Aloha,
"21:91 : Quality=16/94 Signal level=-68 dBm Noise level=-84 dBm "
May I suggest noise of 11db on ch161 + signal of 16db = 27db or -68dbm
'Signal Level'? and the noise isn't included/excluded in the other commands.
I take all these readings with a grain of salt, since they're
averaged/weighted over time. Scan's often seem to show peak signal
level rather than average, and often persist long after the signal is
gone; (with my older version madwifi)
Once I have a connection, i use wlanconfig ath0 list to peak the antenna.
When I see the link in wlanconfig ath0 list, but have no throughput, it
seems to indicate that the s/n is not sufficient on the far end, usually
due to noise/interference.
If ld-tr6 is not local, you may wish to associate with it, and verify
your erp from local. Also, if ld-tr6 is not local, the high rx level
and high directivity of your antenna suggests that you're pointed pretty
much directly at it?
Hope this helps;
bob
Edwin Whitelaw wrote:
I'm working on an 18.5 mi link using 2 WRAPs with the Ubiquiti 600mw
cards. Obviously, antenna aiming is critical and difficult so the RSSI
is an important tool to get things working.
Note the RSSI/SN for "ld-peak" as reported by the different commands run
on the managed end.
--------------
ld-peak:~# wlanconfig ath0 list
ADDR AID CHAN RATE RSSI DBM IDLE TXSEQ RXSEQ CAPS ACAPS
ERP STATE MODE
00:15:6d:63:21:91 0 161 6M 16 -79 0 11866 29024 Es
F 0 0 Normal WME ATH
ld-peak:~# wlanconfig ath0 list scan
SSID BSSID CHAN RATE S:N INT CAPS
ld-tr6 00:60:b3:c5:ca:3d 64 54M 50:0 100 EP
ld-heritage 00:0b:6b:4e:29:a5 36 54M 42:0 100 EPs WME ATH
ld-buffalo 00:0b:6b:4e:2a:25 40 54M 33:0 100 EPs WME ATH
ld-schaeffer 00:0b:6b:36:ba:e9 44 54M 41:0 100 EPs WME ATH
ld-reilly 00:0b:6b:4e:2a:52 149 54M 32:0 100 EPs WME ATH
ld-peak 00:15:6d:63:21:91 161 54M 16:0 100 Es WME ATH
ld-peak:~# iwconfig ath0
ath0 IEEE 802.11a ESSID:"ld-peak" Nickname:""
Mode:Managed Frequency:5.805 GHz Access Point: Not-Associated
Bit Rate:6 Mb/s Tx-Power:16 dBm Sensitivity=0/3
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=16/94 Signal level=-68 dBm Noise level=-84 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
ld-peak:~# iwspy ath0 00:15:6d:63:21:91
ld-peak:~# iwspy ath0
ath0 Statistics collected:
00:15:6D:63:21:91 : Quality=16/94 Signal level=-68 dBm Noise
level=-84 dBm
Link/Cell/AP : Quality=15/94 Signal level=-69 dBm Noise
level=-84 dBm
Typical/Reference : Quality:0 Signal level:0 Noise level:0
-----------
Any comments on understanding why wlanconfig reports only -79db while
iwconfig and iwspy report a lovely -68db? If it really is -68db, I
would expect association at excellent bit rates that's not happening.
Also, as indicated from iwconfig, the link does not associate. I do
have athctrl set correctly for the distance.
----/etc/network/interfaces---
auto ath0
iface ath0 inet static
address 10.100.1.1
netmask 255.255.255.0
broadcast 10.100.1.255
madwifi-base wifi0
wireless-mode Managed
wireless-essid ld-peak
wireless-channel 161
up athctrl -i wifi0 -d 29600
down wlanconfig ath0 destroy
---------------
Thanks,
Edwin
PS. Anyone heard of the new ALIX boards for sale in the US, yet?
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