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