In DFS mode with "radar detect", how much time it takes to rescan again to know if the frequency is free, or once it scans and find a free channel it remains forever in that frequency even if the frequency has became used by a radar. RouterOS 4.2 and Regulatory Domain for Portugal using 5 ...

Confirmed. In RouterOS 4.2 the DHCP Client is working. (I've upgraded RouterOS to 4.2 and firmware to 2.23) Note: the new firmware is available in the routerboard package present in RouterOS 4.2, not in RouterBoard web page. How to upgrade bootloader: http://wiki.mikrotik.com/wiki/Bootloader_upgrade

On Ether2 and Ether3; We didn't tried Ether1 because it was connected to the PC to use winbox.

I've just upgraded ROS 4.0RC1 to 4.1 and the DHCP Client stop working, it's all the time searching and doesn't acquire IP.
To solve this I made a downgrade to ROS 4.0RC1 and DHCP Client start working again.

Does anyone have the same problem?
My router: RB433UAH