Di seguito riporto un esempio di configurazione per router Cisco 827 con connessione Telecom Alice 7Mbit.
version 12.3 no service pad service timestamps debug uptime service timestamps log uptime service password-encryption ! hostname c827 ! boot-start-marker boot-end-marker ! enable secret xxxxxxxxxxxxxxxxxx ! no aaa new-model ip subnet-zero no ip domain lookup ip name-server 151.99.125.2 ip name-server 212.216.112.112 ip dhcp excluded-address 192.168.0.1 192.168.0.5 ! ip dhcp pool LAN network 192.168.0.0 255.255.255.0 default-router 192.168.0.1 dns-server 151.99.125.2 212.216.112.112 domain-name alessandro-pensato.it lease 0 12 ! ! interface Ethernet0 description Interfaccia Ethernet0/0 - Lan interna ip address 192.168.0.1 255.255.255.0 ip nat inside hold-queue 100 out ! interface ATM0 description Interfaccia ATM0/0 - Connessione ADSL no ip address no atm ilmi-keepalive pvc 8/35 encapsulation aal5mux ppp dialer dialer pool-member 1 ! dsl operating-mode ansi-dmt hold-queue 224 in ! interface Dialer0 description Interfaccia Dialer0/0 - Alice ADSL Flat 7Mega ip address negotiated ip nat outside encapsulation ppp dialer pool 1 ppp authentication chap callin ppp pap sent-username aliceadsl password 7 050A0A0622494F0D0A09 ! ip nat translation timeout 420 ip nat translation tcp-timeout 120 ip nat translation pptp-timeout 420 ip nat translation icmp-timeout 1 ip nat translation max-entries 1000 ip nat inside source list 1 interface Dialer0 overload ip classless ip route 0.0.0.0 0.0.0.0 Dialer0 no ip http server ! access-list 1 permit 192.168.0.0 0.0.0.255 ! line con 0 logging synchronous transport preferred all transport output all stopbits 1 line vty 0 4 access-class 1 in password xxxxxxxxxxxxxxxxxx logging synchronous login transport preferred all transport input all transport output all ! scheduler max-task-time 5000 ! end