good link, but packet loss, why?

RouterOS Wireless Networking
1

I have two 532’s bridged (WDS) on a 5 mile P2P link. 2ft parabol antennas, 3ft LMR400 cable from antenna to radio. clear LOS.

the link seems perfect. when I do a “registration-table print stats” I get;

[admin@MikroTik] interface wireless> registration-table print stats
0 interface=wlan1 radio-name=“00156D5009AC” mac-address=00:15:6D:50:09:AC
ap=yes wds=yes rx-rate=48Mbps tx-rate=36Mbps packets=7302189,6776482
bytes=3823635454,1209357832 frames=7302189,6792006
frame-bytes=3779914084,1168891635 hw-frames=9017050,6792006
hw-frame-bytes=738353947,1331899779 uptime=21h47m5s last-activity=50ms
signal-strength=-50dBm@36Mbps signal-to-noise=48dB
strength-at-rates=-50dBm@6Mbps 1s230ms,-49dBm@9Mbps 11m24s200ms,-
49dBm@12Mbps 6m13s290ms,-50dBm@18Mbps 1m40s880ms,-
49dBm@24Mbps 1m15s160ms,-50dBm@36Mbps 990ms,-50dBm@48Mbps
80ms,-49dBm@54Mbps 1s310ms
tx-signal-strength=-50dBm tx-ccq=77% rx-ccq=88% p-throughput=25557
ack-timeout=60 distance=60 nstreme=no framing-mode=none
routeros-version=“2.9.23” last-ip=10.254.254.239 802.1x-port-enabled=yes
authentication-type=none encryption=none compression=no


And “monitor”;


[admin@MikroTik] interface wireless> monitor
numbers: wlan1
status: connected-to-ess
band: 5ghz
frequency: 5300MHz
tx-rate: 48Mbps
rx-rate: 36Mbps
ssid: “NETstar”
bssid: 00:15:6D:50:09:AC
radio-name: “00156D5009AC”
signal-strength: -49dBm
tx-signal-strength: -53dBm
noise-floor: -98dBm
signal-to-noise: 49dB
tx-ccq: 77%
rx-ccq: 88%
p-throughput: 24981
current-ack-timeout: 60
current-distance: 60
wds-link: yes
nstreme: no
framing-mode: none
routeros-version: “2.9.23”
last-ip: 10.254.254.239
802.1x-port-enabled: yes
authentication-type: none


Sorry I’m new to this, but I think these values indicate a “good” link, correct?

Or are my signal-to-noise and/or my CCQ values not what they should be?

And yet when I do a continues ping over this link I get about 20% or more packet loss from time to time.

Any idea why?

2

have done a little more experimenting; I saw that the power-rates were jumping between 36, 48, and 54Mbps. and therefore I changed the supported-rates to only support 6,9,12,18,24Mbps. and set basic-rate to 24mbps. Now both radios lock in at 24mbps continues. But i still have the same problem;
With the bandwidth-test I don’t get more than around 5Mbps. and I see 20 to 50% packet loss.

any one any suggestions?

3

problem solved, sort of.
one of the two 532’s showed dropped packets, up to 50%, when pinging to it’s ethernet port. we changed from POE to directly powered and now pings are 100%. I really don’t understand why. the other 532 is still POE and working fine. cables and connections were checked and tested fine.
anyhow, now we have a working link, almost 20Mbps on a 5mile link, verry happy.