Comment 4 for bug 199533

$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1a:92:97:26:50
          inet addr:128.153.146.84 Bcast:128.153.146.255 Mask:255.255.255.0
          inet6 addr: fe80::21a:92ff:fe97:2650/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2097 (2.0 KB) TX bytes:4285 (4.1 KB)

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:16436 Metric:1
          RX packets:10632 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10632 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:16735008 (15.9 MB) TX bytes:16735008 (15.9 MB)

peth0 Link encap:Ethernet HWaddr 00:1a:92:97:26:50
          inet6 addr: fe80::21a:92ff:fe97:2650/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
          RX packets:12097 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6943 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:9216290 (8.7 MB) TX bytes:1626696 (1.5 MB)
          Interrupt:23 Base address:0x8000

$ brctl show
bridge name bridge id STP enabled interfaces
eth0 8000.001a92972650 no peth0

Also, brctl show doesn't change during the xm create attempt. So, it doesn't look like the vif is being added to the bridge at all.