vlan10.htm

V-LAN 虚拟局域网的学习笔记

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</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>转发端口号（交换机）</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal align=left style='margin-left:21.0pt;text-align:left;
text-indent:-21.0pt;mso-pagination:widow-orphan;mso-list:l3 level1 lfo10;
tab-stops:list 21.0pt'><![if !supportLists]><span lang=EN-US style='mso-bidi-font-size:
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</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>转发目标</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>MAC</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>地址</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>等等。</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";color:blue'>同一个流的第二块以后的数据到达交换机后，直接通过查询先前保存在缓存中的信息查出“转发端口号”后就可以转发<span
class=GramE>给目标</span>所连端口了</span><span style='mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>。</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>这样一来，就不需要再一次次经由内部路由模块中继，而仅凭交换机内部的缓存信息就足以判断应该转发的端口。</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>这时，交换机会对数据帧进行由路由器中继时相似的处理，例如改写</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>MAC</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>地址、</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>IP</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>包头中的</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>TTL</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>和</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>Check
Sum</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>校验<span class=GramE>码信息</span>等，</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

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style='mso-spacerun:yes'>&nbsp;</span>SHAPE<span
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     lang=EN-US style='font-family:宋体'>②</span><span lang=EN-US><o:p></o:p></span></p>
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     style='mso-bidi-font-weight:normal'><span style='font-family:宋体;
     mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>客户端</span><span
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     lang=EN-US style='font-size:7.5pt'>IP:192.168.1.1/24<o:p></o:p></span></p>
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