了解Cisco路由器的ADSL modem实现上网设置

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　　路由器接入ADSL配置详解

　　1、Cisco路由器连接ADSL modem的PPPoE配置： 说明:此案例为北京电信adsl PPPoE接入,需要使用一个普通adsl modem和一台cisco 2500路由器(双以太口),IOS 12.2(15)T,能够实现局域网共享上网. 此案例配置共分7步: 第一步:配置vpdn vpdn e 1、Cisco路由器连接ADSL modem的PPPoE配置：说明:此案例为北京电信adsl PPPoE接入,需要使用一个普通adsl modem和一台cisco 2500路由器(双以太口),IOS 12.2(15)T,

　　能够实现局域网共享上网.此案例配置共分7步:

　　第一步:配置vpdnvpdn enable(启用路由器的虚拟专用拨号网络---d)vpdn-group office(建立一个vpdn组,)request-dialin(初始化一个d tunnel,建立一个请求拨入的vpdn子组,)protocol pppoe(vpdn子组使用pppoe建立会话隧道

　　)第二步: 配置路由器连接adsl modem的接口interface Ethernet1no ip addresspppoe enable允许以太接口运行pppoepppoe-client dial-pool-number 1将以太接口的pppoe拨号客户端加入拨号池1

　　第三步:配置逻辑拨号接口:interface Dialer1ip address negotiated从adsl服务商动态协商得到ip地址ip nat outside为该接口启用NATencapsulation ppp为该接口封装ppp协议dialer pool 1该接口使用1号拨号池进行拨号dialer-group 1该命令对于pppoe是意义不大的ppp authentication pap callin启用ppp pap验证ppp pap sent-username xxxxxxx password 0 yyyyyyy使用已经申请的用户名和口令

　　第四步:配置内部网络接口interface Ethernet0(内部网络接口)ip address 10.1.1.1 255.255.255.0ip nat inside为该接口启用NAT

　　第五步:配置路由器为内部网络主机提供dhcp服务ip dhcp excluded-address 10.1.1.1ip dhcp pool ABCimport all(导入dns和wins server)network 10.1.1.0 255.255.255.0default-router 10.1.1.1

　　第六步:配置NAT:access-list 1 permit 10.1.1.0 0.0.0.255cc第七步:配置缺省路由ip route 0.0.0.0 0.0.0.0 Dialer12、Cisco路由器连接ADSL WIC卡之PPPoE配置解:!vpdn enableno vpdn logging <=由于ADSL的PPPoE应用是通过虚拟拨号来实现的所以在路由器中需要使用VPDN的功能!vpdn-group pppoe <=为PPPoE启动了VPDN的进程request-dialinprotocol pppoe <=设置拨号协议为PPPoE!interface FastEthernet0 <=设置公司内部网络地址ip address 192.168.0.1 255.255.255.0ip nat inside <=为启用NAT转换，设置Fast ethernet端口为内部网络，从内部网络收到的数据的原地址转换为公网地址!interface ATM0/0 <=设置ADSL端口no ip address <=请不要设置地址no atm ilmi-keepalivebundle-enabledsl operating-mode autohold-queue 224 ininterface ATM0/0.1 point-to-point <=ADSL的通讯 依靠VC，所以必须设定点到点VCpvc 8/81 <=设置PVC的相关参数， 即VCI和VPI的值，如果不清楚请向局端查询pppoe-client dial-pool-number 1 <=PPPoE拨号进程使用了常规的拨号进程，这里引用了dialer-pool 1!interface Dialer1 <=建立一个虚拟拨号端口 ip address negotiated <=由于局端提供动态地址，所以必须设定地址为协商获得ip mtu 1492 <=修改mtu值以适用于ADSL网络ip nat outside <=为启用NAT转换，设置该端口为外部网络encapsulation ppp <=使用PPP的帧格式dialer pool 1ppp authentication pap callin <=设置拨号的验证方式为papppp pap sent vip pass vip <=发送用户名和密码ip nat inside source list 1 interface Dialer1 overload <=设置了NAT的转换方式，使用了dialer 1端口的动态地址!ip classlessip route 0.0.0.0 0.0.0.0 dialer1 <=将所有不可路由的数据报转发给ADSL线路，设定缺省路由no ip http server!access-list 1 permit 192.168.0.0 0.0.0.255

　　Cisco路由器连接ADSL modem的PPPoE配置：

　　hostname bjsite ! ip subnet-zero no ip domain-lookup ! vpdn enable no vpdn logging ! vpdn-group 1 request-dialin protocol pppoe ! interface Ethernet0/0 ip address 192.168.0.1 255.255.255.0 ip nat inside no ip mroute-cache ! ! ! ! interface Ethernet0/1 no ip address pppoe enable pppoe-client dial-pool-number 1 ! interface Dialer1 ip address negotiated ip nat outside ip mtu 1492 encapsulation ppp no ip mroute-cache dialer pool 1 dialer-group 1 ppp authentication pap ppp pap sent-username dg48907653@163.gd password xxxxxxxx! ip classless no ip http server ! dialer-list 1 protocol ip permit ip nat inside source list 1 interface Dialer1 overloadip route 0.0.0.0 0.0.0.0 dialer1 access-list 1 permit 192.168.0.0 0.0.0.255 ! line con 0 exec-timeout 0 0 transport input none line vty 0 4 login ! endCisco路由器连接ADSL WIC卡之PPPoE配置：vpdn-group pppoe request-dialin !--- we are the PPPoE client requesting to establish !--- a session with the aggregation unit (6400 NRP). protocol pppoe ! !--- internal Ethernet network.! interface FastEthernet0 ip address 10.92.1.182 255.255.255.0 ip nat inside !--- DSL interface.! interface ATM0 no ip address no atm ilmi-keepalivebundle-enabledsl operating-mode autohold-queue 224 in!--- All defaults.!--- PPPoE runs on top of AAL5SNAP, but the !--- encap aal5snap command is not used. ! interface ATM0.1 point-to-point pvc 1/1 pppoe-client dial-pool-number 1!--- pvc 1/1 is an example value that must be changed !--- to match the value used by the ISP. ! !--- The PPPoE client code ties into a dialer interface upon !--- which a virtual-access interface is cloned. ! interface Dialer1 ip address negotiated ip mtu 1492!--- Ethernet MTU default = 1500 (1492 + PPPoE headers = 1500)ip nat outside encapsulation ppp dialer pool 1!--- Ties to atm interface. ppp authentication chap callin ppp chap hostname ppp chap password ! !--- The ISP will instruct you regarding !--- the type of authentication to use. !--- To change from PPP CHAP to PPP PAP, !--- replace the following three lines:!--- ppp authentication chap callin !--- ppp chap hostname !--- ppp chap password !--- with the following two lines:!--- ppp authentication pap callin!--- ppp pap sent-username password !--- For NAT we are going to overload on the Dialer1 !--- interface and add a default route out !--- since dialer ip address can change. ip nat inside source list 1 interface Dialer1 overload ip classless ip route 0.0.0.0 0.0.0.0 dialer1 no ip http server ! access-list 1 permit 10.92.1.0 0.0.0.255-------------------------------------------用cisco路由器做PPPoE Server端配置enconf thostname Adsl_walkbirdusername walkbird password walkbirdvpdn enablevpdn-group pppoeaccept-dialinprotocol pppoevirtual-template 1exitexitinterface ethernet 0/0pppoe enableno shutdowninterface virtual-template 1mtu 1492 //PPP头部最大传输单元ip unnumbered loopback //借用地址peer default ip address pool pppoe_ip_poolencapsulation pppppp authentication papexitip local pool pppoe_ip_pool 11.11.11.10 11.11.11.100interface lookback0ip address 1.1.1.1 255.255.255.0no shutdownexit三、实验测试sh ip routesh ip int briefdebug pppoe eventsh ip int dialer 1