在xen4.1之前,通过设置/etc/xen/xend-config.sxp中的(network-script network-bridge)可以让xend来自动设置网桥。但是xen4.1之后不建议这么做:
When using the xl
toolstack the host networking configuration is not configured by the toolstack but rather administrators are required to setup an appropriate network configuration using the tools provided by their host distribution.