NetworType: geneve: Unable to reach an instances via its floating IP

Environment:
puppet-neutron-14.4.1-0.20190329020333.a6c6114.el8ost.noarch
python3-neutronclient-6.12.0-0.20190312100012.680b417.el8ost.noarch
openvswitch2.11-ovn-common-2.11.0-0.20190129gitd3a10db.el8fdb.x86_64
rhosp-openvswitch-ovn-host-2.11-0.1.el8ost.noarch
puppet-ovn-14.4.1-0.20190325161758.ab61d61.el8ost.noarch
rhosp-openvswitch-ovn-common-2.11-0.1.el8ost.noarch
openvswitch2.11-ovn-host-2.11.0-0.20190129gitd3a10db.el8fdb.x86_64
openstack-tripleo-heat-templates-10.4.1-0.20190329120340.748499d.el8ost.noarch


Steps to reproduce:

1. Deploy OC with either:
parameter_default:
    NeutronBridgeMappings: 'datacentre:br-ex'
    NeutronExternalNetworkBridge: ''
    NeutronNetworkType: geneve
    NeutronNetworkVLANRanges: tenant:1000:2000
    NeutronTunnelTypes: geneve
or
parameter_default:
    NeutronBridgeMappings: ''
    NeutronExternalNetworkBridge: ''
    NeutronNetworkType: geneve
    NeutronNetworkVLANRanges: tenant:1000:2000
    NeutronTunnelTypes: geneve

2.
Launch aninstance in OC and assign it a floating ip. Make sure the to add the necessary openstack security group rules

3. 
Try to reach the instance via ping (or try to reach the undercloud from the instance).


Result:
(overcloud) [stack@undercloud-0 ~]$ openstack server list                                                                                                                                     
+--------------------------------------+--------------+--------+----------------------------------------+--------+---------+
| ID                                   | Name         | Status | Networks                               | Image  | Flavor  |
+--------------------------------------+--------------+--------+----------------------------------------+--------+---------+
| 2254d8ae-f62c-4d14-9500-b821b2022f77 | after_deploy | ACTIVE | tenantgeneve=192.168.32.75, 10.0.0.185 | cirros | m1.tiny |
+--------------------------------------+--------------+--------+----------------------------------------+--------+---------+




(overcloud) [stack@undercloud-0 ~]$ ping -c1 -w1 10.0.0.185
PING 10.0.0.185 (10.0.0.185) 56(84) bytes of data.

--- 10.0.0.185 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms


[heat-admin@controller-2 ~]$  ovn-nbctl lr-nat-list neutron-6d8ca565-1ea3-4457-a470-1fc187ee90bc
TYPE             EXTERNAL_IP        LOGICAL_IP            EXTERNAL_MAC         LOGICAL_PORT
dnat_and_snat    10.0.0.185         192.168.32.75         fa:16:3e:18:b5:91    82d76a8a-a086-41f9-a0af-173615b42e6b
snat             10.0.0.198         192.168.32.0/24



[heat-admin@controller-2 ~]$  ovn-nbctl lr-nat-list neutron-6d8ca565-1ea3-4457-a470-1fc187ee90bc                                                                                              
TYPE             EXTERNAL_IP        LOGICAL_IP            EXTERNAL_MAC         LOGICAL_PORT
dnat_and_snat    10.0.0.185         192.168.32.75         fa:16:3e:18:b5:91    82d76a8a-a086-41f9-a0af-173615b42e6b
snat             10.0.0.198         192.168.32.0/24



[heat-admin@controller-2 ~]$ ping -c1 -w1 10.0.0.185
PING 10.0.0.185 (10.0.0.185) 56(84) bytes of data.

--- 10.0.0.185 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms




[heat-admin@controller-2 ~]$ ping -c1 -w1 10.0.0.198
PING 10.0.0.198 (10.0.0.198) 56(84) bytes of data.
64 bytes from 10.0.0.198: icmp_seq=1 ttl=254 time=0.923 ms

--- 10.0.0.198 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.923/0.923/0.923/0.000 ms