060win2000_1.htm
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<P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US">1500</SPAN></FONT></P> </TD> </TR> <TR> <TD> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US">PPPoE(ADSL</SPAN></FONT>用的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US">)</SPAN></FONT></P> </TD> <TD> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US">1492</SPAN></FONT></P> </TD> </TR> <TR> <TD> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US">Dial-up(modem) </SPAN></FONT></P> </TD> <TD> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US">576</SPAN></FONT></P> </TD> </TR> </TABLE> <P>由上面的表格我们可以知道，缺省的网络接口<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> 1500 </SPAN></FONT>，那<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> PPPOE </SPAN></FONT>使用的是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> 1492</SPAN></FONT>，自然而然的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>请求并不相同，所以啦！有一些网页、邮件数据等等的咚咚就无法合理的让你使用啦！</P></UL><UL> <P>那该如何解决呢？<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT>其实只要调整<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> Client </SPAN></FONT>端网络卡的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>值即可完全解决此一问题！而且藉由调整<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>值也可以增进网络效率呢。<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT>那首要课题自然就是知道你的网络卡所可以负荷的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>啦！因此我们第一步就是要找到适合的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>：</P></UL><UL> <LI><BLOCKQUOTE><FONT COLOR="#3333ff">找出<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </FONT></SPAN></FONT><FONT COLOR="#3333ff">值：</FONT><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <BR></SPAN></FONT>在<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> windows </SPAN></FONT>底下要找出<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>值就必须进入<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> DOS </SPAN></FONT>模式，并且知道你的分享的主机的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> IP </SPAN></FONT>才行！例如你的主机是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> windows 2000 </SPAN></FONT>且对内的分享的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> IP </SPAN></FONT>是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> 192.168.1.2</SPAN></FONT>，那幺你可以这么做：<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </BLOCKQUOTE></UL><UL> <LI><BLOCKQUOTE>进入<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MS DOS </SPAN></FONT>模式；<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </BLOCKQUOTE></UL><UL> <LI><BLOCKQUOTE STYLE="margin-bottom: 0cm">打入<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <FONT FACE="細明體"><FONT COLOR="#3333ff">ping -f -l 1500 192.168.1.2</FONT></FONT> </SPAN></FONT> </BLOCKQUOTE> <UL> <BLOCKQUOTE STYLE="margin-bottom: 0cm"> <FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </BLOCKQUOTE> <TABLE COLS=1 WIDTH=80% CELLPADDING=2 CELLSPACING=2 BGCOLOR="#000000"> <TR> <TD> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">C:\WINDOWS>ping -f -l 1500 192.168.1.2</FONT></FONT></FONT> </SPAN></FONT> </P> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Pinging 192.168.1.2 with 1500 bytes of data:</FONT></FONT></FONT> </SPAN></FONT> </P> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Packet needs to be fragmented but DF set.</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Packet needs to be fragmented but DF set.</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Packet needs to be fragmented but DF set.</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Packet needs to be fragmented but DF set.</FONT></FONT></FONT> </SPAN></FONT> </P> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Ping statistics for 192.168.1.2:</FONT></FONT></FONT> <BR><FONT COLOR="#ffffff"> <FONT SIZE=2><FONT FACE="細明體"> Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Approximate round trip times in milli-seconds:</FONT></FONT></FONT> <BR><FONT COLOR="#ffffff"> <FONT SIZE=2><FONT FACE="細明體"> Minimum = 0ms, Maximum = 0ms, Average = 0ms</FONT></FONT></FONT></SPAN></FONT></P> </TD> </TR> </TABLE> <BLOCKQUOTE STYLE="margin-bottom: 0cm">上面的式子中，<FONT FACE="Tahoma, serif"><SPAN LANG="en-US">-l </SPAN></FONT>是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> L </SPAN></FONT>的小写（不是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> 1 </SPAN></FONT>喔），<FONT FACE="Tahoma, serif"><SPAN LANG="en-US">1500 </SPAN></FONT>是我们要测的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>值，结果出现了<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> <FONT COLOR="#000099">Packet needs to be fragmented but DF set</FONT>. </SPAN></FONT>这个东西，那表示<FONT FACE="Tahoma, serif"><SPAN LANG="en-US">MTU</SPAN></FONT>值太大了，你需要更小的<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>值才行！好啦！那假设我们使用<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> 1464 </SPAN></FONT>来测试时：</BLOCKQUOTE> <BLOCKQUOTE STYLE="margin-bottom: 0cm"> <FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> </SPAN></FONT> </BLOCKQUOTE> <TABLE COLS=1 WIDTH=80% CELLPADDING=2 CELLSPACING=2 BGCOLOR="#000000"> <TR> <TD> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">C:\WINDOWS>ping -f -l 1464 192.168.1.2</FONT></FONT></FONT> </SPAN></FONT> </P> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Pinging 192.168.1.2 with 1464 bytes of data:</FONT></FONT></FONT> </SPAN></FONT> </P> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Reply from 192.168.1.2: bytes=1464 time=10ms TTL=128</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Reply from 192.168.1.2: bytes=1464 time<10ms TTL=128</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Reply from 192.168.1.2: bytes=1464 time<10ms TTL=128</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Reply from 192.168.1.2: bytes=1464 time<10ms TTL=128</FONT></FONT></FONT> </SPAN></FONT> </P> <P><FONT FACE="Tahoma, serif"><SPAN LANG="en-US"><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Ping statistics for 192.168.1.2:</FONT></FONT></FONT> <BR><FONT COLOR="#ffffff"> <FONT SIZE=2><FONT FACE="細明體"> Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),</FONT></FONT></FONT> <BR><FONT SIZE=2><FONT FACE="細明體"><FONT COLOR="#ffffff">Approximate round trip times in milli-seconds:</FONT></FONT></FONT> <BR><FONT COLOR="#ffffff"> <FONT SIZE=2><FONT FACE="細明體"> Minimum = 0ms, Maximum = 10ms, Average = 2ms</FONT></FONT></FONT></SPAN></FONT></P> </TD> </TR> </TABLE> <BLOCKQUOTE>结果出现了响应了！这表示这一个<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>值是可行的！<FONT COLOR="#3333ff">不过，强烈建议找出可行的最大<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </FONT></SPAN></FONT><FONT COLOR="#3333ff">值！这样一来，在设定的时候，才可以达到最佳的网络速率</FONT>！</BLOCKQUOTE> </UL></UL><UL> <LI><BLOCKQUOTE><FONT COLOR="#3333ff">找出<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </FONT></SPAN></FONT><FONT COLOR="#3333ff">值</FONT>：利用上面这个方法找到的数值还不是<FONT FACE="Tahoma, serif"><SPAN LANG="en-US"> MTU </SPAN></FONT>喔！由于一些封包上面的问题，上面这个值再加上<FONT FACE="Tahoma, serif"><SPAN LANG="en-US">⌨️ 快捷键说明
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