Delaying network traffic to a specific IP

delay.sh

#!/bin/bash

interface=lo
ip=10.0.0.1
delay=100ms

tc qdisc add dev $interface root handle 1: prio
tc filter add dev $interface parent 1:0 protocol ip prio 1 u32 match ip dst $ip flowid 2:1
tc qdisc add dev $interface parent 1:1 handle 2: netem delay $delay