Traffic Shaping using tc
- by Simon
Hi guys,
I have a 1.5 Mbit/s link that i want to share with 150 users.
My setup is the following:
Linux box with 3 NICs
eth0 - public ip
eth1 - subnet A - 50 users (static ips)
eth2 - subnet B - 100 users (via dhcp)
I am using squid as a transparent proxy on port 3128.
dhcp server using ports 67 and 68.
I was creating, but I think packets are not going to the right queues
#!/bin/bash
DEV=eth0
RATE_MAIN=2048kbit
CEIL_MAIN=2048kbit
BURST=1b
CBURST=1b
RATE_DEFAULT=1024kbit
CEIL_DEFAULT=$CEIL_MAIN
PRIO_DEFAULT=3
RATE_P2P=1024Kbit
CEIL_P2P=$CEIL_MAIN
PRIO_P2P=4
RATE_IND=32kbit
CEIL_IND=$CEIL_DEFAULT
tc qdisc del dev $DEV root
tc qdisc add dev $DEV root handle 1: htb default 30
tc class add dev $DEV parent 1: classid 1:1 htb rate $RATE_MAIN ceil $CEIL_MAIN
tc class add dev $DEV parent 1:1 classid 1:10 htb rate $RATE_DEFAULT ceil $CEIL_MAIN burst $BURST cburst $CBURST prio $PRIO_WEB
## some other sub class for p2p other traffic
tc class add dev $DEV parent 1:1 classid 1:20 htb rate $RATE_P2P ceil $CEIL_P2P burst $BURST cburst $CBURST prio $PRIO_P2P
$IPS_NET1=50
$IPS_NET2=100
let $IPS=$IPS_NET1+$IPS_NET2
for ((i=1; i<= $IPS; i++))
do
let CLASSID=($i+100)
let HANDLE=($i+100)
tc class add dev $DEV parent 1:10 classid 1:$CLASSID htb rate $RATE_IND ceil $CEIL_IND
tc qdisc add dev $DEV parent 1:$CLASSID handle $HANDLE: sfq perturb 10
done
## Generate IP addresses ##
IP_ADDRESSES=""
# Subnet A
BASE_IP=10.10.10.
for ((i=2; i<=$IPS_NET1+1; i++))
do
TEMP="$BASE_IP$i"
IP=ADDRESSES="$IP_ADDRESSES $TEMP"
done
# Subnet B
BASE_IP=192.168.0.
for ((i=2; i<=$IPS_NET2+1; i++))
do
TEMP="$BASE_IP$i"
IP_ADDRESSES="$IP_ADDRESSES $TEMP"
done
## FILTERS ##
j=1
U32="tc filter add dev $DEV protocol ip parent 1:0 prio $PRIO_DEFAULT u32"
for NET in $IP_ADDRESSES; do
let CLASSID=($j+100)
$U32_DEFAULT match ip src $NET/32 flowid 1:$CLASSID
$U32_DEFAULT match ip dst $NET/32 flowid 1:$CLASSID
let j=j+1
done
Can you guys help me figure out what's wrong with it?
basically I want my classes to be
1:1 (1.5 Mbit )
1:10 (1024 Kbit) 1:20 (1024 Kbit)
(200 ips each with 32 kbit)
