抱歉，这个问题听起来很愚蠢，但我今天第一次使用 Xen。我在全新安装的 Debian Lenny 上使用它。我按照这个教程操作http://www.howtoforge.com/virtualization-with-xen-on-debian-lenny-amd64但是686版本，非amd64。
问题是，启用桥接后，似乎无法找到我的路由器 dhcp 服务器。我是不是漏掉了什么？在 ifconfig 上，我有 eth0、peth0 和 lo。
我的意思是物理计算机没有连接。由于没有连接，我甚至无法开始创建 domU。
eth0 Link encap:Ethernet HWaddr 00:13:77:BC:E5:67
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::213:77ff:febc:e567/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8254 errors:0 dropped:0 overruns:0 frame:0
TX packets:5746 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11124971 (10.6 MiB) TX bytes:418646 (408.8 KiB)
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:2370 errors:0 dropped:0 overruns:0 frame:0
TX packets:2370 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6198467 (5.9 MiB) TX bytes:6198467 (5.9 MiB)
peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:8250 errors:0 dropped:0 overruns:0 frame:0
TX packets:5806 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11124056 (10.6 MiB) TX bytes:429582 (419.5 KiB)
Interrupt:253 Base address:0xe000
vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:5746 errors:0 dropped:0 overruns:0 frame:0
TX packets:8255 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:418646 (408.8 KiB) TX bytes:11125224 (10.6 MiB)
vif1.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:11 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:2024 (1.9 KiB) TX bytes:1241 (1.2 KiB)
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
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:8054 (7.8 KiB)
xenbr0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:107 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:15203 (14.8 KiB) TX bytes:0 (0.0 b)
所以显然是有连接的。问题出在桥上。