i do have 3 sites (office, and 2 appartments) that each one of them has an adsl connection.
the office is the main site and has a mikrotik 750 that holds the pppoe of the adsl connection. the other 2 sites connect through pptp to the office.
the two sites have a linux box on site A and a mikrotik 750 on site B that hols the adsl connection's pppoe.
due to some requirements i would like to have the 2 mikrotiks to have port5 to pass 'pure' layer 2 traffic. the third site that has a linux box (debian 7, with 3 ethernets) it will connect in the near future.
could someone help me how to setup this?