局域网:192.168.100.1----192.168.100.254
路由器局域网端口:192.168.100.1 子网掩码:255.255.255.0
网络分配的合法ip地址范围:61.159.62.128-----61.159.62.135
路由器广域网中的ip:61.159.62.129 子网掩码:255.255.255.248
转换的地址:61.159.62.130----61.159.62.134

一,interface serial 0
ip address 61.159.62.129 255.255.255.248
ip nat outside