Cisco 1841 ile adsl konfigurasyonu asagidaki gibidir,

murat>enable
murat#conf terminal
murat(config)#int ATM ATM 0/0/0
murat(config-if)#no ip address
murat(config-if)#dsl operating-mode auto
murat(config-if)#pvc 8/35
murat(config-if-atm-vc)#pppoe-client dial-pool-number 1
murat(config-if-atm-vc)#exit-vc
murat(config-if)#no shutdown
murat(config)#int dialer 0
murat(config-if)#ip address negotiated
murat(config-if)#encapsulation ppp
murat(config-if)#dialer pool 1
murat(config-if)#ppp authentication pap callin
murat(config-if)#ppp pap sent-username kullanici@ttnet password sifre
murat(config-if)#ppp ipcp dns request
murat(config-if)#ip nat outside
murat(config-if)#mtu 1500
murat(config-if)#exit
murat(config-if)#ip route 0.0.0.0 0.0.0.0 dialer0
murat(config)#interface FastEthernet 0/0
murat(config-if)#ip address 192.168.1.1 255.255.255.0
murat(config-if)#ip nat inside
murat(config)#access-list 101 permit ip 192.168.1.1 0.255.255.255 any
murat(config)#ip nat inside source list 101 interface dialer0 overload
DHCP icin
murat(config)#ip dns server
murat(config)#ip dhcp pool clients
murat(dhcp-config)#import all
murat(dhcp-config)#network 192.168.1.0 255.255.255.0
murat(dhcp-config)#default router 192.168.1.1
murat(dhcp-config)#dns-server 195.175.39.40 195.175.39.39 212.175.105.35

Yardimlarindan dolayi Sayin Genco YILMAZ ‘a tesekkur ederim.
NOT : Cisco 877 Modelin de ayni konf. kullanabilirsiniz.