Subject: Re: [LARTC] how to change classful netem loss probability?

From: Stephen Hemminger <[email-masked]>
Date: Fri, 28 Apr 2006 10:24:21 -0700

Loss was broken, patch sent.

The following works now:

# tc qdisc add dev eth1 root handle 1:0 netem loss 20%

# tc qdisc add dev eth1 parent 1:1 handle 10: tbf \
  rate 256kbit buffer 1600 limit 3000
# ping -f -c 1000 shell

1000 packets transmitted, 781 received, 21% packet loss, time 3214ms
rtt min/avg/max/mdev = 0.187/0.398/3.763/0.730 ms, ipg/ewma 3.217/0.538 ms

# tc qdisc chang dev eth1 handle 1: netem loss 1%
# ping -f -c 1000 shell

1000 packets transmitted, 990 received, 1% packet loss, time 2922ms
rtt min/avg/max/mdev = 0.187/2.739/3.298/0.789 ms, ipg/ewma 2.924/2.084 ms