Hi, Steps to Reproduce: 1. Add /usr/share/openstack-tripleo-heat-templates/environments/backup-and-restore/rear.yaml as a environment file in openstack overcloud deploy command 2. Run the deployement, in step 0 or 1 the error should come up. Actual results: 2022-06-16 14:52:07.581055 | 48d539a1-1679-6c30-81d1-000000007f7d | TASK | Check backup server IP 2022-06-16 14:52:18.186942 | 48d539a1-1679-6c30-81d1-000000007f7d | FATAL | Check backup server IP | overcloud-controller-1 | error={"changed": true, "cmd": ["ping", "-c", "1", "192.168.24.1"], "delta": "0:00:10.011643", "end": "2022-06-16 06:52:18.119615", "msg": "non-zero return code", "rc": 1, "start": "2022-06-16 06:52:08.107972", "stderr": "", "stderr_lines": [], "stdout": "PING 192.168.24.1 (192.168.24.1) 56(84) bytes of data.\n\n--- 192.168.24.1 ping statistics ---\n1 packets transmitted, 0 received, 100% packet loss, time 0ms", "stdout_lines": ["PING 192.168.24.1 (192.168.24.1) 56(84) bytes of data.", "", "--- 192.168.24.1 ping statistics ---", "1 packets transmitted, 0 received, 100% packet loss, time 0ms"]} Expected results: ReaR in tripleo should be deployed without errors Additional info: There is no 192.168.24.0 subnet in my setup Should i make a host entry in all the overcloud nodes and undercloud node like below? 192.268.24.1 undercloud 192.268.24.1 overcloud-controller-1 With Regards, Swogat pradhan