[ovirt-users] Networking question on setting up self-hosting engine

Dear list, I have tried setting up self-hosting engine on a host with ONE Nic (Ovirt 4.4 CentOS 8 Stream). I followed the Quick Start Guide, and tried the command line self-host setup, but ended up with the following error: {u'msg': u'There was a failure deploying the engine on the local engine VM. The system may not be provisioned according to the playbook results.... I tried on another host with TWO NICs (Ovirt 4.3 Oracle Linux 7 Update 9). This time I setup a bridge BR0 and disable EM1 (the first Ethernet interface on the host), and then created Bond0 on-top of BR0. Both Bond0 and EM2 (the second Ethernet interface on the host) were up. And then I tried again using Ovirt-Cockpit wizard, with the Engine VM set on BR0, and the deployment of Engine VM simply failed. The Engine and Host are using the same network numbers (192.168.2.0/24) and they resolved correctly. I read the logs in var/log/ovirt-engine/engine.log but there wasn't any error reported. I have already tried many times for the past few days and I'm at my wits-end. May I know: 1) Is it possible to install Self-hosted engine with just ONE NIC? 2) Any suggestion how to troubleshoot these problems? And tested network configurations? Hope to hear from you. Thanks.