三层交换机与路由器对接上网教程

交换机作为网关，实现跨网段转发。同时作为DHCP服务器分配IP。路由器做NAT转换，使用户可以上外网。下面是小编带来的配置过程：

　　1、配置连接用户的接口和对应的VLANIF接口

system-view

[Huawei]vlan batch 2 3

[Huawei]interface g0/0/2

[Huawei-GigabitEthernet0/0/2]portlink-type access

[Huawei-GigabitEthernet0/0/2]portdefault vlan 2

[Huawei-GigabitEthernet0/0/2]quit

[Huawei]int g0/0/3

[Huawei-GigabitEthernet0/0/3]portlink-type access

[Huawei-GigabitEthernet0/0/3]portdefault vlan 3

[Huawei-GigabitEthernet0/0/3]q

[Huawei]int Vlanif 2

[Huawei-Vlanif2]ip 24

[Huawei-Vlanif2]quit

[Huawei]int vlanif 3

[Huawei-Vlanif3]ip 24

[Huawei-Vlanif3]quit

　　2、配置连接路由器的接口和对应的`VLANIF接口

[Huawei]vlan 100

[Huawei-vlan100]int g0/0/1

[Huawei-GigabitEthernet0/0/1]portlink-type access

[Huawei-port-group-default]portdefault vlan 100

[Huawei-port-group-default]quit

[Huawei]int Vlanif 100

[Huawei-Vlanif100]ip 24

[Huawei-Vlanif100]quit

　　3、配置缺省路由(下一跳地址为路由器内网口地址)

[Huawei]iproute-static

　　4、配置DHCP服务

[Huawei]dhcp enable

[Huawei]

[Huawei]int vlanif 2

[Huawei-Vlanif2]dhcp selectinterface

[Huawei-Vlanif2]dhcp serverdns-list

[Huawei-Vlanif2]quit

[Huawei]int vlanif 3

[Huawei-Vlanif3]dhcp selectinterface

[Huawei-Vlanif3]dhcp serverdns-list

[Huawei-Vlanif3]quit

　　1、配置连接交换机的接口对应的IP地址

sys

[Huawei]int g0/0/1

[Huawei-GigabitEthernet0/0/1]ipaddress 24

[Huawei-GigabitEthernet0/0/1]quit

　　2、配置连接公网的接口对应的IP地址

[Huawei]int g0/0/2

[Huawei-GigabitEthernet0/0/2]ipaddress 30

[Huawei-GigabitEthernet0/0/2]q

　　3、配置缺省路由和回程路由(路由器访问内网段，接口为连接路由器的VLANIF地址)

[Huawei]ip route-static

[Huawei]ip

　　4、配置NAT转换

[Huawei]acl number 2001

[Huawei-acl-basic-2001]rule 5permit source

[Huawei-acl-basic-2001]quit

[Huawei]int g0/0/2

[Huawei-GigabitEthernet0/0/2]natoutbound 2001

[Huawei-GigabitEthernet0/0/2]quit