Help to configure DHCP severs

Hello friends,

I need to configure these networks on my router mikrotik RB951g-2hnd:

ETh1: WAN, using ppoe, for this I have configured the ppoe client with the data of my ISP and it works correctly:

ETh2: LAN, with the network 192.168.1.0/24 and address 192.168.1.250, DHCP is not necessary, the lan server win2008 takes care of it, it also works.

Main Wifi: in the same lan as ETh2 that is 192.168.1.0/24 to have access to the lan and internet, but it is necessary to assign DHCP addresses from 1,240 to 1,249, for this I tried to activate dhcp, but I it says that it can not because it is a slave interface, I have also tried to configure ETh3 with the parameters and then make a bridge with the WLAN, but the same …

Wifi guests: in a different network for example 192.178.10.0/24, with internet access but not LAN with DHCP server

Can you help me please?



regards