admin //输入用户名
admin //输入密码

show run //查看运行配置

config t

int tunnel11
no tunnel source Dialer0
tunnel source F0/0
exit

int f0/0
ip address 1.1.1.1 255.255.255.0 //设置运营商提供的ip地址、子网掩码。将1.1.1.1 255.255.255.0替换为运营商提供的ip地址、子网掩码
no pppoe enable group global
no pppoe-client dial-pool-number 1
ip nat outside
exit

no ip route 0.0.0.0 0.0.0.0 Dialer0
ip route 0.0.0.0 0.0.0.0 1.1.1.1 //将1.1.1.1替换为运营商提供的网关

no ip nat inside source list NAT interface Dialer0 overload
ip nat inside source list NAT interface FastEthernet0/0 overload

exit
wr //保存设置