Hi, In RHEL5/6 we have been able to create bridges on our hyper-visor of a number of vlans (eg. em1 -> em1.483 -> br483) We would be able to see this br483 in the virt-manager drop down network choice at the end of creating a new host. On RHEL7 we are not using NetworkManager per the documentation[0] for bridges (and because it is not worth it). So a RHEL7 virt-manager (0.10.0) when connected to a libvirtd for RHEL6 (0.10.2) shows the bridge but when connected to a libvirtd for RHEL7 (1.1.1) it does not. So it isn't a virt-manager problem as it seems to be a difference in the backend libvirtd. You are able to manually specify the bridge device and it does work though. The `iface-dumpxml br483` command in virsh on RHEL6 and RHEL7 both are identical. I guess the question how does a libvirt client like virt-manager determine a iface is a usable bridge? [0] - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/... Thanks, derek -- Derek T. Yarnell University of Maryland Institute for Advanced Computer Studies