class add dev $DEV parent 1:1 classid 1:40 htb rate $[RATEUP/7]kbit ceil ${RATEUP}kbit prio 3    # normal (web, mail)

tc class add dev $DEV parent 1:1 classid 1:50 htb rate $[RATEUP/7]kbit ceil ${RATEUP}kbit prio 4    # bulk (P2P, FTP)



tc filter add dev $DEV parent 1:0 protocol ip handle 10 fw flowid 1:10

tc filter add dev $DEV parent 1:0 protocol ip handle 20 fw flowid 1:20

tc filter add dev $DEV parent 1:0 protocol ip handle 30 fw flowid 1:30

tc filter add dev $DEV parent 1:0 protocol ip handle 40 fw flowid 1:40

tc filter add dev $DEV parent 1:0 protocol ip handle 50 fw flowid 1:50



iptables -t mangle -N MYSHAPER-OUT

iptables -t mangle -I POSTROUTING -o $DEV -j MYSHAPER-OUT



# add fwmark entries to classify different types of traffic 

#iptables -t mangle -A PREROUTING -p tcp -m length --length :64 -j MARK --set-mark 10 # small packets (probably just ACKs)

#iptables -t mangle -A MYSHAPER-OUT -p icmp -j MARK --set-mark 10              # ICMP (ping) - high prio, impress friends

#iptables -t mangle -A PREROUTING -p udp -j MARK --set-mark 10                # DNS name resolution (small packets)

#iptables -t mangle -A PREROUTING -p all -m mac --mac-source ${VoIPMAC} -j MARK --set-mark 20                # VoIP 

#iptables -t mangle -A PREROUTING -p tcp --dport ssh -j MARK --set-mark 30    # secure shell

#iptables -t mangle -A PREROUTING -p tcp --sport ssh -j MARK --set-mark 30    # secure shell

#iptables -t mangle -A PREROUTING -m mark --mark 0 -j MARK --set-mark 40      # redundant- mark any unmarked packets as 26

#iptables -t mangle -A PREROUTING -p tcp --dport 20 -j MARK --set-mark 50    # ftp-data port, low prio



echo "Outbound shaping added to $DEV. Rate: ${RATEUP}Kbit/sec."