Due to the installation kvm eth0 NIC will be configured as a virtual bridge was normal, then restart the card to get up yet to find the cause
# less ifcfg-br0
DEVICE=br0
HWADDR=FC:15:B4:28:B9:30
#TYPE=Ethernet
UUID=43fc66da-809b-4006-845d-dbeff816fb9f
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=192.168.0.90
NETMASK=255.255.255.0
GATEWAY=192.168.0.254
DNS1 = 114114114114
DNS 2 = 223.5.5.5
# less ifcfg-eth0
DEVICE=eth0
HWADDR=FC:15:B4:28:B9:30
TYPE=Ethernet
#UUID=43fc66da-809b-4006-845d-dbeff816fb9f
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
#IPADDR=192.168.0.90
#NETMASK=255.255.255.0
#GATEWAY=192.168.0.254
BRIDGE=br0
#TYPE=Bridge