projects/trafficcontrol/trafficcontrol.sh

#!/bin/bash

IF0=eth0
IF1=eth2

function clear_tc()
{
        tc qdisc del dev $IF0 root 2>/dev/null >/dev/null
        tc qdisc del dev $IF1 root 2>/dev/null >/dev/null
}

if [ "$1" == "clear" ] ; then
        clear_tc
        exit
fi


if [ $# -lt "3" ] ; then
        echo "Usage: $0 <bandwidth> <delay> <delay-variation> [packet-loss]"
        echo "eg.: $0 2mbit 100ms 10ms"
        echo "eg.: $0 56kbit 100ms 10ms 0.8%"
        echo ""
        echo "or: $0 clear"
        exit
fi

DIST="distribution normal"

if [ $3 == "0ms" ] ; then 
        DIST=""
fi


clear_tc

tc qdisc add dev $IF0 root handle 1: tbf rate $1 buffer 100000 limit 300000
tc qdisc add dev $IF0 parent 1:1 handle 2: netem delay $2 $3 $DIST

tc qdisc add dev $IF1 root handle 1: tbf rate $1 buffer 100000 limit 300000

if [ $# == "4" ] ; then
        #packetloss fails if the simulated bandwidth is to small
        tc qdisc add dev $IF1 parent 1:1 netem loss $4
fi

tc qdisc
1	torben	110	#!/bin/bash
2
3			IF0=eth0
4			IF1=eth2
5
6			function clear_tc()
7			{
8			tc qdisc del dev $IF0 root 2>/dev/null >/dev/null
9			tc qdisc del dev $IF1 root 2>/dev/null >/dev/null
10			}
11
12			if [ "$1" == "clear" ] ; then
13			clear_tc
14			exit
15			fi
16
17
18			if [ $# -lt "3" ] ; then
19			echo "Usage: $0 <bandwidth> <delay> <delay-variation> [packet-loss]"
20			echo "eg.: $0 2mbit 100ms 10ms"
21			echo "eg.: $0 56kbit 100ms 10ms 0.8%"
22			echo ""
23			echo "or: $0 clear"
24			exit
25			fi
26
27			DIST="distribution normal"
28
29			if [ $3 == "0ms" ] ; then
30			DIST=""
31			fi
32
33
34			clear_tc
35
36			tc qdisc add dev $IF0 root handle 1: tbf rate $1 buffer 100000 limit 300000
37			tc qdisc add dev $IF0 parent 1:1 handle 2: netem delay $2 $3 $DIST
38
39			tc qdisc add dev $IF1 root handle 1: tbf rate $1 buffer 100000 limit 300000
40
41			if [ $# == "4" ] ; then
42			#packetloss fails if the simulated bandwidth is to small
43			tc qdisc add dev $IF1 parent 1:1 netem loss $4
44			fi
45
46			tc qdisc