root@judas:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0E:A6:F9:95:61
          inet addr:10.13.15.50  Bcast:10.13.15.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:677 errors:0 dropped:0 overruns:0 frame:0
          TX packets:522 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:85879 (83.8 KiB)  TX bytes:96248 (93.9 KiB)
          Interrupt:17 Base address:0x6000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

xenbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)


Console during startup:
Setting up networking....
Configuring network interfaces...Internet Systems Consortium DHCP Client V3.0.4 Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:16:3e:00:01:03
Sending on   LPF/eth0/00:16:3e:00:01:03
Sending on   Socket/fallback
DHCPREQUEST on eth0 to 255.255.255.255 port 67 DHCPREQUEST on eth0 to 255.255.255.255 port 67 DHCPREQUEST on eth0 to 255.255.255.255 port 67 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 15 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 No DHCPOFFERS received.

deamon.log:
Apr 15 17:17:44 judas logger: /etc/xen/scripts/block: add XENBUS_PATH=backend/vbd/1/770 Apr 15 17:17:44 judas logger: /etc/xen/scripts/block: add XENBUS_PATH=backend/vbd/1/769 Apr 15 17:17:45 judas logger: /etc/xen/scripts/vif-bridge: online XENBUS_PATH=backend/vif/1/0 Apr 15 17:17:45 judas logger: /etc/xen/scripts/block: Writing backend/vbd/1/769/node /dev/loop0 to xenstore.
Apr 15 17:17:45 judas logger: /etc/xen/scripts/block: Writing backend/vbd/1/769/physical-device 7:0 to xenstore.
Apr 15 17:17:45 judas logger: /etc/xen/scripts/block: Writing backend/vbd/1/769/hotplug-status connected to xenstore.
Apr 15 17:17:45 judas logger: /etc/xen/scripts/vif-bridge: Successful vif-bridge online for vif1.0, bridge xenbr0.
Apr 15 17:17:45 judas logger: /etc/xen/scripts/vif-bridge: Writing backend/vif/1/0/hotplug-status connected to xenstore.
Apr 15 17:17:46 judas logger: /etc/xen/scripts/block: Writing backend/vbd/1/770/node /dev/loop1 to xenstore.
Apr 15 17:17:46 judas logger: /etc/xen/scripts/block: Writing backend/vbd/1/770/physical-device 7:1 to xenstore.
Apr 15 17:17:46 judas logger: /etc/xen/scripts/block: Writing backend/vbd/1/770/hotplug-status connected to xenstore.

messages:
Apr 15 17:16:14 judas dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.reason Apr 15 17:16:14 judas dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.reason Apr 15 17:16:16 judas dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.host_name Apr 15 17:16:16 judas dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.domain_name Apr 15 17:16:16 judas dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.nis_domain Apr 15 17:16:16 judas dhcdbd: message_handler: message handler not found under /com/redhat/dhcp/eth0 for sub-path eth0.dbus.get.nis_servers Apr 15 17:16:17 judas kernel: Bridge firewalling registered Apr 15 17:17:45 judas kernel: device vif1.0 entered promiscuous mode Apr 15 17:17:45 judas kernel: ip_tables: (C) 2000-2006 Netfilter Core Team Apr 15 17:17:49 judas kernel: xenbr0: port 1(vif1.0) entering learning state Apr 15 17:17:49 judas kernel: xenbr0: topology change detected, propagating Apr 15 17:17:49 judas kernel: xenbr0: port 1(vif1.0) entering forwarding state

xend-debug.log:
Xend started at Sun Apr 15 17:16:16 2007.
ifdown: interface eth0 not configured
SIOCSIFNAME: Device or resource busy