Re: Wifi rates
Hi, Let's merge some more stuff into -HEAD first. it's likely there's some RF configuration problem which we can dig into in more detail but I can't do it whilst we've got broken Intel 5100 support (as then MY laptop doesn't work!) I have a spectrum analyser and I'm not afraid to use it. -adrian On 31 July 2013 06:36, Cedric GROSS wrote: > Hello, > >> >> Right, there's HT elements in there, so it looks likely you properly >> negotiated HT. >> >> >> > And the amrr output : >> > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: non-11n node >> > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=0, initial rate >> 0 >> >> That's the initial "I don't know what you are yet" selection. >> >> > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node Test >> > kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=16, initial rate 128 >> >> Here it negotiated 11n. The initial rate is 0x80, so MCS 0. >> > > I made progress : > Jul 31 14:59:40 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 14:59:48 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 14:59:50 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 14:59:59 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 15:00:01 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 15:00:02 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=158, retrycnt=0 > Jul 31 15:00:02 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=255, retrycnt=0 > Jul 31 15:00:03 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=260, retrycnt=4 > Jul 31 15:00:03 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=160, retrycnt=0 > Jul 31 15:00:04 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=132, retrycnt=0 > Jul 31 15:00:04 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=213, retrycnt=0 > Jul 31 15:00:05 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=203, retrycnt=0 > Jul 31 15:00:05 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=214, retrycnt=0 > Jul 31 15:00:06 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=186, retrycnt=1 > Jul 31 15:00:06 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=216, retrycnt=2 > Jul 31 15:00:07 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=243, retrycnt=1 > Jul 31 15:00:08 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=185, retrycnt=0 > Jul 31 15:00:08 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=122, retrycnt=0 > Jul 31 15:00:09 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=133, retrycnt=0 > Jul 31 15:00:09 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=185, retrycnt=2 > Jul 31 15:00:10 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=165, retrycnt=0 > Jul 31 15:00:11 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=114, retrycnt=0 > Jul 31 15:00:28 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 15:00:29 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=227, retrycnt=0 > Jul 31 15:00:29 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=255, retrycnt=0 > Jul 31 15:00:30 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=241, retrycnt=0 > Jul 31 15:00:30 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=99, retrycnt=0 > Jul 31 15:00:31 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=199, retrycnt=0 > Jul 31 15:00:31 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=111, retrycnt=2 > Jul 31 15:00:32 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=171, retrycnt=0 > Jul 31 15:00:33 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=210, retrycnt=3 > Jul 31 15:00:33 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=122, retrycnt=1 > Jul 31 15:00:34 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=218, retrycnt=0 > Jul 31 15:00:35 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=95, retrycnt=1 > Jul 31 15:00:43 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=11, retrycnt=0 > Jul 31 15:00:44 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate > 15, txcnt=22, retrycnt=0 > Jul 31 15:01:56 Test kernel: wlan0: [60:36:dd:93:34:56] amrr_node_init: > non-11n node > Jul 31 15:01:56 Test kernel: wlan0: [60:36:dd:93:34:56] AMRR: nrates=0, > initial rate 0 > > File transfer is still chaotic but start well. > I've done a TCP dump during transfer. It's seem
RE: Wifi rates
Hello, > > Right, there's HT elements in there, so it looks likely you properly > negotiated HT. > > > > And the amrr output : > > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: non-11n node > > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=0, initial rate > 0 > > That's the initial "I don't know what you are yet" selection. > > > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node Test > > kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=16, initial rate 128 > > Here it negotiated 11n. The initial rate is 0x80, so MCS 0. > I made progress : Jul 31 14:59:40 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 14:59:48 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 14:59:50 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 14:59:59 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 15:00:01 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 15:00:02 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=158, retrycnt=0 Jul 31 15:00:02 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=255, retrycnt=0 Jul 31 15:00:03 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=260, retrycnt=4 Jul 31 15:00:03 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=160, retrycnt=0 Jul 31 15:00:04 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=132, retrycnt=0 Jul 31 15:00:04 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=213, retrycnt=0 Jul 31 15:00:05 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=203, retrycnt=0 Jul 31 15:00:05 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=214, retrycnt=0 Jul 31 15:00:06 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=186, retrycnt=1 Jul 31 15:00:06 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=216, retrycnt=2 Jul 31 15:00:07 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=243, retrycnt=1 Jul 31 15:00:08 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=185, retrycnt=0 Jul 31 15:00:08 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=122, retrycnt=0 Jul 31 15:00:09 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=133, retrycnt=0 Jul 31 15:00:09 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=185, retrycnt=2 Jul 31 15:00:10 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=165, retrycnt=0 Jul 31 15:00:11 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=114, retrycnt=0 Jul 31 15:00:28 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 15:00:29 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=227, retrycnt=0 Jul 31 15:00:29 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=255, retrycnt=0 Jul 31 15:00:30 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=241, retrycnt=0 Jul 31 15:00:30 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=99, retrycnt=0 Jul 31 15:00:31 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=199, retrycnt=0 Jul 31 15:00:31 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=111, retrycnt=2 Jul 31 15:00:32 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=171, retrycnt=0 Jul 31 15:00:33 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=210, retrycnt=3 Jul 31 15:00:33 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=122, retrycnt=1 Jul 31 15:00:34 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=218, retrycnt=0 Jul 31 15:00:35 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=95, retrycnt=1 Jul 31 15:00:43 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=11, retrycnt=0 Jul 31 15:00:44 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=22, retrycnt=0 Jul 31 15:01:56 Test kernel: wlan0: [60:36:dd:93:34:56] amrr_node_init: non-11n node Jul 31 15:01:56 Test kernel: wlan0: [60:36:dd:93:34:56] AMRR: nrates=0, initial rate 0 File transfer is still chaotic but start well. I've done a TCP dump during transfer. It's seem that TCP window fill up and it's why transfer stop and speed going down. Sometime transfer restart, sometime just hang. Just to be sure: window size value in TCP packet is the window size available from emitter ? > > > -adrian Cedric ___ freebsd-wireless@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
Re: Wifi rates
On 30 July 2013 02:33, Cedric GROSS wrote: > [root@Test]/root#ifconfig -v wlan0 list sta > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 00:24:d4:97:80:2025 6M 18.50 1162 58480 EP AQEHTRS > SSID RATES B22,12,18,24,36> DSPARMS<5> ERP<0x4> XRATES<48,72,96,108> RSN uc:AES-CCMP km:8021X-PS > K> HTCAP > HTINFO asicmcs[]> WME cwmin 4 cwmax 10 txop 0] V > O[aifsn 2 cwmin 3 cwmax 4 txop 94] VI[aifsn 2 cwmin 2 cwmax 3 txop 47]> Right, there's HT elements in there, so it looks likely you properly negotiated HT. > And the amrr output : > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: non-11n node > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=0, initial rate 0 That's the initial "I don't know what you are yet" selection. > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=16, initial rate 128 Here it negotiated 11n. The initial rate is 0x80, so MCS 0. > Test kernel: wlan0: [00:24:d4:97:80:20] recv auth frame with algorithm 0 seq > 2 > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=16, initial rate 128 > Test kernel: wlan0: link state changed to UP > Test dhclient: New IP Address (wlan0): 192.168.1.20 > Test dhclient: New Subnet Mask (wlan0): 255.255.255.0 > Test dhclient: New Broadcast Address (wlan0): 192.168.1.255 > Test dhclient: New Routers (wlan0): 192.168.1.254 > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 15, txcnt=12, > retrycnt=144 The rate index starts at MCS0. > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR decreasing rate 14 (txcnt=12 > retrycnt=144) > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 14, txcnt=12, > retrycnt=192 > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR decreasing rate 13 (txcnt=12 > retrycnt=192) > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 13, txcnt=11, > retrycnt=176 > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR decreasing rate 12 (txcnt=11 > retrycnt=176) > ... > And so on until > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 0, txcnt=11, > retrycnt=176 > Test last message repeated 2 times > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate 0, txcnt=12, > retrycnt=192 And since there's errors at all transmission rates (look at the retrycnt), it eventually drops you down to 1mb. > What is 'nrates' and 'rate' in start of output ? Is nrates an index in rate > table ? Yes, look in ieee80211_phy.c . > After the dhclient, I started a ftp file transfer. As you can see rate > decrease to 0 very quickly. > Is the 'current rate' same as initial nrates value ? Nope. The debugging isn't very clear and I should fix it. But it's starting in the 11n rate table at MCS0 and it's going down very quickly into the non-11n rates. > I've found this for MCS : > http://www.digitalairwireless.com/wireless-blog/recent/demystifying-modulati > on-and-coding-scheme-index-values.html MCS is the 11n encoding scheme. So you're seeing significant transmit retries. That's worth investigating. (We still have to merge more code into -HEAD though.) -adrian ___ freebsd-wireless@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
RE: Wifi rates
> De : adrian.ch...@gmail.com [mailto:adrian.ch...@gmail.com] De la part > de Adrian Chadd > Envoyé : lundi 29 juillet 2013 21:08 > À : Cedric GROSS > Cc : freebsd-wireless@freebsd.org > Objet : Re: Wifi rates > > Hi, > > So the trick here is that iwn uses the net80211 rate control API for > doing things. > > Look at if_iwn.c for "ratectl". There's a spot in the TX path where it > calls it to look up the rate. > > It then converts that rate to the iwn PLCP format for the given > transmission rate. You can google "PLCP". Intel has a few extra bits in > that field for controlling the NIC behaviour. THat bit is straight > forward. > > Anyway - the trick here is that the net80211 rate control (amrr by > default) is going to be selecting transmission rates. You can see the > current rate by doing 'ifconfig wlan0 list sta'. Now, if you're running > -HEAD net80211 / iwn then AMRR knows about 11n and if_iwn will happily > use it. In the past it was hackier - AMRR didn't know about 11n rates > and so iwn "faked" things by pretending it was doing non-11n, and then > translating these to 11n rates. Hopefully you're running -HEAD and this > is no longer a problem. > > So - do an "ifconfig -v wlan0 list sta" to list the station > negotiation. It looks like it's doing 11ng but its downgraded to 11n. Right : [root@Test]/root#ifconfig -v wlan0 wlan0: flags=8843 metric 0 mtu 1500 ether 60:36:dd:93:34:56 inet 192.168.1.20 netmask 0xff00 broadcast 192.168.1.255 nd6 options=29 media: IEEE 802.11 Wireless Ethernet MCS mode 11ng status: associated ssid WLenine channel 5 (2432 MHz 11g ht/20) bssid 00:24:d4:97:80:20 regdomain 0 country US anywhere -ecm authmode WPA2/802.11i -wps -tsn privacy ON deftxkey UNDEF AES-CCM 2:128-bit powersavemode OFF powersavesleep 100 txpower 15 txpowmax 50.0 -dotd rtsthreshold 2346 fragthreshold 2346 bmiss 10 11a ucast NONEmgmt 6 Mb/s mcast 6 Mb/s maxretry 6 11b ucast NONEmgmt 1 Mb/s mcast 1 Mb/s maxretry 6 11g ucast NONEmgmt 1 Mb/s mcast 1 Mb/s maxretry 6 turboA ucast NONEmgmt 6 Mb/s mcast 6 Mb/s maxretry 6 turboG ucast NONEmgmt 1 Mb/s mcast 1 Mb/s maxretry 6 sturbo ucast NONEmgmt 6 Mb/s mcast 6 Mb/s maxretry 6 11naucast NONEmgmt 12 MCS mcast 12 MCS maxretry 6 11ngucast NONEmgmt 2 MCS mcast 2 MCS maxretry 6 halfucast NONEmgmt 3 Mb/s mcast 3 Mb/s maxretry 6 quarter ucast NONEmgmt 1 Mb/s mcast 1 Mb/s maxretry 6 scanvalid 450 bgscan bgscanintvl 300 bgscanidle 250 roam:11a rssi7dBm rate 12 Mb/s roam:11b rssi7dBm rate 1 Mb/s roam:11g rssi7dBm rate 5 Mb/s roam:turboA rssi7dBm rate 12 Mb/s roam:turboG rssi7dBm rate 12 Mb/s roam:sturbo rssi7dBm rate 12 Mb/s roam:11narssi7dBm MCS 1 roam:11ngrssi7dBm MCS 1 roam:halfrssi7dBm rate 6 Mb/s roam:quarter rssi7dBm rate 3 Mb/s -pureg protmode CTS ht htcompat ampdu ampdulimit 64k ampdudensity NA -amsdutx amsdurx shortgi htprotmode RTSCTS -puren -smps -rifs wme -burst -dwds roaming MANUAL bintval 96 AC_BE cwmin 4 cwmax 10 aifs 3 txopLimit 0 -acm ack cwmin 4 cwmax 10 aifs 3 txopLimit 0 -acm AC_BK cwmin 4 cwmax 10 aifs 7 txopLimit 0 -acm ack cwmin 4 cwmax 10 aifs 7 txopLimit 0 -acm AC_VI cwmin 3 cwmax 4 aifs 2 txopLimit 94 -acm ack cwmin 3 cwmax 4 aifs 2 txopLimit 94 -acm AC_VO cwmin 2 cwmax 3 aifs 2 txopLimit 47 -acm ack cwmin 2 cwmax 3 aifs 2 txopLimit 47 -acm groups: wlan [root@Test]/root#ifconfig -v wlan0 list sta ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG 00:24:d4:97:80:2025 6M 18.50 1162 58480 EP AQEHTRS SSID RATES DSPARMS<5> ERP<0x4> XRATES<48,72,96,108> RSN HTCAP HTINFO WME [root@Test]/root#ifconfig -v wlan0 list chan Channel 5 : 2432 MHz 11b Channel 5 : 2432 MHz 11g Channel 5 : 2432 MHz 11g ht/20 Channel 5 : 2432 MHz 11g ht/40+ Channel 5 : 2432 MHz 11g ht/40- And the amrr output : Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: non-11n node Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=0, initial rate 0 Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=16, initial rate 128 Test kernel: wlan0: [00:24:d4:97:80:20] recv auth frame with algorithm 0 seq 2 Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node Test kernel: wlan0: [00:24:d4:97:80:20
Re: Wifi rates
Hi, So the trick here is that iwn uses the net80211 rate control API for doing things. Look at if_iwn.c for "ratectl". There's a spot in the TX path where it calls it to look up the rate. It then converts that rate to the iwn PLCP format for the given transmission rate. You can google "PLCP". Intel has a few extra bits in that field for controlling the NIC behaviour. THat bit is straight forward. Anyway - the trick here is that the net80211 rate control (amrr by default) is going to be selecting transmission rates. You can see the current rate by doing 'ifconfig wlan0 list sta'. Now, if you're running -HEAD net80211 / iwn then AMRR knows about 11n and if_iwn will happily use it. In the past it was hackier - AMRR didn't know about 11n rates and so iwn "faked" things by pretending it was doing non-11n, and then translating these to 11n rates. Hopefully you're running -HEAD and this is no longer a problem. So - do an "ifconfig -v wlan0 list sta" to list the station negotiation. It looks like it's doing 11ng but its downgraded to 11n. If you have IEEE80211_DEBUG defined in your kernel config - and you're building the modules correctly, rather than just "make" in the modules directory, which is _not the correct way_ - then you can use "wlandebug -i wlanX +rate" to see the AMRR rate selection debugging. Do that before you associate and it'll tell you as it's making rate decisions. HTH, -adrian On 29 July 2013 11:41, Cedric GROSS wrote: > Hello, > > > > Part of splitting work, I continue to investigate on my side for my NIC > (Centrino 2230). > > > > I notice that from ifconfig wlan0 : > > media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11ng > > > > Rate is very slow and should be 54Mbps. > > > > I try to understand how rates is determined but it's really a mess. > > So first question : From where ifconfig get rate ? > > > > What's CCK, MCS, plcp stand for and what is relationship with rate ? > > > > I try following linux kernel also but it's a nightmare. > > > > Thanks. > > > > Cedric > > ___ > freebsd-wireless@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless > To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org" ___ freebsd-wireless@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
