dhcp不行

给你个参考，加粗的是值得关注的地方

(1)      配置端口属于VLAN及对应VLAN接口的IP地址（略）

(2)      配置DHCP服务

# 配置不参与自动分配的IP地址（DNS服务器、WINS服务器和网关地址）。

<SwitchA> system-view

[SwitchA] dhcp server forbidden-ip 10.1.1.2

[SwitchA] dhcp server forbidden-ip 10.1.1.4

[SwitchA] dhcp server forbidden-ip 10.1.1.126

[SwitchA] dhcp server forbidden-ip 10.1.1.254

# 配置DHCP地址池1，用来为10.1.1.0/25网段内的客户端分配IP地址和网络配置参数。

[SwitchA] dhcp server ip-pool 1

[SwitchA-dhcp-pool-1] network 10.1.1.0 mask 255.255.255.128

[SwitchA-dhcp-pool-1] expired day 10 hour 12

[SwitchA-dhcp-pool-1] domain-name ***.***

[SwitchA-dhcp-pool-1] dns-list 10.1.1.2

[SwitchA-dhcp-pool-1] gateway-list 10.1.1.126

[SwitchA-dhcp-pool-1] nbns-list 10.1.1.4

[SwitchA-dhcp-pool-1] quit

# 配置DHCP地址池2，用来为10.1.1.128/25网段内的客户端分配IP地址和网络配置参数。

[SwitchA] dhcp server ip-pool 2

[SwitchA-dhcp-pool-2] network 10.1.1.128 mask 255.255.255.128

[SwitchA-dhcp-pool-2] expired day 5

[SwitchA-dhcp-pool-2] domain-name ***.***

[SwitchA-dhcp-pool-2] dns-list 10.1.1.2

[SwitchA-dhcp-pool-2] gateway-list 10.1.1.254

[SwitchA-dhcp-pool-2] quit

# 开启DHCP服务。

[SwitchA] dhcp enable

# 配置VLAN接口10和VLAN接口20工作在DHCP服务器模式。

[SwitchA] interface vlan-interface 10

[SwitchA-Vlan-interface10] dhcp select server

[SwitchA-Vlan-interface10] quit

[SwitchA] interface vlan-interface 20

[SwitchA-Vlan-interface20] dhcp select server

[SwitchA-Vlan-interface20] quit