ตัวอย่างนี้ เป็น การทำ NAT และ DHCP

192.168.1.0/24---LAN---192.168.1.1---[Router]----61.19.196.34-------WAN----

//

hostname Internet_Cafe
!
boot system flash
enable password cisco
!
ip subnet-zero
!
ip dhcp pool DHCPoolLan0
network 192.168.1.0 255.255.255.0
dns-server 202.47.249.4 202.6.107.7
default-router 192.168.1.1
!
!
!
!
interface Ethernet0
ip address 192.168.1.1 255.255.255.0
ip nat inside
!
interface Serial0
ip address 61.19.196.34 255.255.255.252
ip nat outside
!
ip nat inside source list 1 interface Serial0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 61.19.196.33
ip route 61.19.198.88 255.255.255.248 Ethernet0
ip http server
ip pim bidir-enable
!
!
access-list 1 permit 192.168.1.0 0.0.0.255
!
line con 0
stopbits 1
line vty 0 4
password cisco
logging synchronous
login
!
end