I have following environment:
___________________________________________________________________________
| VM Name                    | Hostname |  IP MGMT         | IP OAM     |                 Type                    | 
| ----------                        | -----------------| ------------------ | -------------- | -------------------------------------| 
| cc-duplex-controller-0  | controller-0  | 192.168.20.3 | 10.10.20.3 | AIO Duplex - Central Cloud | 
| cc-duplex-controller-1  | controller-1 | 192.168.20.4  | 10.10.20.4 | AIO Duplex - Central Cloud |
-------------------------------------------------------------------------------------------------------------------------------
| sc-duplex-controller-0  | localhost  |              -            | 10.10.30.3 | AIO Duplex - Sub Cloud |
| sc-duplex-controller-1  | -               |              -            | 10.10.20.4 | AIO Duplex - Sub Cloud |
| sc-duplex-controller-2  | -               |              -            | 10.10.20.5 | AIO Duplex - Sub Cloud |

My subcloud YAML file:

system_mode: duplex
name: "Region-Sub1"
description: "Sub1Site"
location: "SUB1"
timezone: Asia/Jakarta

management_subnet: 192.168.30.0/24
management_start_address: 192.168.30.2
management_end_address: 192.168.30.50
management_gateway_address: 192.168.30.1

external_oam_subnet: 10.10.30.0/24
external_oam_gateway_address: 10.10.30.1
external_oam_floating_address: 10.10.30.2

systemcontroller_gateway_address: 192.168.20.1

Every time I try to add subcloud using command:
`dcmanager subcloud add --bootstrap-address 10.10.30.3 --bootstrap-values subcloud-1.yml`
 It always end up failed like below:

[sysadmin@controller-0 ~(keystone_admin)]$ dcmanager subcloud list
+----+------------+------------+--------------+--------------------+---------+
| id | name       | management | availability | deploy status       | sync    |
+----+------------+------------+--------------+--------------------+---------+
|  6 | Region-BGR | unmanaged  | offline      | deploy-prep-failed | unknown |
+----+------------+------------+--------------+--------------------+---------+

There is no log subcloud log reproduced or maybe any workaround I could try?