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vladimirslk
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NV2 jitter issue (1%loss)

Sun Jan 01, 2012 10:11 pm

2x 433AH both sides
52hN MIMO 2x2 + 2xdishes 28dbi v+h both sides
1km~



config the same both sides

mode=station-wds
country=no_country_set antenna-gain=0 frequency=5200 band=5ghz-onlyn
channel-width=20/40mhz-ht-above scan-list=default
wireless-protocol=nv2-nstreme rate-set=default
supported-rates-b=1Mbps,2Mbps,5.5Mbps,11Mbps
supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,
54Mbps
basic-rates-b=1Mbps basic-rates-a/g=6Mbps max-station-count=2007
distance=dynamic tx-power-mode=default noise-floor-threshold=default
nv2-noise-floor-offset=default periodic-calibration=default
periodic-calibration-interval=60 dfs-mode=none wds-mode=dynamic
wds-default-bridge=RM-televork wds-default-cost=100
wds-cost-range=50-150 wds-ignore-ssid=no update-stats-interval=disabled
bridge-mode=enabled default-authentication=yes default-forwarding=yes
default-ap-tx-limit=0 default-client-tx-limit=0
proprietary-extensions=post-2.9.25 wmm-support=disabled hide-ssid=no
security-profile=uplink disconnect-timeout=3s on-fail-retry-time=100ms
preamble-mode=both compression=no allow-sharedkey=no
station-bridge-clone-mac=00:00:00:00:00:00
ht-ampdu-priorities=0,1,2,3,4,5,6,7 ht-guard-interval=any
ht-supported-mcs=mcs-0,mcs-1,mcs-2,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
ht-basic-mcs=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7
ht-txchains=0,1 ht-rxchains=0,1 ht-amsdu-limit=8192
ht-amsdu-threshold=8192 tdma-period-size=2 nv2-queue-count=2
nv2-qos=default nv2-cell-radius=30 nv2-security=disabled
nv2-preshared-key="" hw-retries=8 frame-lifetime=0
adaptive-noise-immunity=none hw-fragmentation-threshold=disabled
hw-protection-mode=none hw-protection-threshold=0
frequency-offset=-2200 rate-selection=legacy


status: connected-to-ess
band: 5ghz-n
frequency: 5200MHz
wireless-protocol: nv2
tx-rate: 300.0Mbps
rx-rate: 300.0Mbps
ssid:
bssid: 00:21:A4:35:00:E6
radio-name: 0021A43500E6
signal-strength: -32dBm
signal-strength-ch0: -33dBm
signal-strength-ch1: -46dBm
tx-signal-strength: -20dBm
tx-signal-strength-ch0: -24dBm
tx-signal-strength-ch1: -26dBm
noise-floor: -108dBm
signal-to-noise: 76dB
tx-ccq: 95%
rx-ccq: 99%
authenticated-clients: 1
current-distance: 1
wds-link: yes
bridge: no

Sometimes jitter comes from 100-800ms, could be interval ~1minute..
What could be more tweaked for P2P link?

p.s. about power levels, with low levels it does not connect on 300/300.
-45-55 lets say (power rate set to 5) @moment on default (card rates)
 
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tgrand
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Re: NV2 jitter issue (1%loss)

Mon Jan 02, 2012 4:27 am

Try changing tx-power to - card rates 5db.
Do this at both ends and retest.
 
KillerOPS
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Re: NV2 jitter issue (1%loss)

Sat Jan 21, 2012 8:35 pm

try to use mpls instead of wds, and if this doesn't work disable one chain.
 
vladimirslk
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Re: NV2 jitter issue (1%loss)

Tue Jan 24, 2012 10:16 pm

i gave up with it :) just installing fiber in mart/aprill
reducing power will give something like 160/120mbps in link connection, stability @same level..

mpls is a way to try, but i think on that link is not possible, it's backbone to ISP...
 
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karina
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Location: Spain

Re: NV2 jitter issue (1%loss)

Mon Feb 27, 2012 12:26 am

imho just way to much power / antenna gain. A couple of sxt,s would more than do this 1km link
 
0ldman
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Re: NV2 jitter issue (1%loss)

Mon Feb 27, 2012 6:28 am

-20 and -30's is overdriving the receiver. It is going to lose packets. If you can't get 300/300 with a -50 signal then you don't have a clean channel, which is probably contributing to losing packets.
 
sup5
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Re: NV2 jitter issue (1%loss)

Mon Feb 27, 2012 8:18 am

- use station-bridge instead of station-wds
- disable all QAM64 HT-MCS and 48/54Mbps
- use adaptive noise immunity
- look for a clean channel (maybe the band above 5.7 GHz)

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