2011UiAS-2HnD-IN: constant signal drop outs

RouterOS Wireless Networking
1

Hi,

I observe very poor performance with 2011UAS-2HnD-IN: signal level is usually high, but it drops randomly several times a minute, then in a second or two returns to the normal values. During the signal drop I see packet loss or long delays.
What is the possible reason and how I can fix the issue?

Signal & SNR graphs attached. RouterOS 6.9

Wi-fi config:

/interface wireless
set [ find default-name=wlan1 ] adaptive-noise-immunity=ap-and-client-mode band=2ghz-b/g/n basic-rates-a/g=6Mbps,9Mbps,12Mbps basic-rates-b=“” bridge-mode=disabled country=russia disabled=no frequency=2437
frequency-mode=regulatory-domain ht-basic-mcs=mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 ht-supported-mcs=
mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,mcs-13,mcs-14,mcs-15,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-23 l2mtu=2290 mode=ap-bridge name=ngx2 preamble-mode=long rate-set=
configured ssid=ngx2 supported-rates-b=“” wds-default-bridge=bridge-local wireless-protocol=802.11
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys supplicant-identity=MikroTik wpa2-pre-shared-key=XXXXXXXXXX


/interface wireless registration-table> print stats (for one client)
5 interface=ngx2 mac-address=7C:D1:C3:EE:89:39 ap=no wds=no bridge=no rx-rate=“130.0Mbps” tx-rate=“130.0Mbps” packets=1308,1395 bytes=535958,155615 frames=1308,1397 frame-bytes=538570,147481 hw-frames=1790,1942
hw-frame-bytes=818323,216409 tx-frames-timed-out=0 uptime=3m3s last-activity=10ms signal-strength=-48dBm@6Mbps signal-to-noise=57dB signal-strength-ch0=-56dBm signal-strength-ch1=-49dBm
strength-at-rates=-50dBm@1Mbps 42s610ms,-48dBm@6Mbps 10ms,-45dBm@HT20-2 14s50ms,-45dBm@HT20-4 12s590ms,-45dBm@HT20-5 920ms,-45dBm@HT20-6 990ms,-45dBm@HT20-7 10ms tx-ccq=88% p-throughput=92290 distance=2
last-ip=192.168.43.190 802.1x-port-enabled=yes authentication-type=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm management-protection=no wmm-enabled=yes
signal.png

2

Is like volumetric alarm noises @2,4GHz…

3

Same problem… Any fix?

Enviado desde mi XT925 usando Tapatalk 2

4

Disconnect the alarms! (not only dsable, the sensors are still on…)

enviado desde mi Asus CG8250 usando RB493G con R52nM, Logitech G510 teclado y G700s ratones, monitor Samsung SyncMaster S24B300 con Microsoft Windows 7 Professional SP1 y Microsoft Internet Explorer 11

5

I have the same problem with 2011UAS-2HnD-IN. i do not buy them anymore

6

RB2011UiAS-2HnD-IN
MAC from 00:0C:42:D8:04:35 to 00:0C:42:D8:04:40
BIOS [firmware] 3.12
RouterOS 6.11
ether10 PoE out → CPE RB411+R52nM


This is my wireless config, I have no problem at all, for months.
wlan1 are for the Office Rooms,
VirtualAP 1 & 2 are for Laboratory: VAP1 for the old devices with not recognize wpa2, VAP2 for the devices which can recognize only WPA2-AES like Windows 8 & 8.1.

This is the export

/interface wireless security-profiles
add authentication-types=wpa-psk,wpa2-psk group-ciphers=tkip,aes-ccm group-key-update=4m mode=dynamic-keys name=Office supplicant-identity=MikroTik unicast-ciphers=tkip,aes-ccm wpa-pre-shared-key=Xxxxxxx.0 wpa2-pre-shared-key=Xxxxxxx.0
add authentication-types=wpa-psk group-ciphers=tkip mode=dynamic-keys name="Lab TKIP" supplicant-identity=MikroTik unicast-ciphers=tkip wpa-pre-shared-key=Xxxxxxxxxxx00 wpa2-pre-shared-key=Xxxxxxxxxxx00
add authentication-types=wpa2-psk mode=dynamic-keys name="Lab AES" supplicant-identity=MikroTik wpa-pre-shared-key=Xxxxxxxxxxx00 wpa2-pre-shared-key=Xxxxxxxxxxx00
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-b/g wireless-protocol=802.11 bridge-mode=disabled comment=Office country=italy disabled=no max-station-count=14 mode=ap-bridge radio-name="Office" security-profile=Office ssid=AP-OFFICE
add comment=Lab disabled=no mac-address=02:0C:42:D8:04:40 master-interface=wlan1 max-station-count=14 name=wlan1-vap1 security-profile="Lab TKIP" ssid=AP-LAB-TKIP
add comment=Lab disabled=no mac-address=12:0C:42:D8:04:40 master-interface=wlan1 max-station-count=14 name=wlan1-vap2 security-profile="Lab AES" ssid=AP-LAB-AES

This setting are not exported because I leave it with default value:

adaptive-noise-immunity=none
antenna-gain=0
channel-width=20mhz
compression=no
distance=dynamic
frequency-mode=manual-txpower
hw-protection-mode=none
hw-retries=7
preamble-mode=both
rate-selection=advanced
rate-set=default
scan-list=default
tx-power-mode=default
wds-mode=disabled
wmm-support=disabled

Notice: I masquerade letters with x, capitals with X and numbers with 0.

Remember to use all capitals letters and no space or “_” or other, use only A-Z 0-9 and “-” characters for ssid.

Why? Some Apple toys and some other devices, do not work if on the ssid are small letters or other symbols than “-”.
This problem are also tested on TP-Link, Netgear, D-Link, Ubiquity, etc.

On Mac Book Pro booted with Snow Leopard or Lion, do this problem, but booted with windows 8.1 never have one single problem on wifi (but not work some others computer parts… but this is OT…)

7

If you want use other device than MikroTik to connect to AP, set this value:


/interface wireless
set [ find default-name=wlan1 ] adaptive-noise-immunity=none frequency-mode=manual-txpower preamble-mode=both rate-set=default wds-default-bridge=none

8

I don’t have any tipe of alarm in my house. And i live in a country house without noise (i the only WiFi in a few blocks)

Enviado desde mi XT925 usando Tapatalk 2