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Date: Fri, 23 Dec 2011 19:39:25 GMT
From: Adrian Chadd <adrian@FreeBSD.org>
To: freebsd-gnats-submit@FreeBSD.org
Subject: [net80211] overly-frequent HT occupancy changes
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>Number:         163574
>Category:       kern
>Synopsis:       [net80211] overly-frequent HT occupancy changes
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-wireless
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 23 19:40:11 UTC 2011
>Closed-Date:    
>Last-Modified:  Sat Dec 24 01:02:04 UTC 2011
>Originator:     Adrian Chadd
>Release:        FreeBSD-10.0, on a TP-WR1043ND router.
>Organization:
FreeBSD
>Environment:
FreeBSD home-11bg-ap 10.0-CURRENT FreeBSD 10.0-CURRENT #39: Thu Jan  1 08:00:00 WST 1970     adrian@dummy:/home/adrian/work/freebsd/git/adrianchadd-freebsd-work/obj/mipseb/mips.mipseb/home/adrian/work/freebsd/git/adrianchadd-freebsd-work/adrianchadd-freebsd-work/sys/TP-WN1043ND  mips

>Description:
When running this tplink in occupied 2.4GHz space, the AP instance frequently bounces between these states:

wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x13
wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x11
wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x13
wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x11
wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x13
wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x11
wlan0: [00:19:e0:66:66:68] HT bss occupancy change: 2 sta, 2 ht, 1 ht40, non-HT sta present, HT protmode now 0x13

. I'm not sure whether it's a problem but it is occuring very very
frequently and this may be interfering with station operation.
>How-To-Repeat:
* enable 11n
* throw the AP into a busy 2.4ghz environment with non-11n stuff around you
* wlandebug +11n
>Fix:
Not known.

>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-wireless 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sat Dec 24 01:01:31 UTC 2011 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=163574 
>Unformatted:
