你参考以下文章将你的MTU设置成512试试看:
http://www.cisco.com/warp/public/105/38.shtml
These parameters for TCP/IP are specific to individual network adapter cards. These appear under this Registry path, where "adapter ID" refers to the Services subkey for the specific adapter card:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\
Interfaces\[adapter id]
MTU: Set it to equal the required MTU size in decimal (default 1500)
Data Type: DWORD
http://www.cisco.com/warp/public/105/38.shtml