At first glance there seems to be an issue with DHCP when running on a bridge.
When an interface is slave to a bridge it seems that it doesn’t respond to DHCP client requests.
What’s really weird is that I have numerous installations with bridges and DHCP server running on them without a problem whatsoever!
But trying your configuration (or even a new one from scratch) I cannot get an IP from DHCP when on bridge.
When I put the dhcp server on the interface directly and disable the bridge then it works right away!
It may be an issue with the latest versions of Mikrotik when creating new DHCP servers and/or bridges (but not if those were created on older versions?)
The working installations that I have have been set up many versions ago and I was just upgrading them.
I haven’t set up a bridge/dhcp in the last stable version of mikrotik (6.30.2).
So, at first glance it seems that there’s an issue with DHCP when running on a bridge.
Can anyone else confirm that?