CISCO配置命令大全 (3)

6 、配置PPP:
  PPP(Point-to-Point Protocol) 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) 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 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 PAP RFC 1334 上有详细的说明。
  
  A. 有关命令
  端口设置
  任务 命令
  设置PPP 封装 encapsulation ppp1
  设置认证方法 ppp authentication {chap | chap pap | pap chap | pap} [if-needed] [list-name | default] [callin]
  指定口令 username name password secret
  设置DCE 端线路速度 clockrate speed
  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 HDLC 封装协议。
  2. 举例
  路由器Router1 Router2 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 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
  
  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
  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 "" "atdt 8292" TIMEOUT 60 "CONNECT"
  !
  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)
   
   
  Configuration for RouterA:
   
  interface serial 0
  encapsulation frame-relay
  interface s 0.1 multipoint
  ip address 11.10.11.1 255.255.255.0
  frame-relay interface-dlci 41
  frame-relay interface-dlci 42
   
  Configuration for RouterC:
   
  interface serial 0
  encapsulation frame-relay
  interface s 0.1 point-to-point
  ip address 11.10.16.2 255.255.255.0
  frame-relay interface-dlci 46
   
  Configuration for RouterB:
   
  interface serial 0
  encapsulation frame-relay
  interface s 0.1 multipoint
  ip address 11.10.11.3 255.255.255.0
  frame-relay interface-dlci 43
  frame-relay interface-dlci 44
  !
  interface s 0.2 point-to-point
  ip address 11.10.13.1 255.255.255.0
  frame-relay interface-dlci 48
   
  Frame Relay Switching Example
   
   
  Configuration for RouterA:
   
  frame-relay switching
  !
  int s 0
  no ip address
  frame-relay encapsulation
  frame-relay route 167 tun0 43
  frame-relay intf-type dce
  !
  int s 1
  ip address 131.108.100.1 255.255.255.0
  !
  int tu 0
  tunnel source serial 1
  tunnel destination 131.108.13.2
   
  Configuration for RouterB:
   
  frame-relay switching
  !
  int s 0
  no ip address
  frame-relay encapsulation
  frame-relay route 9 tun0 43
  frame-relay intf-type dce
  !
  int s 1
  ip address 131.108.13.2 255.255.255.0
  !
  int tu 0
  tunnel source serial 1
  tunnel destination 131.108.100.1
   
  Channelized E1 Interface Example
   
  假设是7500 系列路由器,E1 接口(MIP ) 在插槽4 上面. 一个channel-group 可对应多个时间槽, 本例中serial4/0:1 5*64Kbps 的数率.  
  Configuration for Router:
   
  controller E1 0
  framing NO-CRC4
  channel-group 0 timeslots 1
  channel-group 1 timeslots 2,7-9,20 speed 64
  !
  interface Serial4/0:0
  ip address 16.217.30.2 255.255.255.252
  encapsulation ppp
  !
  interface Serial4/0:1
  ip address 16.205.30.5 255.255.255.252
   
  X.25 Example
   
  在配置X.25 , 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.
   
  Configuration for Router:
   
  interface serial 0
  ip address 131.108.100.1 255.255.255.0
  encapsulation x25
  x25 address 041673226839
  x25 htc 16
  x25 map ip 131.108.100.2 041675222222
  int s 0.1
  ip address 131.108.101.1 255.255.255.0
  x25 map ip 131.108.101.2 041674222222
  !
  ip route 131.108.100.0 255.255.255.0 131.108.100.2
  ip route 131.108.101.0 255.255.255.0 131.108.101.2

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