disable-running-check (yes | no; Default: no) When set to yes interface will always have running flag. If value is set to no', the router determines whether the card is up and running - for AP one or more clients have to be registered to it, for station, it should be connected to an AP.
Using this activates the master interface, even without an active connection as station-bridge. The slave WLAN (the AP bridge) appears in the wifi scanners and sends beacons. But as the master interface keeps scanning for its AP the frequency changes all the time (I disabled all the entries in the connect list, so WLAN1 did not find any). So I could not connect to the WLAN2 with a windows PC. "cannot connect to this network"