tc action mirred

tc_mirred.sh

#!/bin/bash
ip netns add t1
ip netns add t2

ip link add t1 type veth peer name t11
ip link add t2 type veth peer name t22

ip link set t11 netns t1
ip link set t22 netns t2

ip netns exec t1 ip link set t11 address ee:ee:ee:ee:ee:02
ip netns exec t1 ip link set t11 up

ip netns exec t2 ip link set t22 address ee:ee:ee:ee:ee:03
ip netns exec t2 ip link set t22 up

ip link set t1 up
ip link set t2 up

ip netns exec t1 ip addr add 1.1.1.2/24 dev t11
ip netns exec t2 ip addr add 1.1.1.3/24 dev t22

tc qdisc add dev t1 handle ffff: ingress
tc filter add dev t1 parent ffff: u32 match u32 0 0 action mirred egress redirect dev t2

tc qdisc add dev t2 handle ffff: ingress
tc filter add dev t2 parent ffff: u32 match u32 0 0 action mirred egress redirect dev t1

ip netns exec t1 ping -c 1 1.1.1.3
ip netns exec t2 ping -c 1 1.1.1.2

ip netns del t1
ip netns del t2