[Users] ovirt 3.2 host network interfaces

Hi all! Today I installed the new oVirt 3.2 on CentOS 6.3 using www.dreyou.org repository and I liked so much. But, I'm having problems setting networks into physical interfaces of the hosts. On my production environment oVirt 3.1, I have several networks in my eth1 interface, but in the new one, I can't do the same. When I add a network to eth1, no other can be added to. The webadmin says me: No valid operation for network2 and eth1. How can I add several networks to the same eth? Thanks.