都支持动态IP，都支持pppoe，但要配成vpdn的形式！

1、一在路由器上配wic-1adsl，配置如下：

vpdn enable
no vpdn logging
!
vpdn-group pppoe
request-dialin
protocol pppoe
!
interface Ethernet0
no shut
ip address
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
pppoe-client dial-pool-number 1
!
!
interface Dialer1
ip address negotiated
mtu 1492
ip nat outside
encapsulation ppp
dialer pool 1
ppp chap hostname
ppp chap password
ppp pap sent-username 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 0.0.255.255

2、ADSL猫和路由器搭配做，拨号在路由上做
!
vpdn enable
no vpdn logging
!--- default
!
vpdn-group pppoe
request-dialin
!--- we are the PPPoE client requesting to establish
!--- a session with the aggregation unit (6400 NRP)
protocol pppoe
!
int Dialer1
ip address negotiated
encapsulation ppp
ip mtu 1492
!--- Ethernet MTU is 1500 by default
!--- (1492 + PPPoE headers = 1500)
ip nat outside
dialer pool 1
!--- ties to interface Ethernet0
dialer-group 1
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
!
dialer-list 1 protocol ip permit
!
!--- internal Ethernet network
interface FastEthernet0
ip address 10.0.0.1 255.255.255.0
ip nat inside
!
interface Ethernet0
pppoe enable
pppoe-client dial-pool-number 1
!--- The PPPoE client code ties into a dialer
!--- interface upon which a virtual-access
!--- interface is cloned.
!
!--- For NAT we are going to overload on the
!--- Dialer1 interface and add a default route
!--- out of the Dialer1 interface since
!--- the 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
!
dialer-list 1 protocol ip permit
access-list 1 permit 10.0.0.0 0.0.0.255
!--- for NAT
!