华为AC+AP组网用户获取地址失败。
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> #
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>
wmm-profile name 1>
traffic-profile name 1>
security-profile name 1>
service-set name 1> wlan-ess 1
ssid 1
traffic-profile>
security-profile> service-vlan 20
radio-profile name 1>
wmm-profile> ap 0 radio 0
radio-profile>
service-set> 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。
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