Есть с857. Давненько работала. Потом лежала в ЗИПе, сейчас снова нужна.
Оператор РТК. ADSL. IOS: c850-advsecurityk9-mz.124-9.T3.bin

Интерфейсы поднимаются:

*Aug 30 18:04:11.327: %LINK-3-UPDOWN: Interface ATM0, changed state to up
*Aug 30 18:04:12.327: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to up
*Aug 30 18:04:20.531: %DIALER-6-BIND: Interface Vi1 boun
*Aug 30 18:04:20.539: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
*Aug 30 18:04:22.311: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up

IP Dialer0 получает:

Interface IP-Address OK? Method Status Protocol
FastEthernet0 unassigned YES unset up down
FastEthernet1 unassigned YES unset administratively down down
FastEthernet2 unassigned YES unset administratively down down
FastEthernet3 unassigned YES unset up down
ATM0 unassigned YES NVRAM up up
Vlan1 10.1.1.1 YES NVRAM up down
NVI0 unassigned NO unset up up
Dialer0 178.187.255.213 YES IPCP up up
Virtual-Access1 unassigned YES unset up up

Далее по IP и по имени пинги в инет не идут
В том числе не пингуется 178.187.255.213

Конфиг:

hostname R0
!
resource policy
!
clock timezone NSK 7
no ip dhcp use vrf connected
!
ip dhcp pool Pool
      network 10.1.1.0 255.255.255.0
      default-router 10.1.1.1
!
!
ip cef
ip name-server 212.94.96.70
ip name-server 212.94.96.124
!
password encryption aes
!
!
username cisco privilege 15 password 0 cisco
!
!
!
!
!
!
interface ATM0
  no ip address
  no atm ilmi-keepalive
  pvc 0/35
    encapsulation aal5snap
    pppoe-client dial-pool-number 1
  !
  dsl operating-mode itu-dmt
!
interface FastEthernet0
  no cdp enable
!
interface FastEthernet1
  shutdown
  no cdp enable
!
interface FastEthernet2
  shutdown
  no cdp enable
!
interface FastEthernet3
  no cdp enable
!
interface Vlan1
  ip address 10.1.1.1 255.255.255.0
  ip nat inside
  ip virtual-reassembly
!
interface Dialer0
  ip address negotiated
  ip mtu 1452
  ip nat outside
  ip virtual-reassembly
  encapsulation ppp
  ip tcp adjust-mss 1430
  dialer pool 1
  dialer-group 1
  no cdp enable
  ppp authentication pap callin
  ppp pap sent-username 1 password 0 1
!
ip route 0.0.0.0 0.0.0.0 Dialer0
!
ip dns server
ip nat inside source list 1 interface Dialer0 overload
!
access-list 1 permit 10.1.1.0 0.0.0.255
dialer-list 1 protocol ip permit
no cdp run

• ADSL в Cisco 857,Mirage_sk, 11:10 , 20-Июл-12

>[оверквотинг удален]
>   ppp pap sent-username 1 password 0 1
> !
> ip route 0.0.0.0 0.0.0.0 Dialer0
> !
> ip dns server
> ip nat inside source list 1 interface Dialer0 overload
> !
> access-list 1 permit 10.1.1.0 0.0.0.255
> dialer-list 1 protocol ip permit
> no cdp run

Попробуете добавить:

ip route 0.0.0.0 0.0.0.0 x.x.x.x(provider gw)