hostapd + channel bonding + 5GHz

Johannes Berg johannes at sipsolutions.net
Mon Feb 21 11:05:26 EST 2011


On Mon, 2011-02-21 at 17:57 +0200, Jouni Malinen wrote:
> On Thu, Feb 17, 2011 at 05:40:14PM -0800, Lara Deek wrote:
> > The ht_capab parameter in hostapd.conf enables 40MHz operation
> > ([HT40-][HT40+]). I understand hostapd enables channel bonding only if there
> > will be no channel/bandwidth overlap with neighboring APs (802.11n: scan for
> > overlapping BSSes before starting 20/40MHz channel). Is there some way where
> > I can control 40MHz vs. 20MHz operation myself without it being censored by
> > hostapd?
> 
> Not without modifying the source code. hostapd will enforce 20/40 MHz
> coexistence rules based on the mandatory standard requirements.

Also note that these restrictions don't just exist to annoy you -- if
you have BSSs that overlap in certain ways performance in both can
severely degrade in both.

johannes



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