vrf_overlapping_network.sh

#!/bin/bash

ip link add blue type vrf table 10
ip link add red type vrf table 20

ip netns add ns_pod1
ip netns add ns_pod2

ip link add veth_pod1 type veth peer net1
ip link add veth_pod2 type veth peer net2
ip link set veth_pod1 netns ns_pod1
ip netns exec ns_pod1 ip link set veth_pod1 up
ip link set net1 up
ip link set veth_pod2 netns ns_pod2
ip netns exec ns_pod2 ip link set veth_pod2 up
ip link set net2 up
ip link set net1 master blue
ip link set net2 master red
ip link set blue up
ip link set red up

ip netns exec ns_pod1 ip addr add 2001:100::2/64 dev veth_pod1
ip netns exec ns_pod2 ip addr add 2001:100::4/64 dev veth_pod2
ip addr add 2001:100::1/64 dev net1
ip addr add 2001:100::3/64 dev net2

ping 2001:100::2 -I blue -c 1
ping 2001:100::4 -I red -c 1