Why FreeBSD AP announce rates over 18Mbit/s as "Extended"?

[Lev Serebryakov]

Hello, Freebsd-wireless.

  I've sniffed all WiFi networks in my apartments (a lot of them!) and
 compare data in beacons. I found one strangeness:

   Almost all networks (supported by SOHO soapbox-routers like
 TP-Link, Zyxel and D-Link) announce rates 1b, 2b, 5.5b, 11b, 16, 24,
 26 and 54Mbit/s in "Supported rates" tag (tag #1) and only 6, 9, 12
 and 48Mbit/s goes to tag "Extended supported rates" (tag #50).

  And my AP FreeBSD-based) announce is rather different: 1b, 2b, 5.5b,
 11b, 16, 9, 12, 18Mbit/s goes to "Supported rates" (tag #1) and 24,
 26, 48 and 54Mbit/s goes to "Extended supported rates" (tag #50).

   It is reason why simple WiFi monitoring tools shows my AP as
  capable only 18Mbit/s. :)

   What is reason why FreeBSD is different from all other WiFi stacks?

-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>