My iperf3 server is a rather powerful machine with Linux with a 3.10 kernel and an Intel I219-LM NIC and is easily capable of line rate. I have verified that if I plug my client into the Cat6 cable that services the WAPac that it can get 940megabits with iperf3 to the same iperf3 server, so I think I have ruled out cabling being an issue, the cabling is the same that was used for my AirPorts.
As a comparison, my AirPort Extremes under the same environment settings achieved peak of ~100Mbps on 802.11n and >500Mbps for 802.11ac actual download transfer rate, the highest I am seeing on my Miktrotik is 802.11n with only a single station registered is <20Mbps for 802.11n and ~200Mbps for 802.11ac. I never had only a single station registered on the AirPort Extremes during the testing. I also disabled the radios on the "other" AP to avoid conflicts but the results didn't improve, where I had both of the AirPort Extremes configured for the same channels for both 802.11n (1) and 802.11ac (149).
When looking at my clients (Apple devices with Broadcom BCM43xx 1.0) I noticed that none of them were showing 802.11ac negotiated transmit rates, it appears that the channel selection being used for the extension channels may not be compatible on these devices. I can't find anything that outlines the recommend configuration for the channel width selection options 20/40/80mhz-Ceee | 20/40/80mhz-eCee | 20/40/80mhz-eeCe | 20/40/80mhz-eeeC. I can't find any references that refer to "e" and "C" for extension and control channels, and the RouterOS documentation doesn't cover it beyond saying what the options are. I switched to using 20/40/80mhz-Ceee and the clients at least seems to negotiate a higher transfer rate but they don't actually observe better speeds. The clients report:
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Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165
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[admin@UpstairsWAPac] /interface wireless> frequency-monitor
number: 0
FREQ USE NF
5180MHz 1.8% -105
5200MHz 0% -105
5220MHz 1.5% -105
5240MHz 0% -103
5745MHz 0% -101
5765MHz 0% -101
5785MHz 0.1% -101
5805MHz 0% -100
5825MHz 0% -100Code: Select all
[admin@BasementWAPac] /interface wireless> frequency-monitor
number: 0
FREQ USE NF
5180MHz 0% -106
5200MHz 0% -106
5220MHz 1.4% -106
5240MHz 0% -103
5745MHz 0% -105
5765MHz 0% -102
5785MHz 19.3% -103
5805MHz 0.1% -103
5825MHz 0% -103Code: Select all
set [ find default-name=wlan1 ] band=2ghz-b/g/n country="united states" disabled=no frequency=2437 frequency-mode=regulatory-domain max-station-count=100 mode=ap-bridge multicast-helper=full name="Bamboo Forest" security-profile="Bamboo Forest" \
ssid="Bamboo Forest" wireless-protocol=802.11 wmm-support=enabled wps-mode=disabled
add disabled=no keepalive-frames=disabled mac-address=E6:8D:8C:C2:47:33 master-interface="Bamboo Forest" mode=ap-bridge multicast-buffering=disabled name="Bamboo Guest" security-profile="Bamboo Guest" ssid="Bamboo Guest" vlan-id=1003 vlan-mode=\
use-tag wds-cost-range=0 wds-default-cost=0 wps-mode=disabled
add default-forwarding=no disabled=no keepalive-frames=disabled mac-address=E6:8D:8C:C2:47:34 master-interface="Bamboo Forest" mode=ap-bridge multicast-buffering=disabled multicast-helper=disabled name="Bamboo IoT" security-profile=IoT ssid=\
"Bamboo IoT" vlan-id=10 vlan-mode=use-tag wds-cost-range=0 wds-default-cost=0 wps-mode=disabled
add disabled=no keepalive-frames=disabled mac-address=E6:8D:8C:C2:47:35 master-interface="Bamboo Forest" mode=ap-bridge multicast-buffering=disabled name=bamboozled security-profile="Bamboo Forest" ssid=bamboozled vlan-id=10 vlan-mode=use-tag \
wds-cost-range=0 wds-default-cost=0 wps-mode=disabledCode: Select all
[admin@UpstairsWAPac] /interface wireless registration-table> print stats
0 interface=Bamboo 5GHz mac-address=AC:BC:32:A6:3E:67 ap=no wds=no bridge=no rx-rate="6.5Mbps-20MHz/1S" tx-rate="1053Mbps-80MHz/3S" packets=35584,192170 bytes=3396299,284269235 frames=6281,98638 frame-bytes=3742920,285930098 hw-frames=13794,101720
hw-frame-bytes=15610265,290097186 tx-frames-timed-out=0 uptime=5m59s last-activity=590ms signal-strength=-46dBm@6Mbps signal-to-noise=58dB signal-strength-ch0=-50dBm signal-strength-ch1=-48dBm signal-strength-ch2=-55dBm
strength-at-rates=-46dBm@6Mbps 590ms tx-ccq=84% p-throughput=807408 distance=1 last-ip=192.168.1.11 802.1x-port-enabled=yes authentication-type=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm management-protection=no wmm-enabled=yes
tx-rate-set="OFDM:6-54 BW:1x-4x SGI:1x-4x HT:0-23 VHTMCS:SS1=0-9,SS2=0-9,SS3=0-9"The iperf3 -c output:
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Connecting to host 192.168.1.5, port 5201
[ 4] local 192.168.1.11 port 58851 connected to 192.168.1.5 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 9.67 MBytes 81.0 Mbits/sec
[ 4] 1.00-2.00 sec 12.1 MBytes 101 Mbits/sec
[ 4] 2.00-3.00 sec 21.8 MBytes 183 Mbits/sec
[ 4] 3.00-4.00 sec 59.2 MBytes 496 Mbits/sec
[ 4] 4.00-5.00 sec 60.5 MBytes 508 Mbits/sec
[ 4] 5.00-6.00 sec 50.2 MBytes 419 Mbits/sec
[ 4] 6.00-7.00 sec 433 KBytes 3.56 Mbits/sec
[ 4] 7.00-8.00 sec 191 KBytes 1.57 Mbits/sec
[ 4] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 9.00-10.00 sec 14.2 MBytes 119 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 228 MBytes 191 Mbits/sec sender
[ 4] 0.00-10.00 sec 228 MBytes 191 Mbits/sec receiverCode: Select all
50 packets transmitted, 50 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.886/4.315/34.362/6.582 msCode: Select all
50 packets transmitted, 50 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.855/62.374/214.639/53.542 msWould greatly appreciate any pointers on what to look for as the cause of this. As for channel selection any recommendations there or should I just use "auto"? Is Ceee going to be the most universally supported or is it more co-dependent upon the channel selected?
