host$ ifconfig
br0       Link encap:Ethernet  HWaddr 00:1e:68:8e:73:ec
          inet addr:67.180.246.122  Bcast:67.180.246.127  Mask:255.255.255.248
          inet6 addr: fe80::21e:68ff:fe8e:73ec/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:646817 errors:0 dropped:0 overruns:0 frame:0
          TX packets:195394 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:169318276 (169.3 MB)  TX bytes:1488748941 (1.4 GB)

eth0      Link encap:Ethernet  HWaddr 00:1e:68:8e:73:ec
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:659469 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1133418 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:182084041 (182.0 MB)  TX bytes:1570766254 (1.5 GB)
          Interrupt:18 Memory:dffe0000-e0000000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:29313 errors:0 dropped:0 overruns:0 frame:0
          TX packets:29313 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:76697026 (76.6 MB)  TX bytes:76697026 (76.6 MB)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:75 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7126 (7.1 KB)  TX bytes:6319 (6.3 KB)

host$ brctl show
bridge name	bridge id		STP enabled	interfaces
br0		8000.001e688e73ec	no		eth0
virbr0		8000.000000000000	yes
host$