Cisco 877 ADSL by pass

if you need following kind of design use this on 877

---adsl router ---cisco 1811 router---lan
      by pass         external IP/FW

!
interface ATM0
no ip address
no atm ilmi-keepalive
pvc 8/35
encapsulation aal5snap
!
dsl operating-mode auto
bridge-group 1
!
!
interface Vlan1
no ip address
bridge-group 1
!
bridge 1 protocol ieee
!


http://forums.whirlpool.net.au/archive/920734