10 Jan

Build bandwidth manager on linux with TC, HTB, IMQ

By Acang

Previously we already build Bandwidth management with connection marking, you can read on Build bandwidth manager on linux with TC, HTB and iptables mark connection and Build bandwidth manager on linux with TC, HTB, IFB. is quitely same as ifb, but we use imq as dummy device

topologi internet --- (eth0, 192.168.1.1/24) linux gateway (eth1, 192.168.80.1/20) --- client

hope this article help you

Step by step

  1. set up your linux internet gateway
  2. set up iptables
  3. setup TC with IMQ

1. set up your linux internet gateway

you can follow previous article at Build router internet gateway on ubuntu linux

2. set up iptables

execute this to redirect all incomming packet through eth1 to imq0 dummy device
"iptables -t mangle -A PREROUTING -i eth1 -j IMQ --todev 0"

3. setup TC with IMQ

execute this to create parent upload, with max upload 10Mbps
#---upload limit parent---
"/sbin/tc qdisc del dev imq0 root"
"/sbin/tc qdisc add dev imq0 root handle 1: htb default 255 r2q 10"
"/sbin/tc class add dev imq0 parent 1: classid 1:10 htb rate 10240Kbit"

#---upload limit for 192.168.80.2 client, with max upload bandwidth 1Mbps, and lower bandwidth 25Kbit---
"/sbin/tc class add dev imq0 parent 1:10 classid 1:102 htb rate 25Kbit ceil 1024Kbit prio 5"
"/sbin/tc qdisc add dev imq0 parent 1:102 handle 102: sfq perturb 10"
"/sbin/tc filter add dev imq0 parent 1: protocol ip prio 100 u32 match ip src 192.168.80.2 flowid 1:102"

#---upload limit for 192.168.80.3 client, with max upload bandwidth 2Mbps, and lower bandwidth 25Kbit---
"/sbin/tc class add dev imq0 parent 1:10 classid 1:103 htb rate 25Kbit ceil 2048Kbit prio 5"
"/sbin/tc qdisc add dev imq0 parent 1:103 handle 103: sfq perturb 10"
"/sbin/tc filter add dev imq0 parent 1: protocol ip prio 100 u32 match ip src 192.168.80.3 flowid 1:103"

execute this to create parent udownload
#---upload limit parent, with max download 100Mbps---
"/sbin/tc qdisc del dev eth1 root"
"/sbin/tc qdisc add dev eth1 root handle 1: htb default 255 r2q 10"
"/sbin/tc class add dev eth1 parent 1: classid 1:20 htb rate 102400Kbit"

#---upload limit for 192.168.80.2 client, with max download bandwidth 3Mbps, and lower bandwidth 256Kbit---
"/sbin/tc class add dev eth1 parent 1:20 classid 1:102 htb rate 256Kbit ceil 3072Kbit prio 5"
"/sbin/tc qdisc add dev eth1 parent 1:102 handle 102: sfq perturb 10"
"/sbin/tc filter add dev eth1 parent 1: protocol ip prio 100 u32 match ip dst 192.168.80.2 flowid 1:102"

#---upload limit for 192.168.80.3 client, with max download bandwidth 5Mbps, and lower bandwidth 256Kbit---
"/sbin/tc class add dev eth1 parent 1:20 classid 1:103 htb rate 256Kbit ceil 5120Kbit prio 5"
"/sbin/tc qdisc add dev eth1 parent 1:103 handle 103: sfq perturb 10"
"/sbin/tc filter add dev eth1 parent 1: protocol ip prio 100 u32 match ip dst 192.168.80.3 flowid 1:103"

you can make it permanent by fill above command on /etc/rc.local file

thats it, you can test it with external tools like speedtest.net

i dont create the image, i got from icon-library.com