一，网络规划。
公司某部门需要建立一个70人办公的无线局域
AP获取的网段为10.0.0.0/24
user获取的是20.0.0.0/24
二，网络拓扑如下
三，交换机的配置
vlan batch 10 20
interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 10 20
interface GigabitEthernet0/0/2 port link-type trunk port trunk pvid vlan 20 port trunk allow-pass vlan 10 20 四，AC的配置
sysname AC
vlan batch 10 20
wlan ac-global carrier id other ac id 1
dhcp enable
interface Vlanif10 ip address 10.0.0.1 255.255.255.0 dhcp select interface
interface Vlanif20 ip address 20.0.0.1 255.255.255.0 dhcp select interface
interface MEth0/0/1
interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 10 20
interface GigabitEthernet0/0/15
interface Wlan-Ess1 port hybrid pvid vlan 20 port hybrid untagged vlan 20
wlan
wlan ac source interface vlanif10
ap-auth-mode no-auth
ap id 0 type-id 19 mac 00e0-fc8a-10b0 sn 210235448310071F4139
wmm-profile name 1 id 0
traffic-profile name 1 id 0
security-profile name 1 id 0
service-set name 1 id 0
wlan-ess 1
ssid 1
traffic-profile id 0
security-profile id 0
service-vlan 20
radio-profile name 1 id 0
wmm-profile id 0
ap 0 radio 0
radio-profile id 0
service-set id 0 wlan 1
五，结果用户侧无法获得IP地址。
六，故障分析
经过排查发现交换机接AP的端口VLAN打错导致用户无法获取到IP地址，
interface GigabitEthernet0/0/2
port link-type trunk
port trunk pvid vlan 10
port trunk allow-pass vlan 10 20
7，经过处理AP恢复正常。
