Return-path: Received: from mail.candelatech.com ([208.74.158.172]:47306 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753233Ab1BGUEY (ORCPT ); Mon, 7 Feb 2011 15:04:24 -0500 Message-ID: <4D50503E.4090007@candelatech.com> Date: Mon, 07 Feb 2011 12:04:14 -0800 From: Ben Greear MIME-Version: 1.0 To: Daniel Halperin CC: Felix Fietkau , "linux-wireless@vger.kernel.org" Subject: Re: Scanning and channel types. References: <4D4EF004.3040109@candelatech.com> <4D4EF99D.5020601@openwrt.org> <4D4EFC76.6090000@candelatech.com> <4D4EFD87.4010005@openwrt.org> <4D4EFF68.9060101@candelatech.com> <4D4F0D83.4040401@candelatech.com> <4D4F0DFF.9010703@openwrt.org> <4D5033DE.4070701@candelatech.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 02/07/2011 10:32 AM, Daniel Halperin wrote: > Start on 2.4 GHz AP with HT Only (not just HT40) set. That is, AP > that doesn't allow 1 Mbps packets to be sent. Scan, make sure 1 mbps > packets are sent. I configured my AP with the conf file below. Radio is configured for HT20. Is that what you mean?? On channel 3 (off-channel), probe request is sent at 1Mbps On channel 8 (on-channel), probe request (and deauth) is sent at 1Mbps. [root@lec-2010p-ath9k-3x3 wifi]# cat /debug/ieee80211/wiphy0/ath9k/wiphy wiphy0 (chan=8 center-freq: 2447 MHz channel-type: 1 (ht20)) addr: 00:15:6d:84:65:0b addrmask: ff:ea:a1:3f:12:f5 rfilt: 0x597 UCAST MCAST BCAST BEACON PROBEREQ PHYERR COMP_BAR interface=vap0 driver=nl80211 logger_syslog=-1 logger_syslog_level=2 logger_stdout=-1 logger_stdout_level=2 dump_file=/home/lanforge/wifi/hostapd_vap0.dump ctrl_interface=/var/run/hostapd ctrl_interface_group=0 ssid=vap-3x3 bssid=00:00:33:44:88:01 country_code=US ieee80211d=0 hw_mode=g ieee80211n=1 channel=8 beacon_int=240 dtim_period=2 max_num_sta=2007 rts_threshold=2347 fragm_threshold=2346 preamble=0 macaddr_acl=0 auth_algs=3 ignore_broadcast_ssid=0 # Enable HT modes if you want 300Mbps+ throughput. #ht_capab=[HT20][HT40-][SHORT-GI-40] #ht_capab=[HT20][HT40+][SHORT-GI-40] wmm_enabled=1 wmm_ac_bk_cwmin=4 wmm_ac_bk_cwmax=10 wmm_ac_bk_aifs=7 wmm_ac_bk_txop_limit=0 wmm_ac_bk_acm=0 wmm_ac_be_aifs=3 wmm_ac_be_cwmin=4 wmm_ac_be_cwmax=10 wmm_ac_be_txop_limit=0 wmm_ac_be_acm=0 wmm_ac_vi_aifs=2 wmm_ac_vi_cwmin=3 wmm_ac_vi_cwmax=4 wmm_ac_vi_txop_limit=94 wmm_ac_vi_acm=0 wmm_ac_vo_aifs=2 wmm_ac_vo_cwmin=2 wmm_ac_vo_cwmax=3 wmm_ac_vo_txop_limit=47 wmm_ac_vo_acm=0 ieee8021x=0 eapol_key_index_workaround=0 eap_server=0 own_ip_addr=127.0.0.1 wpa=1 wpa_pairwise=TKIP CCMP wpa_passphrase=vap-3x3-passwd > > Start on 5 GHZ AP with HT Only set. Scan. What rate are probes sent > at for 2.4 GHz? (Using slightly different hostapd.conf config file, of course) On 5Ghz channels, they are sent at 6Mbps On channel 3 (2.4Ghz), they are sent at 1Mbps That seem right? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com