Hi, it seems I am getting closer.
I see in http://wiki.openwrt.org/doc/recipes/broadcom.repeater at the end of the page that "The "magic" comes from the fact that the Broadcom chip really has two wifi interfaces that can be configured to work independ...
I see in http://wiki.openwrt.org/doc/recipes/broadcom.repeater at the end of the page that "The "magic" comes from the fact that the Broadcom chip really has two wifi interfaces that can be configured to work independ...