设置如下： Router1:
interface Serial0
ip address 192.200.10.1 255.255.255.0 clockrate 1000000 Router2:
interface Serial0
ip address 192.200.10.2 255.255.255.0 !
C. 举例使用E1线路实现多个64K专线连接. 相关命令: 任务 命令 controller {t1 | e1} number 进入controller配置模式 framing {crc4 | no-crc4} 选择帧类型 linecode {ami | b8zs | hdb3} 选择line-code类型 channel-group number timeslots range1 建立逻辑通道组与时隙的映射 show controllers e1 [slot/port]2 显示controllers接口状态 注: 1. 当链路为T1时,channel-group编号为0-23, Timeslot范围1-24; 当链路为E1时, channel-group编号为0-30, Timeslot范围1-31.
2.使用show controllers e1观察controller状态,以下为帧类型为crc4时controllers正常的状态. Router# show controllers e1 e1 0/0 is up.
Applique type is Channelized E1 - unbalanced
Framing is CRC4, Line Code is HDB3 No alarms detected. Data in current interval (725 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours) 0 Line Code Violations, 0 Path Code Violations, 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
以下例子为E1连接3条64K专线, 帧类型为NO-CRC4,非平衡链路,路由器具体设置如下:
shanxi#wri t
Building configuration... Current configuration: !
version 11.2
no service udp-small-servers no service tcp-small-servers !
hostname shanxi !
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enable secret 5 $1$XN08$Ttr8nfLoP9.2RgZhcBzkk/ enable password shanxi ! !
ip subnet-zero !
controller E1 0 framing NO-CRC4
channel-group 0 timeslots 1 channel-group 1 timeslots 2 channel-group 2 timeslots 3 !
interface Ethernet0
ip address 133.118.40.1 255.255.0.0 media-type 10BaseT !
interface Ethernet1 no ip address shutdown !
interface Serial0:0
ip address 202.119.96.1 255.255.255.252 no ip mroute-cache !
interface Serial0:1
ip address 202.119.96.5 255.255.255.252 no ip mroute-cache !
interface Serial0:2
ip address 202.119.96.9 255.255.255.252 no ip mroute-cache !
no ip classless
ip route 133.210.40.0 255.255.255.0 Serial0:0 ip route 133.210.41.0 255.255.255.0 Serial0:1 ip route 133.210.42.0 255.255.255.0 Serial0:2 !
line con 0 line aux 0 line vty 0 4
password shanxi login ! end
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6、配置PPP:
PPP(Point-to-Point Protocol)是SLIP(Serial Line IP protocol)的继承者，它提供了跨过同步和异步电路实现路由器到路由器(router-to-router)和主机到网络(host-to-network)的连接。
CHAP(Challenge Handshake Authentication Protocol)和PAP(Password Authentication Protocol) (PAP)通常被用于在PPP封装的串行线路上提供安全性认证。使用CHAP和PAP认证,每个路由器通过名字来识别，可以防止未经授权的访问。
CHAP和PAP在RFC 1334上有详细的说明。
A. 有关命令 端口设置 任务 命令 encapsulation ppp1 设置PPP封装 ppp authentication {chap | chap pap | pap chap | 设置认证方法 pap} [if-needed] [list-name | default] [callin] username name password secret 指定口令 clockrate speed 设置DCE端线路速度 注：1、要使用CHAP/PAP必须使用PPP封装。在与非Cisco路由器连接时，一般采用PPP封装，其它厂家路由器一般不支持Cisco的HDLC封装协议。 2. 举例
路由器Router1和Router2的S0口均封装PPP协议，采用CHAP做认证，在Router1中应建立一个用户，以对端路由器主机名作为用户名，即用户名应为router2。同时在Router2中应建立一个用户，以对端路由器主机名作为用户名，即用户名应为router1。所建的这两用户的password必须相同。
设置如下： Router1:
hostname router1
username router2 password xxx interface Serial0
ip address 192.200.10.1 255.255.255.0 clockrate 1000000
ppp authentication chap !
Router2:
hostname router2
username router1 password xxx interface Serial0
ip address 192.200.10.2 255.255.255.0 ppp authentication chap
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7、广域网配置实例
DDR Example
Dial Backup Example
Configure subinterface Example Frame Relay Switching Example Channelized E1 Interface Example X.25 Example DDR Example
例：
Configuration for RouterA:
ip route 131.108.29.0 131.108.126.2 ip route 131.108.1.0 131.108.126.2 dialer-list 1 protocol ip permit dialer-list 1 protocol ipx deny !
interface serial 0
ip address 131.108.126.1 255.255.255.0 dialer in-band dialer-group 1 !
dialer map ip 131.108.126.2 5551234 !
dialer idle-timeout 300
Dial Backup Example
A)同步V.25 bits方式
Configuration for RouterA:
interface Serial0:0 backup delay 0 10
backup interface Serial10
ip address 16.217.30.2 255.255.255.252 !
interface Serial10
ip address 16.30.16.81 255.255.255.0 encapsulation ppp dialer in-band
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dialer string 8292 dialer-group 1 pulse-time 1 !
dialer-list 1 protocol ip permit
B)辅助口作拨号备份
Configuration for RouterA:
chat-script MYDIAL \!
interface Serial0 backup delay 0 0
backup interface Async1
ip address 16.3.1.1 255.255.255.0
encapsulation ppp !
interface Async1
ip address 16.3.2.1 255.255.255.0 encapsulation ppp keepalive 9
async default routing async dynamic address async dynamic routing async mode dedicated dialer in-band dialer string 8292 dialer-group 1 !
dialer-list 1 protocol ip permit !
line aux 0
script dialer MYDIAL modem InOut
transport output none stopbits 1
flowcontrol hardware speed 9600
Subinterface Example(Frame Relay)
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路由器的基本配置
