[libvirt-users] guest on host's shutdown/reboot (problem?) - centos 7.5

hi guys I have just two guest after which libvirt looks and when I shutdown those guests: $ virsh shutdown $_dom that domain takes little time to power down, as expected one would say(~20sec) But! I reboot the hosts and I have in my: /etc/sysconfig/libvirt-guests : ON_SHUTDOWN=shutdown PARALLEL_SHUTDOWN=1 SHUTDOWN_TIMEOUT=300 I see libvirtd service shut down takes minutes, a few good minutes to deal with guests shutdown(I suppose?) How could I dig into it and troubleshoot? Would you have any idea as why libvirtd shutdown takes that long? many thank, L.