OST fails in deploy: Failed to connect to the host via ssh

Hi all, Recently we had several cases of OST runs that seemed to have successfully started their VMs, but ansible later failed to connect to them in the "wait_for_connection" done at start of deployment. This happened to both he-basic and basic, e.g. [1][2][3]. Some do pass, e.g. [4]. This looks like e.g. (from [1]): 20:29:58 [36m # Start vms: [32mSuccess [0m (in 0:00:02) [0m ... 20:30:08 he-basic-suite-master/test-scenarios/test_001_he_deploy.py::test_he_deploy started at 2021-07-05 17:30:08 20:30:08 -------------------------------- live log setup -------------------------------- 20:30:09 2021-07-05 17:30:09+0000,180 INFO [ost_utils.pytest.fixtures.deployment] Waiting for SSH on the VMs (deployment:60) 20:30:09 ERROR (122s)Traceback (most recent call last): ... 20:32:15 "msg": "Failed to connect to the host via ssh: ssh: connect to host 192.168.200.3 port 22: No route to host", Any idea? Thanks and best regards, [1] https://jenkins.ovirt.org/job/ovirt-system-tests_he-basic-suite-master/2077/ [2] https://jenkins.ovirt.org/job/ovirt-system-tests_basic-suite-master_night... [3] https://jenkins.ovirt.org/job/ovirt-system-tests_he-basic-suite-master/2076/ [4] https://jenkins.ovirt.org/job/ovirt-system-tests_he-basic-suite-master/2078/ -- Didi