Xen hypervisor 有两种网络配置模式，正如我在 Virtual Manager 中看到的那样。1 NAT 2 路由。两者都要求 IP 子网。但是，我想配置一个可以分配任何 IP 而不是由 Xen 的 DHCP 分配的网络。
我使用了 oracle Virtual Box，有一个选项可以使用 Host-only 适配器。我想以这种方式使用 Xen。
换句话说，我想将物理网络接口共享给来宾机器（VM）
我在 CentOS 6.2 x86_64 上使用 Xen Hypervisor 3.x
我做了以下工作来解决这个对我有用的问题。
Disabling Xen's network scripts
If using Xen it is recommended to disable its network munging by editing /etc/xen/xend-config.sxp and changing the line
(network-script network-bridge)
To be
(network-script /bin/true)
Disabling NetworkManager
As of the time of writing (Fedora 12), NetworkManager still does not support bridging, so it is necessary to use "classic" network initscripts for the bridge, and to explicitly mark them as independent from NetworkManager (the "NM_CONTROLLED=no" lines in the scripts below).
If desired, you can also completely disable the NetworkManager:
# chkconfig NetworkManager off
# chkconfig network on
# service NetworkManager stop
# service network start
Creating network initscripts
In the /etc/sysconfig/network-scripts directory it is neccessary to create 2 config files. The first (ifcfg-eth0) defines your physical network interface, and says that it will be part of a bridge:
# cat > ifcfg-eth0 <<EOF
DEVICE=eth0
HWADDR=00:16:76:D6:C9:45
ONBOOT=yes
BRIDGE=br0
NM_CONTROLLED=no
EOF
Obviously change the HWADDR to match your actual NIC's address. You may also wish to configure the device's MTU here using e.g. MTU=9000.
The second config file (ifcfg-br0) defines the bridge device:
# cat > ifcfg-br0 <<EOF
DEVICE=br0
TYPE=Bridge
BOOTPROTO=dhcp
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
EOF
WARNING: The line TYPE=Bridge is case-sensitive - it must have uppercase 'B' and lower case 'ridge'
After changing this restart networking (or simply reboot)
# service network restart