Comment 0 for bug 1735866

For DVR, the following iptables rule is missed in the snat namespace:
"-A neutron-l3-agent-snat -j neutron-l3-agent-float-snat"

This results in that snat rules will work instead of floating ip when accessing to the internet.

Adding following code at [1] can fix this:

self.snat_iptables_manager.ipv4['nat'].add_rule('snat',
                                                            '-j $float-snat')

[1]https://github.com/openstack/neutron/blob/master/neutron/agent/l3/dvr_edge_router.py#L197