Hello!

tl;dr: Is it possible to create a bridge on virtual wireless interfaces?

I tried to create a bridge of two virtual wireless interfaces, one for wifi 2G and another for wifi 5G, to allow L2 interconnection between interfaces. Also to have a DHCP server on that bridge that will serve both 2G and 5G a common pool of IP addresses. However, that bridge doesn't seem to work, neither DHCP server.
On the other hand, *real* wlan interfaces work happily inside a bridge along with other ether's.
I suspect that bridge doesn't work with already "slaved" ports by some other "master" (wlan1 and wlan2) I don't know too much about bridging and can't find anything helpful in documentation. So allow me to ask you if I do something the wrong way? Is this a feature or maybe a bug?

No, it has nothing to do with being master or slave, for a bridge between networks to work you need the proper mode= setting on the wireless interfaces, and the same manufacturer at each end.

No, it has nothing to do with being master or slave, for a bridge between networks to work you need the proper mode= setting on the wireless interfaces, and the same manufacturer at each end.

Thanks for reply.
I have wlan1 (2G) and wlan2 (5G) on the same router and their respective virtual vwlan1 and vwlan2. Both vwlan's have mode "ap bridge" like their parents, same SSID's (between each other, not parents) and security profiles. Clients are able to join them on wireless side, but the rest of stuff doesn't happen. DHCP namely.
What mode should I use?