启动接口，分配IP地址：
router
router enable
router#
router# configure terminal
router(config)#
router(config)# interface Type Port
router(config-if)# no shutdown
router(config-if)# ip address IP-Address Subnet-Mask
router(config-if)# ＾z
配置RIP路由协议：30秒更新一次
router(config)# router rip
router(config-if)# network Network-Number
router(config-if)# ＾z
配置IGRP路由协议：90秒更新一次
router(config)# router igrp AS-Number
router(config-if)# network Network-Number
router(config-if)# ＾z
配置Novell IPX路由协议：Novell RIP 60秒更新一次
router(config)# ipx routing [node address]
router(config)# ipx maximum-paths Paths
router(config)# interface Type Port
router(config-if)# ipx network Network-Number [encapsulation encapsulation-type] [secondary]
router(config-if)# ＾z
配置DDR：
router(config)# dialer-list Group-Number protocol Protocol-Type permit [list ACL-Number]
router(config)# interface bri 0
router(config-if)# dialer-group Group-Number
router(config-if)# dialer map Protocol-Type Next-Hop-Address name Hostname Telphone-Number
router(config-if)# ＾z
配置ISDN：
router(config)# isdn swith-type Swith-Type
router(config-if)# ＾z
配置Frame Relay：
router(config-if)# encapsulation frame-relay [cisco ietf ]
router(config-if)# frame-relay lmi-type [ansi cisco q933a ]
router(config-if)# bandwidth kilobits
router(config-if)# frame-relay invers-arp [ Protocol ] [dlci ]
router(config)# frame-relay Protocol Protocol-Address DLCI [ Broadcast ] [ ietf cisco ] [ payload-compress packet-by-packet ]
--
router(config-if)# keepalive Number
--
router(config-if)# frame-lelay local-dlci Number
--
router(config-if)# interface Type Port.Subininterface-Number [ multipoint point-to-point ]
router(config-subif)# ip unnumbered Interface
router(config-subif)# frame-lelay local-dlci Number
--
router(config-if)# ＾z
配置标准ACL：
router(config)# Access-list Access-List-Number [ permit deny ] source [ source-mask ]
router(config)# interface Type Port
router(config-if)# ip access-group Access-List-Number [ in out ]
router(config-if)# ＾z
配置扩展ACL：
router(config)# access-list Access-List-Number [ permit deny ] [ Protocol Protocol-Number ] source source-wildcard [ Source-Port ] destination destination-wildcard [ Destination-Port ] [ established ]
router(config)# interface Type Port
router(config-if)# ip access-group Access-List-Number [ in out ]
router(config-if)# ＾z
配置命名ACL：
router(config)# ip access-list [ standard extended ] ACL-Name
router(config [ std- ext- ] nacl)# [ permit deny ] [ IP-Access-List-Test-Conditions ]
router(config [ std- ext- ] nacl)# no [ permit deny ] [ IP-Access-List-Test-Conditions ]
router(config [ std- ext- ] nacl)# ＾z
router(config)# interface Type Port
router(config-if)# ip access-group [ACL-Name 1~199 ] [ in out ]
router(config-if)# ＾z
配置DCE时钟：
router# show controllers Type Port
router(confin-if)# clock rate 64000
router(config-if)# ＾z
配置PPP协议：
router(config)# username Name passWord Set-Password-Here
router(config)# interface Type Port
router(config-if)# encapsulation ppp
router(config-if)# ppp outhentication [ chap chap pap pap chap pap ]
router(config-if)# ppp pap sent-username Name password Password
router(config-if)# ＾z
PAP单向认证配置实例：
验证方：
router-server(config)# username Client password 12345
router-server(config)# interface serial 0
router-server(config-if)# encapsulation ppp
router-server(config-if)# ppp authentication pap
router-server(config-if)# ＾z
被验证方：
router-client(config-if)# encapsulation ppp
router-client(config-if)# ppp pap sent-username Client password 12345
router-client(config-if)# ＾z
PAP双向认证配置实例：
路由器 A：
routerA(config)# username B password 12345
routerA(config)# interface serial 0
routerA(config-if)# encapsulation ppp
routerA(config-if)# ppp authentication pap
routerA(config-if)# ppp pap sent-username A password 54321
routerA(config-if)# ＾z
路由器 B：
routerB(config)# username A password 54321
routerB(config)# interface serial 1
routerB(config-if)# encapsulation ppp
routerB(config-if)# ppp authentication pap
routerB(config-if)# ppp pap sent-username B password 12345
routerB(config-if)# ＾z
CHAP单向认证配置实例：
验证方：
router-server(config)# username router-client password 12345
router-server(config)# interface serial 0
router-server(config-if)# encapsulation ppp
router-server(config-if)# ppp authentication chap
router-server(config-if)# ＾z
被验证方：
router-client(config-if)# encapsulation ppp
router-client(config-if)# ppp authentication chap
router-client(config-if)# ppp chap hostname router-client
router-client(config-if)# ppp chap password 12345
router-client(config-if)# ＾z
CHAP双向认证配置实例：
路由器 A：
routerA(config)# username routerB password 12345
routerA(config)# interface serial 0
routerA(config-if)# encapsulation ppp
routerA(config-if)# ppp authentication chap
routerA(config-if)# ppp chap hostname routerA
routerA(config-if)# ppp chap password 54321
routerA(config-if)# ＾z
路由器 B：
routerB(config)# username routerA password 54321
routerB(config)# interface serial 1
routerB(config-if)# encapsulation ppp
routerB(config-if)# ppp authentication chap
routerB(config-if)# ppp chap hostname routerB
routerB(config-if)# ppp chap password 12345
routerB(config-if)# ＾z
Telnet使用：
routerA# terminal monitor
routerA# telnet IP-Address [ Router-Name ]
routerB# [ exit logout ]
routerB# ++再按
routerA# show sessions
routerA# Connect-Number
routerA# disconnect IP-Address [ Router-Name ]
routerA# show user
routerA# clear line [ 0 1 2 3 4 ]
禁止任何Telnet到本机：
router(config)# line vty 0 4
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