📄 wanconf.htm
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<tr>
<td><strong>功 能</strong></td>
<td><strong>命 令</strong></td>
</tr>
<tr>
<td>显示帧中继DLCI和LMI信息</td>
<td><strong>show interface serial </strong><em>number</em></td>
</tr>
<tr>
<td>显示LMI状态</td>
<td><strong>show frame-relay lmi </strong><em>[type
number]</em></td>
</tr>
<tr>
<td>显示PVC状态</td>
<td><strong>show frame-relay pvc </strong>[<em>type
number </em>[<em>dlci</em>]]</td>
</tr>
<tr>
<td>显示配置静态路由</td>
<td><strong>show frame-relay route</strong></td>
</tr>
<tr>
<td>显示帧中继传输状态</td>
<td><strong>show frame-relay traffic</strong></td>
</tr>
</table>
<p> </p>
<hr>
<p><a name="m13"></a><font color="#008080" size="4"><em><strong>配置DDN</strong></em></font></p>
<p>DDN(Digital Data Network)是一种点对点的同步数据通信链路.它支持PPP,SLIP,HDLC和SDLC等链路层通信协议.允许IP,
Novell IPX, Bridging,CLNS,AppleTalk,DECnet等多种上层协议在上面运行.</p>
<ul>
<li><a href="#m1"><font color="#008080">基本配置</font></a></li>
</ul>
<ul>
<li><a href="#m2"><font color="#008080">压缩技术</font></a></li>
</ul>
<ul>
<li><a href="#m3"><font color="#008080">E1端口配置</font></a></li>
</ul>
<p><a name="m1"></a><font color="#808080" size="3"><em><strong>基本配置</strong></em></font></p>
<table border="2" bordercolordark="#808080"
bordercolorlight="#808080">
<tr>
<td><strong>功 能</strong></td>
<td><strong>命 令</strong></td>
</tr>
<tr>
<td>进入指定端口</td>
<td><strong>interface serial </strong><em>number</em></td>
</tr>
<tr>
<td>定义该端口IP地址</td>
<td><strong>ip address </strong><em>ip-address mask</em></td>
</tr>
<tr>
<td>指定该端口打包方式</td>
<td><strong>encapsulation </strong>{<strong>PPP</strong>|
<strong>HDLC </strong>}</td>
</tr>
</table>
<p><a name="m2"></a><font color="#808080" size="3"><em><strong>压缩技术</strong></em></font></p>
<p>通常在串口中传输的数据是不压缩的,它允许数据包头在每次传输时正常交换,但每次将浪费带宽.目前支持的压缩有PPP,Frame
Relay, X.25, TCP等等.</p>
<p>Cisco的压缩是通过软件完成的,将影响系统性能.故建议路由器CPU占用超过65%,就不要使用压缩.(<strong>show
process cpu </strong>EXEC命令查看当前CPU使用情况)</p>
<table border="2" bordercolordark="#808080"
bordercolorlight="#808080">
<tr>
<td><strong>功 能</strong></td>
<td><strong>命 令</strong></td>
</tr>
<tr>
<td>TCP传输头压缩</td>
<td><strong>ip tcp head-compression </strong>[<strong>passive</strong>]</td>
</tr>
<tr>
<td>X.25压缩</td>
<td><strong>X25 compress</strong></td>
</tr>
<tr>
<td>PPP压缩</td>
<td><strong>ppp compress </strong>[<strong>predictir</strong>|<strong>stac</strong>]</td>
</tr>
</table>
<p><font color="#000000"><strong>注:</strong><em>
"passive"表示只有输入包是压缩时,输出包才压缩.
</em></font></p>
<p><a name="m3"></a><font color="#808080" size="3"><em><strong>E1端口配置</strong></em></font></p>
<p>在Cisco 4500,4700,7000和7500系列里面均支持E1(2.048Mbps)数率的接口.每一个E1端口可以按时隙分成30路64K数据线路和2路信号线路.这30个64K数据线路每一路均可以当作一条64K的专线.</p>
<table border="2" bordercolordark="#808080"
bordercolorlight="#808080">
<tr>
<td><strong>功 能</strong></td>
<td><strong>命 令</strong></td>
</tr>
<tr>
<td>在配置模式下,定义Controller E1</td>
<td><strong>controller e1 </strong><em>slot/port</em></td>
</tr>
<tr>
<td>定义line code</td>
<td><strong>linecode </strong>{<strong>ami </strong>|<strong>hdb3</strong>}</td>
</tr>
<tr>
<td>定义字符帧</td>
<td><strong>framing </strong>{<strong>crc4 </strong>|<strong>no-crc4</strong>}</td>
</tr>
<tr>
<td>定义E1组</td>
<td><font size="3"><strong>channel-group </strong><em>number
</em><strong>timeslots </strong><em>range </em>[<strong>speed
</strong>{<strong>48</strong>|<strong> 56</strong>|<strong>
64</strong>}]</font></td>
</tr>
<tr>
<td>指定串口属于那一个channel-group组</td>
<td><strong>interface serial </strong><em>slot/port:channel-group</em></td>
</tr>
</table>
<p>注:</p>
<p><em>slot/port----是针对7000或7500系列的,故区分槽口号和端口号.</em></p>
<p><em>linecode----默认是HDB3.</em></p>
<p><em>framing----默认是crc4,要与电信局参数匹配.</em></p>
<p><em>channel-group----每个E1可以分成30个channel-group,把channel-group和时间槽对应起来.channel-group是0-30,timeslots是1-31.</em></p>
<p><em>interface serial----在定义完E1 channel-group后,我们把group赋予成一个虚拟串口.</em></p>
<p>具体的请参阅"<a href="#m21"><font color="#00FF00">Channelized
E1 Interface Example</font></a>"实例.</p>
<p> </p>
<hr>
<p><a name="m15"></a><font color="#008080" size="4"><em><strong>配置X.25</strong></em></font></p>
<p>X.25配置完成如下工作:</p>
<table border="2" bordercolordark="#808080"
bordercolorlight="#808080">
<tr>
<td><strong>功 能</strong></td>
<td><strong>命 令</strong></td>
</tr>
<tr>
<td>设置X.25模式</td>
<td><font face="Times New Roman"><strong>encapsulation
x25 </strong>[<strong>dte</strong>|<strong>dce</strong>]</font></td>
</tr>
<tr>
<td>设置最大虚电路数</td>
<td><strong>x25 htc </strong><em>max-vc-number</em></td>
</tr>
<tr>
<td>设置X.121地址</td>
<td><strong>x25 address </strong><em>x121-address</em></td>
</tr>
<tr>
<td>建立IP地址与X.121地址对应</td>
<td><strong>x25 map ip </strong><em>ip-address
x121-addres </em>[<strong>broadcast</strong>]</td>
</tr>
</table>
<p><strong>htc</strong>----htc是最大的虚电路数,因为许多X.25交换机是从高到低建立虚电路的,<em>max-vc-number</em>不能超过申请的最大值.</p>
<p>请参阅"<a href="#m22"><font color="#00FF00">X.25
Example</font></a>"的配置实例.</p>
<p> </p>
<hr>
<p><a name="m16"></a><font color="#008080" size="4"><em><strong>广域网配置实例</strong></em></font></p>
<ul>
<li><a href="#m17"><font color="#008080">DDR Example</font></a></li>
</ul>
<ul>
<li><a href="#m18"><font color="#008080">Dial Backup Example</font></a></li>
</ul>
<ul>
<li><a href="#m19"><font color="#008080">Configure
subinterface Example</font></a></li>
</ul>
<ul>
<li><a href="#m20"><font color="#008080">Frame Relay
Switching Example</font></a></li>
</ul>
<ul>
<li><a href="#m21"><font color="#008080">Channelized E1
Interface Example</font></a></li>
</ul>
<ul>
<li><a href="#m22"><font color="#008080">X.25 Example</font></a></li>
</ul>
<p><a name="m17"></a><strong>DDR Example</strong></p>
<p><img src="mm/tt3910.GIF" width="519" height="199"></p>
<p>Configuration for RouterA:</p>
<p>ip route 131.108.29.0 131.108.126.2<br>
ip route 131.108.1.0 131.108.126.2<br>
dialer-list 1 protocol ip permit<br>
dialer-list 1 protocol ipx deny<br>
!<br>
interface serial 0<br>
ip address 131.108.126.1 255.255.255.0<br>
dialer in-band<br>
dialer-group 1<br>
!<br>
dialer map ip 131.108.126.2 5551234<br>
!<br>
dialer idle-timeout 300</p>
<p><a name="m18"></a><strong>Dial Backup Example</strong></p>
<p>A)同步V.25 bits方式</p>
<p>Configuration for RouterA:</p>
<p>interface Serial0:0<br>
backup delay 0 10<br>
backup interface Serial10<br>
ip address 16.217.30.2 255.255.255.252<br>
!<br>
interface Serial10<br>
ip address 16.30.16.81 255.255.255.0<br>
encapsulation ppp<br>
dialer in-band<br>
dialer string 8292<br>
dialer-group 1<br>
pulse-time 1<br>
!<br>
dialer-list 1 protocol ip permit</p>
<p>B)辅助口作拨号备份</p>
<p>Configuration for RouterA:</p>
<p>chat-script MYDIAL "" "atdt 8292" TIMEOUT
60 "CONNECT"<br>
!<br>
interface Serial0<br>
backup delay 0 0<br>
backup interface Async1<br>
ip address 16.3.1.1 255.255.255.0<br>
encapsulation ppp<br>
!<br>
interface Async1<br>
ip address 16.3.2.1 255.255.255.0<br>
encapsulation ppp<br>
keepalive 9<br>
async default routing<br>
async dynamic address<br>
async dynamic routing<br>
async mode dedicated<br>
dialer in-band<br>
dialer string 8292<br>
dialer-group 1<br>
!<br>
dialer-list 1 protocol ip permit<br>
!<br>
line aux 0<br>
script dialer MYDIAL<br>
modem InOut<br>
transport output none<br>
stopbits 1<br>
flowcontrol hardware<br>
speed 9600</p>
<p><a name="m19"></a><strong>Subinterface Example(Frame Relay)</strong></p>
<p><img src="mm/tt3911.GIF" width="399" height="183"></p>
<p>Configuration for RouterA:</p>
<p>interface serial 0<br>
encapsulation frame-relay<br>
interface s 0.1 multipoint<br>
ip address 11.10.11.1 255.255.255.0<br>
frame-relay interface-dlci 41<br>
frame-relay interface-dlci 42</p>
<p>Configuration for RouterC:</p>
<p>interface serial 0<br>
encapsulation frame-relay<br>
interface s 0.1 point-to-point<br>
ip address 11.10.16.2 255.255.255.0<br>
frame-relay interface-dlci 46</p>
<p>Configuration for RouterB:</p>
<p>interface serial 0<br>
encapsulation frame-relay<br>
interface s 0.1 multipoint<br>
ip address 11.10.11.3 255.255.255.0<br>
frame-relay interface-dlci 43<br>
frame-relay interface-dlci 44<br>
!<br>
interface s 0.2 point-to-point<br>
ip address 11.10.13.1 255.255.255.0<br>
frame-relay interface-dlci 48</p>
<p><a name="m20"></a><strong>Frame Relay Switching Example</strong></p>
<p><img src="mm/tt3912.GIF" width="527" height="119"></p>
<p>Configuration for RouterA:</p>
<p>frame-relay switching<br>
!<br>
int s 0<br>
no ip address<br>
frame-relay encapsulation<br>
frame-relay route 167 tun0 43<br>
frame-relay intf-type dce<br>
!<br>
int s 1<br>
ip address 131.108.100.1 255.255.255.0<br>
!<br>
int tu 0<br>
tunnel source serial 1<br>
tunnel destination 131.108.13.2</p>
<p>Configuration for RouterB:</p>
<p>frame-relay switching<br>
!<br>
int s 0<br>
no ip address<br>
frame-relay encapsulation<br>
frame-relay route 9 tun0 43<br>
frame-relay intf-type dce<br>
!<br>
int s 1<br>
ip address 131.108.13.2 255.255.255.0<br>
!<br>
int tu 0<br>
tunnel source serial 1<br>
tunnel destination 131.108.100.1</p>
<p><a name="m21"></a><strong>Channelized E1 Interface Example</strong></p>
<p>假设是7500系列路由器,E1接口(MIP板)在插槽4上面.</p>
<p>一个channel-group可对应多个时间槽,本例中serial4/0:1有5*64Kbps的数率.</p>
<p>Configuration for Router:</p>
<p>controller E1 0<br>
framing NO-CRC4 <br>
channel-group 0 timeslots 1<br>
channel-group 1 timeslots 2,7-9,20 speed 64<br>
!<br>
interface Serial4/0:0<br>
ip address 16.217.30.2 255.255.255.252<br>
encapsulation ppp<br>
!<br>
interface Serial4/0:1<br>
ip address 16.205.30.5 255.255.255.252</p>
<p><a name="m22"></a><strong>X.25 Example</strong></p>
<p>在配置X.25时,为减少路由交换引起的呼叫,通常用静态路由.而当一对多情况下,不在一个子网中用subinterface配置.</p>
<p>Configuration for Router:</p>
<p>interface serial 0<br>
ip address 131.108.100.1 255.255.255.0<br>
encapsulation x25<br>
x25 address 041673226839<br>
x25 htc 16<br>
x25 map ip 131.108.100.2 041675222222<br>
int s 0.1<br>
ip address 131.108.101.1 255.255.255.0<br>
x25 map ip 131.108.101.2 041674222222<br>
!<br>
ip route 131.108.100.0 255.255.255.0 131.108.100.2<br>
ip route 131.108.101.0 255.255.255.0 131.108.101.2</p>
<hr>
<p><img src="zijin%20copywrite.GIF" width="600" height="48"></p>
</body>
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