[Users] Host discovery failing due to host network being lost

Hi ovirt users, I was trying to check on IRC the below, did not get any replies, so sending this mail. Can someone help me understand what could be the issue that causing my managed host to lose network settings, when i try to discover it from ovirt-engine ? I have to then manually (using a remote console) re-setup the network.. it even overrites my ifcfg-eth0 file I see a new bridge getting added called ovirtmgmt and route entry corr. to that.. the ifcfg-eth0 also has that entry I feel that ovirt scripts running on the host should atleast take a backup of the ifcfg* files they modify so that in case of issues like these, user can login via remote console and restore the original ifcfg file. This is what i asked on IRC... responses appreciated... deepakcs> Hello, i just configured ovirt-engine and discovering my first managed host.. got some Qs <deepakcs> what diff does it make when i select "override ip tables" check box during new Host workflow ? * djasa has quit (Ping timeout: 480 seconds) <deepakcs> this is the second time i am discovering this host and everytime the host discovery hangs during "Installing" and if i check the host, it goes out of network.... has anybody faced this problem before ? <deepakcs> While discovering the host, the host network ipv4 address is gone ! and thus the host goes out of network Some more updates.. 1) I manually re-setup the host network, made it pingable, esp from the ovirt-engine node, and clicked on Re-install on the web gui, this time with the 'override ip tables' check enabled 2) this time it successfully completed the node bootstrap steps (as seen from the Events window) and status was Reboot 3) But after reboot the same thing happened.. the host lost ipv4 addr, route entries are completely gone and onthe web gui the host is seen as non-responsive, which is expected bcos the host is not on the network anymore... what is the reason the above is happening ?