Should AP advertise as HT20/40 if it can only run HT20?
johannes at sipsolutions.net
Fri Nov 6 11:24:14 PST 2015
On Fri, 2015-11-06 at 10:51 -0800, Ben Greear wrote:
> We configured an AP to run on channel 6, HT40+.
> But, due to scan results, it decided it could only run HT20 due to
> overlapping BSS.
> The scan results show it as having HT20/40 capability but
> no secondary channel.
> Is this expected? I was thinking it might should not be advertising
> the HT40. We are running local patches, possibly we messed up
No, this is correct and expected. The capability and the actual
operation need not match. In theory, the AP could re-determine later
whether or not it's allowed to operate as HT20 (say the overlapping BSS
goes away) and dynamically reconfigure the *operation* on the fly - it
cannot change its capabilities.
More information about the Hostap