这个配置比起原来的有固定ip地址的配置要难很多，要考虑到方方面面的东西，在这里，大家可以少走弯路了： vpdn enable no vpdn logging ! vpdn-group pppoe request-dialin protocol pppoe ! interface Ethernet0 no shut ip address <ip addres
s> <subnet mask> ip adjust-mss 1452 ip nat inside no ip directed-broadcast ! interface ATM0 no shut no ip address no ip directed-broadcast no atm ilmi-keepalive bundle-enable ! interface ATM0.1 point-to-point no ip directed-broadcast pvc <vpi/vci> pppoe-client dial-pool-number 1 ! ! interface Dialer1 ip address negotiated mtu 1492 ip nat outside encapsulation ppp dialer pool 1 ppp chap hostname <username> ppp chap password <password> ppp pap sent-username <username> password <password> ! ip nat inside source list 1 interface Dialer1 overload ! ip classless ip route 0.0.0.0 0.0.0.0 dialer1 access-list 1 permit <ip address of ethernet0> 0.0.255.255
