Queuing discipline test network

You can test the difference in fairness by queueing discipline.

requirements

• ubuntu 20.04 or later
• container lab
• iproute2
• tc

how to use

1. deploy

# create bridge manually
make bridge

# deploy topology
make deploy

2. change qdisc

• rate limit only : make enable-simple-tc
• rate limit and unfair queue : make enable-unfair-tc
• rate limit and fair queue : make enable-fair-tc

3. evaluation

• Start two iperf server processes at WAN.

sudo ./exec.sh wan iperf3 -s &
# change port
sudo ./exec.sh wan iperf3 -s -p 5301 &

• Run iperf from host A and after a while run iperf from host B.

./exec.sh hostA iperf3 -c 172.16.0.2 -t 9999

./exec.sh hostB iperf3 -c 172.16.0.2 -p 5301 -t 9999

evaluation memo

fair queue (sfq)

host A: about 50 Mbps host B: about 50 Mbps

unfair queue (default, pfifo)

host A: about 60 Mbps host B: about 40 Mbps