Comment 0 for bug 1844915

The environment ：
 3 network + 3 controller + 2compute DVR with L3_HA

 When I use ADD port to router and update router ， In order to connect 2 subnets

VM1 ping VM2：

    64 bytes from 172.16.1.10: seq=0 ttl=63 time=1.093 ms (DUP!)
    64 bytes from 172.16.1.10: seq=0 ttl=63 time=1.205 ms (DUP!)
    64 bytes from 172.16.1.10: seq=0 ttl=63 time=1.294 ms (DUP!)
    64 bytes from 172.16.1.10: seq=0 ttl=63 time=1.369 ms (DUP!)

[root@SCSP02557 ~]# neutron router-port-list vpn_connect
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
+--------------------------------------+-------------------------------------------------+----------------------------------+-------------------+---------------------------------------------------------------------------------------+
| id | name | tenant_id | mac_address | fixed_ips |
+--------------------------------------+-------------------------------------------------+----------------------------------+-------------------+---------------------------------------------------------------------------------------+
| 7877c303-96e1-4a1f-8175-36e70cab4490 | | e2f2bedbdf794ad0a45cf37edc72252e | fa:16:3e:fe:8b:58 | {"subnet_id": "7d2d38c8-e091-4c4d-b814-ce036a7082a9", "ip_address": "172.31.17.1"} |
| 7ba36a6f-e6b8-427e-a8b8-2ea1cc6e6697 | HA port tenant e2f2bedbdf794ad0a45cf37edc72252e | | fa:16:3e:df:99:b9 | {"subnet_id": "6e26e835-e602-40eb-9242-e9b17148b8ea", "ip_address": "169.254.192.19"} |
| e3e33741-56e5-4fa0-8b39-d0215eb080c9 | connect_port | e2f2bedbdf794ad0a45cf37edc72252e | fa:16:3e:80:5b:bc | {"subnet_id": "d75231c6-7666-466b-960d-b6d8a9196648", "ip_address": "10.135.130.23"} |
| e713f26a-ebf8-4110-b43e-f940b4a6f6a6 | HA port tenant e2f2bedbdf794ad0a45cf37edc72252e | | fa:16:3e:95:ff:00 | {"subnet_id": "6e26e835-e602-40eb-9242-e9b17148b8ea", "ip_address": "169.254.192.3"} |
| f2042d10-86c1-4b0f-8fb5-6b55efa63ea7 | HA port tenant e2f2bedbdf794ad0a45cf37edc72252e | | fa:16:3e:1e:69:aa | {"subnet_id": "6e26e835-e602-40eb-9242-e9b17148b8ea", "ip_address": "169.254.192.2"} |

[root@SCSP02557 ~]# neutron router-show vpn_connect
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
+-------------------------+---------------------------------------------------------------+
| Field | Value |
+-------------------------+---------------------------------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | nova |
| created_at | 2019-09-22T02:54:38Z |
| description | |
| distributed | True |
| external_gateway_info | |
| flavor_id | |
| ha | True |
| id | f8871714-8987-45e8-a564-ede356c2564a |
| name | vpn_connect |
| project_id | e2f2bedbdf794ad0a45cf37edc72252e |
| revision_number | 8 |
| routes | {"destination": "172.16.1.0/24", "nexthop": "10.135.130.106"} |
| status | ACTIVE |
| tags | |
| tenant_id | e2f2bedbdf794ad0a45cf37edc72252e |
| updated_at | 2019-09-22T02:58:47Z |
+-------------------------+---------------------------------------------------------------+