#
#  Add output delay, jitter and packet loss.
#
#                                       +-- delay                        +-- lost percent
#                  +-- interface        |    +-- jitter                  |   +-- burst
#                  v                    v    v                           v   v
tc qdisc add dev eth1 root netem delay 10ms 1ms distribution normal loss 4% 10%

# Change.
tc qdisc change dev eth1 root netem delay 10ms 1ms distribution normal loss 4% 10%

# Delete.
tc qdisc del dev eth1 root netem