RouterBOARD SXT 5HnD ptp bridge mode only passing 40megs tcp

RouterOS Wireless Networking
1

I just got the new RouterBOARD SXT 5HnD in hand. I have 2 setup on the bench and connected via bridge mode.

I can seem to get more than 40megs of tcp traffic
I get about 100megs of UPD traffic,

Is there something I need to set to get 200megs of real throughput?

Flags: X - disabled, R - running
0 R name=“wlan1” mtu=1500 mac-address=00:0C:42:84:62:7F arp=enabled
interface-type=Atheros 11N mode=station ssid=“MikroTik” frequency=5765
band=5ghz-onlyn channel-width=20mhz scan-list=default
wireless-protocol=nv2 wds-mode=disabled wds-default-bridge=none
wds-ignore-ssid=no default-authentication=yes default-forwarding=yes
default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=default compression=no
[admin@MikroTik] /interface wireless nstreme> print
0 name=“wlan1” enable-nstreme=yes enable-polling=yes disable-csma=yes framer-policy=dynamic-size framer-limit=3200

2

you didn’t explain how you made those tests - from where to where you were sending traffic, what bandwidth generator you used? Please post wireless registration details.

3

Sorry, I was doing a test between 2 SXT5HnD board in bridge mode. I had them separated enough to have good signal but not too much. The test was using the b/w test in the MK.

here is the wireless reg stats
0 interface=wlan1 radio-name=“000C4284627F” mac-address=00:0C:42:84:62:7F ap=no wds=no rx-rate=“117.0Mbps” tx-rate=“117.0Mbps”
packets=82856428,449977 bytes=611389557,501790444 frames=41605395,283510 frame-bytes=1350567321,504004870 hw-frames=42094631,303096
hw-frame-bytes=3783053740,514951609 tx-frames-timed-out=0 uptime=13h25m1s last-activity=150ms signal-strength=-64dBm@HT20-6
signal-to-noise=50dB signal-strength-ch0=-68dBm signal-strength-ch1=-66dBm
strength-at-rates=-58dBm@6Mbps 4s910ms,-58dBm@9Mbps 13h25m,-58dBm@12Mbps 13h24m56s,-59dBm@18Mbps 13h24m52s,-58dBm@24Mbps 13h24m48s,-
60dBm@36Mbps 13h24m47s530ms,-61dBm@48Mbps 13h24m45s990ms,-62dBm@54Mbps 13h24m40s650ms,-59dBm@HT20-4 13h24m34s,-61dBm@HT20-5
10h11m33s850ms,-64dBm@HT20-6 150ms,-66dBm@HT20-7 3s140ms
tx-signal-strength=-62dBm tx-ccq=92% rx-ccq=84% p-throughput=90584 distance=1 nstreme=no framing-mode=none routeros-version=“4.14”
last-ip=192.168.251.2 802.1x-port-enabled=yes compression=no wmm-enabled=yes

4

with internal btest is normal 40mbp; you need to have two x86 computers connected to each end.

5

Can you give the settings you used to put the two SXTs in bridge with each other? Thanks!

6

another thing update your NIC driver to the lastest try to not use the windows buildin driver (if you use windows) I guess for the btest.exe

7

i need to know what is the maximum transfer of tcp data between 2 end-nodes such these topology:


PC ------------Wireless-SXT-Client --------------------WirelessAP–SXT------------PC

From PC to PC,
do SXT able to transfer max 100Mbps real throughput ?

8

Same as my measures. I set up a bridge by this howto: http://wiki.mikrotik.com/wiki/Transparently_Bridge_two_Networks_using_MPLS
After that switch on the second chain and chose nv2 wireless protocol, 5ghz-a/n.

The devices distance about 100m. With the built in bandwith test tool 100 mbit/sec one direction UDP, 54 mbit/sec both direction UDP. 54 mbit/sec one direction TCP, 25-30 mbit/sec both direction TCP. Tx/Rx CCQ is about 98-100% so the link quality is ok.
The real full duplex UDP is a dream I think. On TCP test the processor usage was 100%.

Advices:

  • try different spektrum, in my situation the default spectrum was so dirty
  • nv2 protocol can give you some gain
  • try nv2 TDMA change to xxx (I use 5 - better throughput and minimal increased latency)
  • use short preamble
9

Don’t run the bandwidth test on the SXT or you will not see the maximum throughput that it is capable of. If the CPU on the SXT is busy than you cannot expect it to have enough time for 802.11n protocol.

For a more accurate bandwidth test, you must plug another device into the SXT on each end and run the bandwidth test on those.

Also, why not set the radio mode to 5GHz-only-N? For maximum speed, you don’t use 802.11a.

Tom

10

I will test the bandwidth with PC-s and report.
I need 5Ghz frequency because the 2.4 GHz spectrum is really dirty in the heart of the city.

11

Same speed with PC-s at the end (file copy)…

12

Got 120 Mbps (Tcp) download & 52 mbps (Tcp) upload on SXT 5hnd.
Configured it using this link http://wiki.mikrotik.com/wiki/Transparently_Bridge_two_Networks_using_MPLS
getting this result by keeping the devices 5 meters away from each other.
Will be testing the device on an outdoor link of 7.5 KM next week.
thanks

13

Interested in your long haul results

14

I am also interested…

15

166mbps at 2km; TCP
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16

How did your long distance tests work out?

17




Have you tested it ? Im interesed to connect it to a distance of max 6 km ..and I wonder if it works ???

18

I cant seem to get above 36mb on my link at .5km. Getting support for these products is like pulling teeth…

19

At 5.17 KM the link is giving a signal strength of -81/-83 with both the channels enabled
& tx/rx ccq remains 36/12
:frowning: :confused: literally pulling my hair as to why this is not working at all

20

have you emailed support? this forum is not a support forum