[Users] How can I change IP of the ovirt node?

Hello all, is it possible to change IP address of the oVirt node? When I log into oVirt web interface, click on "my_datacenter"->clusters->"my_cluster"->hosts and then I click on the host and then I try to change it's IP, it's not possible because it is greyed-out. Node is of course in the maintenance mode. I'm using ovirt-*3.1.0-2.fc17 on fully updated F17 machine. Thank you in advance for response. Regards, Adam