装xen后“xenbr1: Dropping NETIF_F_UFO..“报错？

爱问的蜗牛

我装的服务器是 DELL R410，安装的系统是redhat-5.4 64位系统

uname -a 看到的内核版本是： 2.6.18-128.el5xen

装xen包是 xen.x86_64 0:3.0.3-80.el5

装完后ifconfig 看到的是 eth0，eth1，lo，peth1，vif1.0，virbr0,xenbr1

重启服务器，屏显报错：

   “xenbr1: Dropping NETIF_F_UFO since no NETIF_F_HW_CSUM feature.”
   “virbr0: Dropping NETIF_F_UFO since no NETIF_F_HW_CSUM feature.”

之后无法调试成xenbr0和xenbr1双虚拟网桥的情况，是否和这个报错有关？

我在Google上查原因是

"This means that for some reason the UFO flag has been enabled
on the bridge device without also enabling TX checksum offload.
This is an illegal configuration which is why the kernel warns
about it.  As to why the UFO flag is set at all more investigation
is needed on the actual machine.

但对于这个NETIF_F_UFO的报错及调不出双虚拟网桥，没搞明白根本原因

请高手指教~~谢谢！