LACP over Wireless

Hello Guys,

I serached to create LACP over wireless

My configuration is:

Switch Layer 3 sisco (or other) --------2 x RB911G - - - - radio link - - - - - 2 x RB911G ---------- switch sisco
I enabled LACP on all switch.

My problem is I would like create balancing over my 2 RB911G.
On the wiki, i understand that: it’s impossible because I have only 1 ethernet port on my RB.

Is it rigth?
If it’s wrong, I need your help to create it.as easily as possible.

Thank you for your help.

B.