I'm running Voyage 0.2 on a WRAP with one CM9 as the 5GHz backhaul and
an Engenius 2611 as the wlan0 AP for customers.
The nine clients are mostly Engenius CB3s (one SmartBridge outdoor) at
1.5-3.0 miles using a variety of antennas (typically PacWireless 16db
Yagis or 15/19db grid) as required by the client site. All of them have
excellent signal strengths (as reported by the CB3 web interface and
also as compared to other AP/clients elsewhere in my system).
In general, the CB3s will associate and work well at reported "Quality"
values of anything in the high 40s% and up but on this particular AP,
they take an inordinately long time to associate (if at all) at quality
values below about 70% and sometimes may take hours before finally
linking. Once associated, the link works well with data rates pushing 4
mbs download. I'm using a PacWireless 13db horizontal omni connected to
the AP radio with about 6' of LMR400. The cable has been replaced once
with no noticeable improvement.
hh1:/usr/local/bin# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: 00:02:6F:41:FC:8C
Mode:Managed
Quality=34/70 Signal level=-66 dBm Noise level=-90 dBm
Cell 02 - Address: 00:02:6F:41:FB:88
Mode:Managed
Quality=34/70 Signal level=-65 dBm Noise level=-89 dBm
Cell 03 - Address: 00:02:6F:41:FB:89
Mode:Managed
Quality=37/70 Signal level=-64 dBm Noise level=-90 dBm
Cell 04 - Address: 00:30:1A:02:12:BC
Mode:Managed
Quality=33/70 Signal level=-66 dBm Noise level=-89 dBm
Cell 05 - Address: 00:02:6F:37:BA:9F
Mode:Managed
Quality=34/70 Signal level=-65 dBm Noise level=-89 dBm
Cell 06 - Address: 00:02:6F:45:82:88
Mode:Managed
Quality=35/70 Signal level=-64 dBm Noise level=-89 dBm
Cell 07 - Address: 00:02:6F:41:FC:A6
Mode:Managed
Quality=37/70 Signal level=-64 dBm Noise level=-90 dBm
Cell 08 - Address: 00:02:6F:43:0A:84
Mode:Managed
Quality=37/70 Signal level=-63 dBm Noise level=-89 dBm
Cell 09 - Address: 00:02:6F:41:FE:1D
Mode:Managed
Quality=40/70 Signal level=-61 dBm Noise level=-89 dBm
wlan0 IEEE 802.11b ESSID:"nrvu-hh1"
Mode:Master Frequency:2.447 GHz Access Point: 00:02:6F:42:BC:AA
Bit Rate:11 Mb/s Tx-Power=23 dBm Sensitivity=1/3
Retry min limit:8 RTS thr:off Fragment thr:off
Encryption key:XXXXXXXXXXXXXXXXXXXXXX Security mode:restricted
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:396511 Rx invalid frag:0
Tx excessive retries:860573 Invalid misc:58515241 Missed
beacon:0
I've got potential customers in locations that should connect easily but
site survey tests have been disappointing. Any suggestions on what may
be happening here are greatly appreciated.
Note that this site is almost identical to many others where signal
strengths are sometimes significantly lower (many in the mid to upper
-70db range as reported at the AP by iwlist wlanX scan) than those above
and yet the clients associate at those sites immediately and work well.
Thanks,
Edwin
--
<=+=+=+==+=+=+==+=+=+=+=+=+=+=+=>
Edwin Whitelaw, P.E.
New River Valley Unwired, LLC
2200 Lonesome Dove Dr
Christiansburg, VA 24073
540-239-0318
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