Hello. I'm trying to setup the above MT after a dump switch to use it only wirelessly. The problem is that there is no running DHCP on the dump switch. I want when connect to MT wirelessly to receive IP address from the same subnet like the dump switch. Is it possible ? NAT is not an option.

Is "dump switch" some enterprise technology I don't know about, or do you mean good old non-managed dumb switch? If it's the latter, then just bridge all hAPs interfaces together and then:

a) If there's already some DHCP server in LAN, you're done.
b) If there isn't any DHCP server in LAN and you want hAP to be DHCP server, then make it one.

Yes, non-managed switch. The Google auto correct space technology.... In DHCP server do I need to set gateway, netmask, etc... I'll try it tomorrow.

Nope. It's not working. The DHCP is lited red when set it to work on bridge1. In bridge1 are eth1 (dumb switch), wlan1 and wlan2. If there is no DHCP working and I set IP manually on PC it's working fine. Where is my mistake ?

EDIT: OK, just make it working. I was forget network prefix in DHCP server
Thanks a lot