Something looks fishy with the ipv6 binding. ipv6 networking must be bond using the statement NETWORKING_IP6=yes and the host name must be entered. For more information I found the tutorial at https://wikis.uit.tufts.edu/confluence/display/TUSKpub/Configure+Pair+Bonding,+VLANs,+and+Bridges+for+KVM+Hypervisor