三層交換機與路由器對接上網教程

交換機作為網關，實現跨網段轉發。同時作為DHCP服務器分配IP。路由器做NAT轉換，使用户可以上外網。下面是小編帶來的配置過程：

　　1、配置連接用户的接口和對應的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、配置連接路由器的接口和對應的`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(下一跳地址為路由器內網口地址)

[Huawei]iproute-static

　　4、配置DHCP服務

[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

　　路由器配置(共4步)

　　1、配置連接交換機的接口對應的IP地址

sys

[Huawei]int g0/0/1

[Huawei-GigabitEthernet0/0/1]ipaddress 24

[Huawei-GigabitEthernet0/0/1]quit

　　2、配置連接公網的接口對應的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(路由器訪問內網段，接口為連接路由器的VLANIF地址)

[Huawei]ip route-static

[Huawei]ip

　　4、配置NAT轉換

[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