I have a Cisco 1801 and the internet speed is just too slow comparing to my old Cisco 837. Here is my 1801's configuration:
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode adsl2
!
interface ATM0.1 point-to-point
no snmp trap link-status
pvc 0/35
encapsulation aal5mux ppp dialer
pppoe-client dial-pool-number 1
!
interface Vlan1
no ip address
bridge-group 1
!
interface Dialer0
ip address negotiated
ip nat outside
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname XXXXXXXX
ppp chap password XXXXXXXX
ppp pap sent-username XXXXXXXX password XXXXXXXX
!
interface BVI1
ip address 192.168.1.1 255.255.255.0
ip nat inside
!
Note that I have changed different
dsl operating-mode but still the same.
Thanks for your help.
