VIP primary_controller not accessible - HA deployment

Installation: done on vsphere with MOS 9.2
Architecture:
- 5 networks (PXE, Management, Public, Private, Storage)
- 7 virtual servers
      - 1 Fuel master
      - 3 controllers
      - 2 computes
      - 1 storage

Deployment is successfull.

Problem:

The VIP for accessing Horizon provided on the Fuel Dashboard is not accessible.
The VIP is only accessible from the node which has this resource (vip__public)
root@controller03:~# ip netns exec haproxy ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
20: hapr-ns: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether c6:a0:97:26:2c:99 brd ff:ff:ff:ff:ff:ff
    inet 240.0.0.2/30 scope global hapr-ns
       valid_lft forever preferred_lft forever
    inet6 fe80::c4a0:97ff:fe26:2c99/64 scope link
       valid_lft forever preferred_lft forever
30: b_public: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether b6:bc:db:c4:af:e3 brd ff:ff:ff:ff:ff:ff
    inet <my VIP>/24 scope global b_public
       valid_lft forever preferred_lft forever
    inet6 fe80::b4bc:dbff:fec4:afe3/64 scope link
       valid_lft forever preferred_lft forever