Прилагаю базовый конфиг для настройки ADSL-ной цыски с поддержкой Стрим + ТВ, а также DHCP.
Конфиг подойдет для всех версий ADSL-ных цысок начиная с 827 и заканчивая 877.
Данный пример для 857/877.
Приставку можно подключать к любому порту встроенного или внешнего свича.
На старых цысках (827) нет встроенного свича, следовательно нет и интерфейса vlan 1.
Соответственно, все настройки с интерфейса vlan 1 плавно копируются на интерфейс eth 0.
Надеюсь, конфиг кому-нибудь пригодится.
Ну а теперь сам конфиг:

!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
enable password ciscorulez
!
no aaa new-model
!
!
resource policy
!
no ip dhcp use vrf connected
!
ip dhcp pool home
   network 192.168.100.0 255.255.255.0
   default-router 192.168.100.1
   dns-server 212.188.4.10 195.34.32.116
!
!
ip cef
ip name-server 212.188.4.10
ip name-server 195.34.32.116
no ip igmp snooping
!
!
!
bridge irb
!
!
!
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
!
interface ATM0.150 point-to-point
no snmp trap link-status
pvc 1/50
  encapsulation aal5snap
  pppoe-client dial-pool-number 1
!
!
interface ATM0.191 point-to-point
no snmp trap link-status
pvc 1/91
  encapsulation aal5snap
!
bridge-group 1
bridge-group 1 spanning-disabled
!
interface ATM0.192 point-to-point
no snmp trap link-status
pvc 1/92
  encapsulation aal5snap
!
bridge-group 1
bridge-group 1 spanning-disabled
!
interface FastEthernet0
spanning-tree portfast
!
interface FastEthernet1
spanning-tree portfast
!
interface FastEthernet2
spanning-tree portfast
!
interface FastEthernet3
spanning-tree portfast
!
interface Dot11Radio0
no ip address
!
encryption mode ciphers tkip
!
ssid home
    authentication open
    authentication key-management wpa
    guest-mode
    wpa-psk ascii 0 ciscorulez
!
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 output-pattern-list 1111
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
!
interface Vlan1
no ip address
bridge-group 1
bridge-group 1 output-pattern-list 1111
bridge-group 1 spanning-disabled
!
interface Dialer1
mtu 1492
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
dialer-group 1
no cdp enable
ppp chap hostname your-login
ppp chap password 0 your-password
!
interface BVI1
mac-address dead.beaf.dead
ip address 192.168.100.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip route 0.0.0.0 0.0.0.0 Dialer1
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface Dialer1 overload
!
access-list 1 permit 192.168.100.0 0.0.0.255
access-list 1111 deny   dead.beaf.dead 0000.0000.0000 ffff.ffff.ffff 0000.0000.0000 0x46 3 eq 0x202
access-list 1111 deny   dead.beaf.dead 0000.0000.0000 0002.0200.0000 0000.00ff.ffff 0x22 4 eq 0x430044
access-list 1111 permit 0000.0000.0000 ffff.ffff.ffff 0002.0200.0000 0000.00ff.ffff 0x22 4 eq 0x430044
access-list 1111 permit dead.beaf.dead 0000.0000.0000 0000.0000.0000 ffff.ffff.ffff 0x22 4 eq 0x430044
access-list 1111 deny   0000.0000.0000 ffff.ffff.ffff 0000.0000.0000 ffff.ffff.ffff 0x22 4 eq 0x430044
access-list 1111 permit 0000.0000.0000 ffff.ffff.ffff 0000.0000.0000 ffff.ffff.ffff
dialer-list 1 protocol ip list 1
no cdp run
!
control-plane
!
bridge 1 protocol ieee
bridge 1 route ip
!
line con 0
no modem enable
line aux 0
line vty 0 4
password ciscorulez
login
!
scheduler max-task-time 5000
end