On 01/11/2017 11:35 AM, Christopher wrote:
> On Wed, Jan 11, 2017 at 1:01 PM Rick Stevens <ri...@alldigital.com
> <mailto:ri...@alldigital.com>> wrote:
>
> On 01/10/2017 07:30 PM, Chris Murphy wrote:
> > [chris@f25h Downloads]$ iperf -c 10.0.0.3
> > ------------------------------------------------------------
> > Client connecting to 10.0.0.3, TCP port 5001
> > TCP window size: 85.0 KByte (default)
> > ------------------------------------------------------------
> > [ 3] local 10.0.0.4 port 52272 connected with 10.0.0.3 port 5001
> > [ ID] Interval Transfer Bandwidth
> > [ 3] 0.0-10.1 sec 35.4 MBytes 29.5 Mbits/sec
> > [chris@f25h Downloads]$
> >
> >
> >
> > [chris@f25s ~]$ iperf -s
> > ------------------------------------------------------------
> > Server listening on TCP port 5001
> > TCP window size: 85.3 KByte (default)
> > ------------------------------------------------------------
> > [ 4] local 10.0.0.3 port 5001 connected with 10.0.0.4 port 52272
> > [ ID] Interval Transfer Bandwidth
> > [ 4] 0.0-10.4 sec 35.4 MBytes 28.5 Mbits/sec
>
> Yeah, OK, that's pretty sucky. So it does look like it's the driver
> or firmware or some setting on the interface that's limiting the speed.
> I guess you could try "iw dev wlan0 link" to see what speed it thinks
> it's running at and "iw dev wlan0 scan dump" to see more details, but
> I don't know what else to try. Are you using any special hardware
> drivers (e.g. nVidia binaries, etc.)? They might have an effect.
>
>
> My output from those looks like:
>
> $ iw dev wlp1s0 link
> Connected to xx:xx:xx:xx:xx:xx (on wlp1s0)
> SSID: mywifi
> freq: 2412
> RX: 762410485 bytes (555995 packets)
> TX: 33098952 bytes (236527 packets)
> signal: -52 dBm
> tx bitrate: 130.0 MBit/s MCS 15
>
> bss flags:short-preamble short-slot-time
> dtim period:1
> beacon int:100
> $ iw dev wlp1s0 scan dump
> BSS xx:xx:xx:xx:xx:xx(on wlp1s0) -- associated
> TSF: 338136964783 usec (3d, 21:55:36)
> freq: 2412
> beacon interval: 100 TUs
> capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
> signal: -50.00 dBm
> last seen: 29084 ms ago
> Information elements from Probe Response frame:
> SSID: mywifi
> Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
> DS Parameter set: channel 1
> Power constraint: 0 dB
> RSN:* Version: 1
> * Group cipher: CCMP
> * Pairwise ciphers: CCMP
> * Authentication suites: PSK
> * Capabilities: 1-PTKSA-RC 1-GTKSA-RC (0x0000)
> WPA:* Version: 1
> * Group cipher: CCMP
> * Pairwise ciphers: CCMP
> * Authentication suites: PSK
> ERP: <no flags>
> Extended supported rates: 24.0 36.0 48.0 54.0
> WMM:* Parameter version 1
> * BE: CW 15-1023, AIFSN 3
> * BK: CW 15-1023, AIFSN 7
> * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
> * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
> HT capabilities:
> Capabilities: 0x138c
> HT20
> SM Power Save disabled
> TX STBC
> RX STBC 3-streams
> Max AMSDU length: 3839 bytes
> DSSS/CCK HT40
> Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
> Minimum RX AMPDU time spacing: 8 usec (0x06)
> HT RX MCS rate indexes supported: 0-15
> HT TX MCS rate indexes are undefined
> HT operation:
> * primary channel: 1
> * secondary channel offset: no secondary
> * STA channel width: 20 MHz
> * RIFS: 1
> * HT protection: no
> * non-GF present: 0
> * OBSS non-GF present: 0
> * dual beacon: 0
> * dual CTS protection: 0
> * STBC beacon: 0
> * L-SIG TXOP Prot: 0
> * PCO active: 0
> * PCO phase: 0
> Country: USEnvironment: Indoor/Outdoor
> Channels [1 - 11] @ 27 dBm
>
> This should be 802.11n (only n, no backwards compatibility for b),
> WPA2-PSK. I'm not quite sure how to interpret the above, to know if
> anything stands out.
It's interesting that your n bitrates show up in the "extended supported
rates" rather than the "standard rates". I'm not a wifi guru so I can't
interpret a lot of that either. Here's what I have:
[root@golem4 ~]# iw dev wlan0 link
Connected to 38:2c:4a:a1:0b:d8 (on wlan0)
SSID: AD
freq: 2437
RX: 18784014 bytes (126013 packets)
TX: 56599 bytes (408 packets)
signal: -25 dBm
tx bitrate: 57.8 MBit/s MCS 5 short GI
bss flags: short-preamble short-slot-time
dtim period: 3
beacon int: 100
You have new mail in /var/spool/mail/root
[root@golem4 ~]# iw dev wlan0 scan dump
BSS 38:2c:4a:a1:0b:d8(on wlan0) -- associated
TSF: 7695565369786 usec (89d, 01:39:25)
freq: 2437
beacon interval: 100 TUs
capability: ESS Privacy ShortSlotTime RadioMeasure (0x1411)
signal: -25.00 dBm
last seen: 71897 ms ago
Information elements from Probe Response frame:
SSID: AD
Supported rates: 1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0
DS Parameter set: channel 6
ERP: <no flags>
ERP D4.0: <no flags>
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
Extended supported rates: 6.0 9.0 12.0 48.0
BSS Load:
* station count: 17
* channel utilisation: 55/255
* available admission capacity: 0 [*32us]
HT capabilities:
Capabilities: 0x19ad
RX LDPC
HT20
SM Power Save disabled
RX HT20 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 4 usec (0x05)
HT RX MCS rate indexes supported: 0-23
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 6
* secondary channel offset: no secondary
* STA channel width: 20 MHz
* RIFS: 1
* HT protection: nonmember
* non-GF present: 1
* OBSS non-GF present: 1
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
Overlapping BSS scan params:
* passive dwell: 20 TUs
* active dwell: 10 TUs
* channel width trigger scan interval: 300 s
* scan passive total per channel: 200 TUs
* scan active total per channel: 20 TUs
* BSS width channel transition delay factor: 5
* OBSS Scan Activity Threshold: 0.25 %
Extended capabilities: HT Information Exchange Supported, Extended
Channel Switching, BSS Transition, 6
WPS: * Version: 1.0
* Wi-Fi Protected Setup State: 2 (Configured)
* Response Type: 3 (AP)
* UUID: dcd55186-d913-1df1-3a01-d06461bf5d81
* Manufacturer: ASUSTeK Computer Inc.
* Model: Wi-Fi Protected Setup Router
* Model Number: RT-AC87U
* Serial Number:
* Primary Device Type: 6-0050f204-1
* Device name: RT-AC87U
* Config methods: Display
* RF Bands: 0x1
* Unknown TLV (0x1049, 6 bytes): 00 37 2a 00 01 20
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
My link shows a 57.8Mbit transmit rate and my access point (from the
"scan dump" shows the n rates in the "supported rates" area.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ri...@alldigital.com -
- AIM/Skype: therps2 ICQ: 226437340 Yahoo: origrps2 -
- -
- LOOK OUT!!! BEHIND YOU!!! -
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