Hi Andi,
I got it working on my 871w with IOS 12.4(15)T7. Hope this helps!
dot11 ssid ....myownssid...
vlan 1
authentication open
authentication key-management wpa
guest-mode
wpa-psk ascii 7 ....xxxxxx....
!
interface Dot11Radio0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip flow egress
ip nat inside
ip virtual-reassembly
ip route-cache flow
no dot11 extension aironet
!
encryption vlan 1 mode ciphers aes-ccm
!
ssid ....myownssid........
!
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
channel 2412
station-role root
no cdp enable
!
interface Dot11Radio0.1
encapsulation dot1Q 1 native
no cdp enable
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
