Hi, how to set the ethernet interface (ether1) on Routerboard to take dynamic IP assigned by ISP?
I tried to search the manual and this forum but haven’t found any solution. The manual only mentioned static IP (if I am not mistaken) 
The following is a brief description of what I am trying to do.
ISP-----------> ap_bridge <-------------------> station_wds ----> wireless clients
(Internet)__(Routerboard 1) __________(Routerboard 2)(PC/Laptop)
Public Network = (Dynamic IP from ISP)
Private Network = (static IP 192.168.0.X)
I have two Routerboard 411A.
I am trying to creat a point-to-point link (or WDS) between these two routerboards.
Until now I managed tio set the following successfully.
Routerboard 1:
Set as ap-bridge.
The wireless interface is assigned a static private IP: 192.168.0.X.
No IP setting for the ethernet interface.
Ethernet interafce is bridged with the wireless interface (ether1 - wlan1)
The ethernet interface should take the dynamic IP assigned by my ISP.
Routerboard 2:
Set as station-wds.
The wireless interface is assigned a static private IP: 192.168.0.X.
No IP setting for the ethernet interface.
With this setting both routerboard can communicate wirelessly and ping each other.
Now the problem is how to set the ethernet interface for my ap_bridge (routerboard 1) to take dynamic IP from my ISP? and how to set the routing issue so that teh wireless client connected to the station-wds (routerboard 2) can access the Internet through the ap_bridge (routerboard 1).
many thanks