Using a cisco 2500 router for ADSL Access

Implementation of ADSL access using the cisco 2500 router Description: This case is Beijing Telecom's adsl PPPoE access. A common adsl modem and a cisco 2500 router (dual Ethernet port) are required, and IOS 12.2 (15) t, can achieve LAN Internet sharing. in this case, the configuration is divided into seven steps: www.2cto.com Step 1: Configure vpdnvpdn enable (vpdn-group office (create a vpdn group ,) request-dialin (initialize a vpnd tunnel and create a vpdn sub-group to which a request is dial in) protocol pppoe (vpdn sub-group uses pppoe to establish a session tunnel) Step 2: configure the interface for connecting the router to the adsl modem Ethernet1 no ip address pppoe enable allow the Ethernet interface to run pppoe-client dial-pool-number 1 to add the pppoe dial-up client of the Ethernet interface to the dial-up pool 1 third step: configure the logical dialing interface: interface Dialer1 ip address negotiated obtains the ip address nat outside from the dynamic negotiation by the adsl service provider. Enable NAT www.2cto.com encapsulation ppp for this interface. encapsulate the ppp protocol dialer pool 1. This interface uses the dialing pool no. 1. dial dialer-group 1 this command is of little significance to pppoe ppp authentication pap callin enable ppp pap verification ppp pap sent-username xxxxxxx password 0 yyyyyyy use the applied user name and password Step 4: configure the internal network interface Ethernet0 (internal network interface) ip address 10.1.1.1 255.255.255.0 ip nat inside to enable NAT for this interface Step 5: configure the router to provide the dhcp service ip dhcp excluded-address 10.1.1.1 ip dhcp pool ABC import all (import dns and wins server) www.2cto.com network 10.1.1.0 255.255.255.0 default-router 10.1.1.1 Step 6: configure NAT: access-list 1 permit 10.1.1.0 0.0.255 ip nat inside source list 1 interface Dialer1 overload Step 7: configure the default route ----- Yawei CCIE instructor Zhou Jun ip route 0.0.0.0 0.0.0.0 Dialer1 author Zhou Jun