Cisco 1142 胖AP 管理IP问题

5000转不换档

请教论坛里无线大神一个问题，Cisco1142AP当胖子用，现在只需要建立一个SSID，对应VLAN999，连到公司内网里，但是管理地址放到VLAN20，现在我配置完了 用户可以连wifi无线上网，获得的也是999VLAN的IP，但是管理IP连不上 也ping不通，谁知道哪里出错了 求救啊

conf t
no logging console

dot11 ssid ABC
   vlan 999
   authentication open
   authentication key-management wpa version 2
   mbssid guest-mode
   wpa-psk ascii 12345678
   exit

interface Dot11Radio0

encryption vlan 999 mode ciphers aes-ccm
mbssid
speed range
power local maximum
channel least-congested
antenna receive diversity
ssid ABC
no shut
exit


interface Dot11Radio1
encryption vlan 999 mode ciphers aes-ccm
mbssid
speed range
power local maximum
channel least-congested
antenna receive diversity
ssid ABC
no shut
exit



interface Dot11Radio1.999
encapsulation dot1Q 999
bridge-group 99
no shut
exit


interface Dot11Radio0.999
encapsulation dot1Q 999
bridge-group 99
no shut
exit

interface GigabitEthernet0
no shut
exit
interface GigabitEthernet0.999
encapsulation dot1Q 999
bridge-group 99
no shut
interface GigabitEthernet0.20
encapsulation dot1Q 20
bridge-group 20
no shut
exit

ip default-gateway 10.20.0.1
hostname AP

inter BVI 20
ip address 10.20.0.250 255.255.255.0
no shut
exit



no ip http server
no ip http secure-server
no username Cisco
no cdp run
clock timezone UTC +8
service password-encryption
crypto key generate rsa
########
1024
#######

ip ssh version 2
ip ssh loggin events
ip ssh time-out 60
ip ssh authentication-retries 3
line vty 0 15
transport input ssh
session-timeout 10
exec-timeout 10
exit
line con 0
login local
privilege level 15
exit
username cisco privilege 15 password 0 cisco
wr


交换机连AP的是trunk，allow vlan 20和999