rb2011uas-2hnd-in access point problem

RouterOS Wireless Networking
1

Hello,
i just purchased a rb2011uas-2hnd-in unit to be used as an indoor access point. Everything is working fine but i get a very low bitrate on the wlan interface. When the unit start or i change a configuration an this interface is restarded a get a burst performance and then nothing more tha 2-300 kbs of traffic.
I've tried resetting the unit and starting from scratch but i get the same result. i have 8 to 10 device connected most of them are smartphones and tablets.
here my configuration:

jan/02/1970 00:37:58 by RouterOS 5.20

software id = M4FX-MTNX

/interface bridge
add l2mtu=1598 name=bridge1 protocol-mode=rstp
/interface ethernet
set 6 name=ether6-master
set 7 master-port=ether6-master name=ether7-slave
set 8 master-port=ether6-master name=ether8-slave
set 9 master-port=ether6-master name=ether9-slave
set 10 master-port=ether6-master name=ether10-slave
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa-psk,wpa2-psk eap-methods=passthrough
management-protection=allowed mode=dynamic-keys name=profile1
supplicant-identity="" wpa-pre-shared-key=*********
wpa2-pre-shared-key=***********
/interface wireless
set 0 band=2ghz-b/g/n channel-width=20/40mhz-ht-above country=italy disabled=
no distance=indoors ht-rxchains=0,1 ht-txchains=0,1 l2mtu=2290 mode=
ap-bridge security-profile=profile1 ssid=WIFI wireless-protocol=any
/ip dhcp-server
add interface=bridge1 name=dhcp1
/ip hotspot user profile
set [ find default=yes ] idle-timeout=none keepalive-timeout=2m
/interface bridge port
add bridge=bridge1 interface=ether3
add bridge=bridge1 interface=wlan1
add bridge=bridge1 interface=ether1
add bridge=bridge1 interface=ether2
add bridge=bridge1 interface=ether4
add bridge=bridge1 interface=ether5
add bridge=bridge1 interface=ether6-master
/interface wireless access-list
add interface=wlan1 mac-address=5C:0A:5B:AA:11:CF
/interface wireless connect-list
add interface=wlan1 mac-address=5C:0A:5B:AA:11:CF security-profile=profile1
/ip address
add address=192.168.1.246/24 interface=bridge1
/ip dns
set servers=192.168.1.8,192.168.1.67
/ip neighbor discovery
set wlan1 disabled=yes
/ip route
add distance=1 gateway=192.168.1.1
add distance=1 dst-address=10.10.0.0/16 gateway=192.168.1.245
add distance=1 dst-address=192.168.0.0/24 gateway=192.168.1.245
/system identity
set name="WIFI"




any suggestion??

thanks in advance

2

What is your signal strength in /interface wireless registration? Are you in a crowded wifi area? What are you using to test your speed?

3

All channels are free, i have tried to use them all and there is no other network around.
Signals can vary from -50 or less to -80 depends on location but even if i sit right next to the access point nothing changes.
Funny things is that when you restart this interface it performs well for few seconds.
I look at traffic section in /inteface/wireless but i can see poor performance just using these devices.

And by the way i get much better performances in upload than download, which is pretty strange.

4

How is the connection if you are wired?

5

Using another access point in the same wired network i get 8 mb download (with just one client). Wired ports are ok, i’ve run winbox bandwidth test against a remote router and i get full speed.
It seems something wrong in the wlan part but can’t figure out what it is.
it’s performing just few seconds after restarting this interface and then it drops

6

please make a support output file when you see that bad performance and send that file to support@mikrotik.com
What are the antenna position of the board?

7

Just sent the supout.rif (see Ticket#2012100566000737).
This router is ontop of a desk and both antenna position is vertical

8

No more suggestions or same problems to anybody else?

9

Was there any solution to this? I have the same probem, can`t get over ~ 28Mbit/s.

10

Hi I have similar problem,

when I make any changes on wifi adapter the speed increases till ~ 20-30Mb but after few hours drops back to 4-6Mb. It looks like if wifi adapter is restarted it can holds bigger speed for limited times and then drops.
Any idea what wrong? Because on wired interfaces the speed is OK.

KR,

sfikr

11

I’ve partially solved this by changing the wlan1 interface queue from wireless-default to only-hardware-queue.
This is not the final solution but it partially fixed this issue.
Someone should explain me why we are getting this behaviour

12

have you tried the suggestions from the last email? as the boardcast/multicast traffic is received from your network as you
have bridged the ethernet to wireless and that uses all the wireless media as it sends using the lowest available basic-rate.

13

Hey Uldis

I assume you are refering to an email sent to the OP but could you share the recomendation so we can all try?

14

Are you also having problem with wifi using RB2011? FabFab10 user had bridged wireless with ethernet and in the ethernet network there was a lot of broadcast/multicast traffic and that is also forwarded to wireless. So for those packets the lowest basic rate will be used. Here is more info on multicast traffic and wireless:
http://wiki.mikrotik.com/wiki/Multicast_detailed_example#Multicast_and_Wireless

And here are the info what are the default basic-rates for each band:
http://wiki.mikrotik.com/wiki/Manual:Interface/Wireless#Basic_and_MCS_Rate_table

You can always customize the basic-rates but keep in mind if you use higher basic-rate that rate should be reliable as that rate is used for all the wireless management frames.

15

No particular problem, but lets face it, WDS Mesh and HWMP Mesh all suffer from various Loop issues (some not fixed in 5.18) so its always good to have all the ideas to optimise a wireless network for best results.

Thanks for taking the time to reply.