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内网三层架构：核心层、汇聚层、接入层

VLAN划分：10、20、30

网段：192.168.10.1/24、192.168.20.1/24、192.168.30.1/24

网络拓扑如下:

配置思路：

步骤一：核心交换机开启DHCP服务、创建VLAN 10 20 30,创建地址池，配置接口类型

步骤二：汇聚交换机创建VLAN,配置上下联接口类型

步骤三：接入交换机创建VLAN，配置上下联接口类型

配置命令：

核心交换机

sys
sys XIAN_CORE_SW_01
dhcp enable
vlan 10 20 30
interface range g1/0/1
port link-type trunk
port trunk permit vlan 10
interface range g1/0/2
port link-type trunk
port trunk permit vlan 20
interface range g1/0/3
port link-type trunk
port trunk permit vlan 30
dhcp server ip-pool 10
gateway-list 192.168.10.1
network 192.168.10.0 mask 255.255.255.0
dns-list 218.30.19.50 61.134.1.5
dhcp server ip-pool 20
gateway-list 192.168.20.1
network 192.168.20.0 mask 255.255.255.0
dns-list 218.30.19.50 61.134.1.5
dhcp server ip-pool 30
gateway-list 192.168.30.1
network 192.168.30.0 mask 255.255.255.0
dns-list 218.30.19.50 61.134.1.5
interface Vlan-interface 10
ip add 192.168.10.1 24
dhcp server apply ip-pool 10
interface Vlan-interface 20
ip add 192.168.20.1 24
dhcp server apply ip-pool 20
interface Vlan-interface 30
ip add 192.168.30.1 24
dhcp server apply ip-pool 30

汇聚交换机：

sys
sys XIAN_CON_SW_01
vlan 10
interface range g1/0/1 to g1/0/2 g1/0/48
port link-type trunk
port trunk permit vlan 10

sys
sys XIAN_CON_SW_02
vlan 20
interface range g1/0/1 to g1/0/2 g1/0/48
port link-type trunk
port trunk permit vlan 20

sys
sys XIAN_CON_SW_03
vlan 30
interface range g1/0/1 to g1/0/2 g1/0/48
port link-type trunk
port trunk permit vlan 30

接入交换机：

sys
sys XIAN_ACCESS_SW_01
vlan 10
interface g1/0/48
port link-type trunk
port trunk permit vlan 10
interface g1/0/1
port link-type access
port access vlan 10

sys
sys XIAN_ACCESS_SW_02
vlan 10
interface g1/0/48
port link-type trunk
port trunk permit vlan 10
interface g1/0/1
port link-type access
port access vlan 10

sys
sys XIAN_ACCESS_SW_03
vlan 20
interface g1/0/48
port link-type trunk
port trunk permit vlan 20
interface g1/0/1
port link-type access
port access vlan 20

sys
sys XIAN_ACCESS_SW_04
vlan 20
interface g1/0/48
port link-type trunk
port trunk permit vlan 20
interface g1/0/1
port link-type access
port access vlan 20

sys
sys XIAN_ACCESS_SW_05
vlan 30
interface g1/0/48
port link-type trunk
port trunk permit vlan 30
interface g1/0/1
port link-type access
port access vlan 30

sys
sys XIAN_ACCESS_SW_06
vlan 30
interface g1/0/48
port link-type trunk
port trunk permit vlan 30
interface g1/0/1
port link-type access
port access vlan 30

验证：

PC设备上配置DHCP，可以获取到地址

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