2 RBSXTG-5HPacD at 400 meters Line of Sight

RouterOS Wireless Networking
1

Hi,

I’m trying to get the best speed out of my new RBSXTG-5HPacD but it is still not working.
Before I had 2 Sextants at the same place where I now have RBSXTG-5HPacD
With the sextants I allwasy have a stable speed of 300Mbps wireless.
But with the RBSXTG-5HPacD the speed is verry unstable. It is going up and down.
I try different settings but still no good result.

Can someone give me some good tips?

I use these devices to bridge two buildings.

This are the settings:
1)
[admin@Ring 393 Bridge SXT-G-5HPacD] /interface wireless> export

oct/17/2014 14:42:49 by RouterOS 6.18

software id = P3MK-1QNB

/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa2-psk eap-methods=“” management-protection=
allowed mode=dynamic-keys name=Bridge supplicant-identity=“”
wpa2-pre-shared-key=“!SECRET”
/interface wireless
set [ find default-name=wlan1 ] ampdu-priorities=0,1,2,3,4,5,6,7 band=
5ghz-onlyac channel-width=20/40mhz-eC disabled=no frequency=5180
guard-interval=long l2mtu=1600 mode=bridge security-profile=Bridge ssid=
BRIDGE tx-power=30 tx-power-mode=all-rates-fixed wireless-protocol=nv2

oct/17/2014 14:45:16 by RouterOS 6.18

software id = ZQNC-1N96

/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa2-psk eap-methods=“” management-protection=
mode=dynamic-keys name=Bridge supplicant-identity=“” wpa2-pre-share
“SECRET”
/interface wireless
set [ find default-name=wlan1 ] ampdu-priorities=0,1,2,3,4,5,6,7 band=
5ghz-onlyac channel-width=20/40mhz-eC disabled=no frequency=5180
guard-interval=long l2mtu=1600 mode=station-bridge security-profile
ssid=BRIDGE tdma-period-size=auto tx-power=30 tx-power-mode=all-rat
wmm-support=enabled

2

Does nobody have any suggestion?
The TX / RX Signal is good I think. 44 / 46

3

Try with 20 Mhz bandwidth and eCee

4

Try this setting as well.
Still it is not stable and allso no high speed as well.

5

What is the speed?
What is the signal?

6

Hi this are some signal values:

Tx/Rx Signal Strength: -42/-43 dBm
Tx/Rx Signal Strength Ch0: -42/-43 dBm
Tx/Rx Signal Strength Ch1: -63/-63 dBm
Noice Floor: -103 dBm
Signal To Noise: 61 dB
Tx/Rx CCQ: 84/90 %

RouterOSVersion 6.20

The TX rate and Rx rate are not stabel and are between the 24 and 375 Mbps

When I had two Sextants the Tx and Rx rate are constantly 300 Mbps

When I now copy large files from one side to the other I see a speed of 5MBps and think it is not fast.
With the Sextants I had a speed of 13 MB/ps when I copy large files

7

Try with this configuration please

FOR accesspoint

/interface bridge
add mtu=1500 name=bridge1
/interface wireless
set [ find default-name=wlan1 ] antenna-gain=0 band=5ghz-onlyac
channel-width=20/40mhz-Ce country=belgium disabled=no frequency=5500
guard-interval=long l2mtu=1600 max-station-count=6 mode=bridge
nv2-cell-radius=10 nv2-preshared-key=978a6bv3986aav67867768ae
nv2-security=enabled radio-name=“PTP F-M” rate-set=configured ssid=
PTP-FMF tx-power=8 tx-power-mode=all-rates-fixed wds-default-bridge=
bridge1 wds-mode=dynamic-mesh wireless-protocol=nv2
/interface wireless nstreme
set wlan1 enable-nstreme=yes
/system logging action
set 1 disk-file-name=log
set 2 remember=yes
set 3 src-address=0.0.0.0
/interface bridge port
add bridge=bridge1 interface=ether1
/ip dhcp-client
add default-route-distance=0 dhcp-options=hostname,clientid disabled=no
interface=bridge1
/ip dns
set servers=8.8.8.8
/ip firewall service-port
set ftp disabled=yes
set tftp disabled=yes
set irc disabled=yes
set h323 disabled=yes
set sip disabled=yes
set pptp disabled=yes
/ip ipsec policy
set (unknown) dst-address=0.0.0.0/0 src-address=0.0.0.0/0
/ip service
set telnet disabled=yes
set ftp disabled=yes
set ssh disabled=yes
set api disabled=yes
set api-ssl disabled=yes
/ip upnp
set allow-disable-external-interface=no
/snmp
set trap-community=public
/system leds
set 0 interface=wlan1
/system routerboard settings
set cpu-frequency=720MHz
/tool user-manager database
set db-path=web-proxy1



For station

/interface bridge
add l2mtu=1600 name=bridge1
/interface wireless
set [ find default-name=wlan1 ] band=5ghz-onlyac channel-width=20/40mhz-Ce
country=belgium disabled=no frequency=5500 guard-interval=long l2mtu=1600
mode=station-wds nv2-preshared-key=978a6bv3986aav67867768ae nv2-security=
enabled radio-name=“PTP M-F” ssid=PTP-FMF tx-power=8 tx-power-mode=
all-rates-fixed
/interface wireless nstreme
set wlan1 enable-nstreme=yes
/interface bridge port
add bridge=bridge1 interface=wlan1
add bridge=bridge1 interface=ether1
/ip dhcp-client
add default-route-distance=0 dhcp-options=hostname,clientid disabled=no
interface=bridge1
/ip dns
set servers=8.8.8.8
/ip firewall service-port
set ftp disabled=yes
set tftp disabled=yes
set irc disabled=yes
set h323 disabled=yes
set sip disabled=yes
set pptp disabled=yes
/ip service
set telnet disabled=yes
set ftp disabled=yes
set ssh disabled=yes
set api disabled=yes
set api-ssl disabled=yes
/ip upnp
set allow-disable-external-interface=no
/system leds
set 0 interface=wlan1
/system routerboard settings
set cpu-frequency=720MHz


CAUTION the country settings are configured for Belgium
You must edit country settings
Let me know of this is better

8

Hi, Thanks,
I hope to do this tonight.
I let you know.

9

please upgrade the RouterOS to this test release:
http://www.mikrotik.com/download/share/routeros-mipsbe-6latest.npk

Then reset the wireless configuration and use the default values and change only the band,channel-width,ssid and the frequency.
Then check what signal you have when you use the same wireless frequency and channel-width that you had on the Sextant units.
Are you sure that you have clear line of sight and good Fresnel zone as the chain1 signal is by 20db lower than chain0?

10

Thanks for your commend.
Yes I have sure a free line of sight.
But about the freshnel zone I’m not sure.

Both antenna’s are at 8 Meters above the ground
The distance between the two antenna’s is about 300 meters
In between the antannas there are shelters but not to high.
I think about 3 meters.

11

This is not the problem on this distance

12



I make a reset to the wireless interface and used the above configuration. and use the frequency that is suitable for my location.
the rx rate is around 1Mbps.

the distance is less than 700 meters. I’m using RBSXTG-5HPacD which I’m still unable to get a speed higher than 90 Mbps.

what can be done the get out the most of it.

13

Have you a perfect line of sight?

Have you interference from other accesspoints?

Try with another frequency (channel)

Try with 802.11 protocol as experiment

14

Update both devices to 6.21.rc22
No change in the netwerk.
Still the same instable situation.