network: ~$ ip netns | grep qrouter qrouter-a6dd3417-df21-433b-8857-827e895ea3c6 qrouter-3e810636-1f43-4d08-acc2-2edb25a10e0e network: ~$ sudo ip netns exec qrouter-3e810636-1f43-4d08-acc2-2edb25a10e0e route -n ... 0.0.0.0 172.20.6.1 0.0.0.0 UG 0 0 0 qg-900380a6-98 10.5.5.0 0.0.0.0 255.255.255.0 U 0 0 0 qr-52a0ab1a-31 172.20.6.0 0.0.0.0 255.255.255.0 U 0 0 0 qg-900380a6-98 network: ~$ sudo ip netns exec qrouter-3e810636-1f43-4d08-acc2-2edb25a10e0e iptables-save ... -A neutron-l3-agent-snat -j neutron-l3-agent-float-snat -A neutron-l3-agent-snat -s 10.5.5.0/24 -j SNAT --to-source 172.20.6.31 -A neutron-postrouting-bottom -j neutron-l3-agent-snat