thats wrong, and your next past confirms it ...
br0 is NOT a brige port
and you can NOT choose the port of the switch you link to.
you OBVIOuSLY dont know how this device is soldered.
And finally, your guess IS WRONG.
br0 IS NOT an alias nor a filter.
I told you to read about wds because tutos tell about this difference. Maybe you readed words, but your brain did not understood them.
without br0, eth0 and wlan0 are just ... independant !
there is NO hardware brige, and there is no default hard link.
briging eth to wlan IS SOFTWARE !!!
wlan0 is NOT an ethernet NIC with an antena, but a NIC dedicated to wireless.
the fact you wrote 1000000messages in groups does not mean you know what you write about.
NO wireless card is briged. NONE.
Briging IS NOT A PROTOCOL, but asoftware setup.
did you ever set up MANUALLY a wireless card ? what is wlan0 ? how is br0 set up un the WRT ?
there is no such protocol as briging ! and 802.11 is only supported by dedicated cards.
there IS, and I do it every morning: iptables.
*********the more I read your old posts, the more I see you speak cluelessly.