动态IP地址的 DSL

动态IP地址的 DSL 以下是俺花了半个小时整理的动态IP地址的 DSL+NAT，但愿对初学者 有所帮助。 1，After the router has reloaded, enter enable mode again. Router>enable Router# 2，Configure service timestamp to properly log and display debug output in the troubleshooting section. Router#configure terminal Router(config)#service timestamps debug datetime msec Router(config)#service timestamps log datetime msec Router(config)#end 3，Disable logging console on your Cisco DSL Router to suppress console messages that may be triggered while you are configuring the router. Router#configure terminal Router(config)#no logging console Router(config)#end 4，Configure ip routing, ip subnet-zero, and ip classless to provide flexibility in routing configuration options. Router#configure terminal Router(config)#ip routing Router(config)#ip subnet-zero Router(config)#ip classless Router(config)#end 5，Configure global Point-to-Point Protocol over Ethernet (PPPoE) parameters. Router#configure terminal Router(config)#vpdn enable Router(config)#no vpdn logging Router(config)#vpdn-group pppoe Router(config-vpdn)#request-dialin Router(config-vpdn-req-in)#protocol pppoe Router(config-vpdn-req-in)#end 6， Configure an IP address and subnet mask on the Cisco DSL Router Ethernet interface. (Optional) Enable NAT inside on the Ethernet interface. Router#configure terminal Router(config)#interface ethernet 0 Router(config-if)#ip tcp adjust-mss 1452/ip adjust-mss 1452 Router(config-if)#ip address 192.168.1.2 255.255.255.252 Router(config-if)#ip nat inside Router(config-if)#no shut Router(config-if)#end 7,Configure the ATM interface of your Cisco DSL Router with an ATM permanent virtual circuit (PVC), encapsulation type, and Dialer pool. Router#configure terminal Router(config)#interface atm 0 Router(config-if)#pvc 0/35 (Guizhou Province) Router(config-if-atm-vc)#pppoe-client dial-pool-number 1 Router(config-if-atm-vc)#no shut Router(config-if-atm-vc)#end 8, Configure the Dialer interface of your Cisco DSL Router for Point-to-Point Protocol over ATM (PPPoA) to enable a dynamic IP address to be assigned. (Optional) Enable NAT outside on the Dialer interface. Router#configure terminal Router(config)#interface dialer 1 Router(config-if)#ip address negotiated Router(config-if)#mtu 1492 Router(config-if)#no ip directed-broadcast Router(config-if)#ip nat outside Router(config-if)#encapsulation ppp Router(config-if)#dialer pool 1 Router(config-if)#ppp auth chap hostname heiye Router(config-if)#ppp auth chap password heiye Router(config-if)#ppp auth pap sent-username heiye password heiye Router(config-if)#end 9,Configure a default route using Dialer1 as the outbound interface. Router#configure terminal Router(config)#ip route 0.0.0.0 0.0.0.0 dialer1 Router(config)#end 10, Configure global NAT commands on the Cisco DSL Router to allow sharing of the dynamic public IP address of the Dialer interface. Router#configure terminal Router(config)#ip nat inside source list 1 interface dialer1 overload Router(config)#access-list 1 permit 192.168.1.3 0.0.0.255 Router(config)#end 11,Optional Configurations NAT Pool, if additional IP addresses have been provided by your ISP. Router(config)#ip nat inside source list 1 pool ciscooverload Router(config)#ip nat pool cisco 200.1.1. 200.1.1.254 netmask 255.255.255. 0 Router(config)#end 12, Static NAT, if Internet users require access to internal servers. Router(config)#ip nat inside source static tcp 192.168.1.5 80 200.1.1.5 80 extendable Router(config)#end 13,(Optional) Configure the Cisco DSL Router as a DHCP server with a pool of IP addresses to assign to hosts connected to the Ethernet interface of the Cisco DSL Router. The DHCP server dynamically assigns an IP address, Domain Name Server (DNS), and the default gateway IP address to your hosts. Router#configure terminal Router(config)#ip dhcp excluded-address 192.168.21.2(E0 ip address) Router(config)#ip dhcp pool wang Router(dhcp-config)#network 192.168.1.2 255.255.255.0 Router(dhcp-config)#default-router 192.168.1.2 Router(dhcp-config)#dns-server 202.98.198.168 202.98.192.68 Router(dhcp-config)#end 14, Enable the logging console on the Cisco DSL Router, and write all the changes to memory. Router#configure terminal Router(config)#logging console Router(config)#end *Jan 1 00:00:00.100: %SYS-5-CONFIG_I: Configured from console by console Router#write memory/copy run start Building configuration... [OK] Router#show run Router#show ip int brief to view the IP interface status.