On Wed, Jan 11, 2017 at 1:01 PM Rick Stevens <ricks@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: US Environment: 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.

--
Christopher