Configuring a Cisco 1700/2600/3600 ADSL WIC as a PPPoE Client With NAT

!
vpdn enable
no vpdn logging
!
vpdn-group pppoe
  request-dialin

!--- You are the PPPoE client that asks to establish a session
!--- with the aggregation unit (6400 NRP). These VPDN commands
!--- are not needed with Cisco IOS Software Release 12.2(13)T
!--- or later.

   protocol pppoe
!

!--- 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-keepalive
 bundle-enable
 dsl operating-mode auto
 hold-queue 224 in

!--- All defaults.
!--- PPPoE runs on top of AAL5SNAP. However, the
!--- encap aal5snap command is not used.

!
interface ATM0.1 point-to-point
 pvc 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.

 !

!--- The PPPoE client code ties into a dialer interface upon
!--- 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 the ATM interface.

 ppp authentication chap callin
 ppp chap hostname <username>
 ppp chap password <password>
!

!--- The ISP instructs you about the type of authentication
!--- to use.
!--- To change from PPP Challenge Handshake Authentication
!--- Protocol (CHAP) to PPP Password Authentication Protocol
!--- (PAP), replace these three lines:
!---    ppp authentication chap callin
!---    ppp chap hostname <username>
!---    ppp chap password <password>
!--- with these two lines:
!---    ppp authentication pap callin
!---    ppp pap sent-username <username> password <password>
!--- For NAT, overload on the Dialer1 interface and add a
!--- default route out, because the 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 0.0.0.255 

!--- For NAT. 

!