Configure PPPoE for connecting a CISCO router to an ADSL modem using the Cisco router: 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! Www.2cto.com 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 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 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! End Cisco router connection to adsl wic card PPPoE configuration: vpdn-group pppoe request-dialin! --- We are the PPPoE client requesting to establish! --- A session with the aggregation unit (6400 NRP). protocol pppoe! Www.2cto.com! --- 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! --- Encap aal5snap command is not used .! Interface ATM 0.1 point-to-point PVCs 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. www.2cto.com!! --- The PPPoE client code ties into a dialer interface! --- 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 <username> ppp chap password <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 <username>! --- Ppp chap password <password>! --- With the following two lines :! --- Ppp authentication pap callin! --- Ppp pap sent-username <username> password <password> www.2cto.com! --- 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 0.0.255