Virtual-ppp1 Configuration for Cisco 881

1.
pseudowire-class CABLE
 encapsulation l2tpv2
 ip local interface FastEthernet4


2.
interface FastEthernet4
 ip address dhcp client-id FastEthernet4
 duplex auto
 speed auto


3.
interface Virtual-PPP1
 ip address negotiated
 ip virtual-reassembly in
 ppp pap sent-username username password 123456
 no cdp enable
 pseudowire a.b.c.d  pw-class CABLE

* a.b.c.d = l2tp gateway  (IP) of your ISP