Hi Wicaksono,
could you be a little more specific?
You are looking for a way to create wireless bridge between two APs, right?
For this we recommend to use MeshConnex policy (MCX) and map it as BSS1 on 5GHz enabled radio.
However I have WiNG 5.8 running the process is almost the same.
Go to Configuration - Wireless - MeshConnex Policy
Then under Configuration - Devices / Profile - Interfaces - Radio2 - WLAN / MESH mapping assign the MCX you created
If you need more details please refer to WiNG 5.5 Reference Guide or take a look into MeshConnex Overview document available under
following link
Edit:
Here is document for Virtual Controller environment
Regards,
Ondrej