Need to setup a 877 with an external ADSL modem in bridged mode? Maybe you have another modem which can sync/be more stable than the cisco and you wish to purely use the 877 as a router.
Following commands should help set it up..
Assign an ethernet interface to where it will use pppoe from, and assign it vlan2
interface FastEthernet3
description External DSL PPPoE
switchport access vlan 2
interface Vlan2
description External DSL PPPoE
no ip address
pppoe enable group global
pppoe-client dial-pool-number 2
setup a Dialer2 interface..
!
interface Dialer2
description connection to External DSL modem
ip address negotiated
ip access-group 101 in
no ip unreachables
ip nat outside
no ip virtual-reassembly
encapsulation ppp
ip tcp adjust-mss 1410
dialer pool 2
dialer idle-timeout 0
dialer-group 2
no cdp enable
ppp authentication chap callin
ppp chap hostname something@something
ppp chap password something
ip route 0.0.0.0 0.0.0.0 Dialer2
ip nat inside source list 102 interface Dialer2 overload
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