[Madwifi-users] iwlist can shows good, iwconfig no connection

[Edwin W. <Edw...@nr...>]

We're setting up a two hop backhaul with three WRAP boards running 
voyage 0.2 using CM9 miniPCI cards.  Installed the midpoint radio 
yesterday (130' up on a water tower) with each antenna aimed back to its 
respective endpoint.  All the equipment was setup in a warehouse and 
tested successfully for configuration and throughput prior to the 
install.  Except for the distances,. link1 is 4.6 mi and link 2 is 3.9 
mi., nothing has changed.  However, even though iwlist scan shows I'm 
getting -84db on link 2, iwconfig ath0 shows no link (see below).  The 
midpoint system has both interfaces set to Master mode and both 
endpoints have enough signal to correctly show the MAC address and 
frequency, etc from iwlist scan.   I am not yet running athctrl -d 
<distance> on the Master interfaces.  Would this alone cause a failure 
to associate?

All three WRAP boxes are essentially identical.  Typical config info below:

ath_hal: 0.9.14.9 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413)
wlan: 0.8.6.0 (EXPERIMENTAL)
ath_rate_onoe: 1.0
ath_pci: 0.9.6.0 (EXPERIMENTAL)
Build date: Aug 23 2005
Debugging version (IEEE80211)
ath0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 
24Mbps 36Mbps 48Mbps 54Mbps
ath0: turboA rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: turboG rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: H/W encryption support: WEP AES AES_CCM TKIP
ath0: mac 5.9 phy 4.3 radio 3.6
ath0: Use hw queue 1 for WME_AC_BE traffic
ath0: Use hw queue 0 for WME_AC_BK traffic
ath0: Use hw queue 2 for WME_AC_VI traffic
ath0: Use hw queue 3 for WME_AC_VO traffic
ath0: Use hw queue 8 for CAB traffic
ath0: Use hw queue 9 for beacons
Debugging version (ATH)
ath0: Atheros 5212: mem=0x80000000, irq=12

nrvu:/var/tmp# iwlist ath0 scan
ath0      Scan completed :
          Cell 01 - Address: 00:0B:6B:35:C0:4D
                    ESSID:"hub-nrvu"
                    Mode:Master
                    Frequency:5.76 GHz (Channel 152)
                    Quality=10/94  Signal level=-85 dBm  Noise level=-95 dBm
                    Encryption key:off
                    Bit Rate:6 Mb/s
                    Bit Rate:9 Mb/s
                    Bit Rate:12 Mb/s
                    Bit Rate:18 Mb/s
                    Bit Rate:24 Mb/s
                    Bit Rate:36 Mb/s
                    Bit Rate:48 Mb/s
                    Bit Rate:54 Mb/s
                    Extra:bcn_int=100


nrvu:/var/tmp# iwconfig ath0
ath0      IEEE 802.11a  ESSID:"hub-nrvu"
          Mode:Managed  Frequency:5.76 GHz  Access Point: 00:0B:6B:35:C0:4D
          Bit Rate:6 Mb/s   Tx-Power:18 dBm   Sensitivity=0/3
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/94  Signal level=-95 dBm  Noise level=-95 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:936  Invalid misc:936   Missed beacon:0

nrvu:/var/tmp# athstats
48      mib interrupts
1892    tx management frames
508     tx frames discarded prior to association
943     tx failed 'cuz too many retries
10383   long on-chip tx retries
943     tx frames with no ack marked
9       rx failed 'cuz of bad CRC
rssi of last ack: 10
rssi of last rcv: 10
1       switched default/rx antenna
Antenna profile:
[1] tx      475 rx    24654
[2] tx      474 rx        0

Anyone have any suggestions?

Thanks,

Edwin

-- 
<=+=+=+==+=+=+==+=+=+=+=+=+=+=+=>
Edwin Whitelaw, P.E.
New River Valley Unwired, LLC
2200 Lonesome Dove Dr
Christiansburg, VA 24073
540-239-0318