Re: wifi troubleshooting

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On 03/26/2011 07:40 AM, Adam Tong wrote:
> Hi,
>
> below you'll find the output of ifconfig and iwconfig.
>
>> What is the output of
>>
>> iwconfig
> lo        no wireless extensions.
>
> eth0      no wireless extensions.
>
> wlan0     IEEE 802.11bg  ESSID:off/any
>            Mode:Managed  Access Point: Not-Associated   Tx-Power=0 dBm
>            Retry  long limit:7   RTS thr:off   Fragment thr:off
>            Encryption key:off
>            Power Management:off
>
>> What is the output of
>>
>> ifconfig
>>
> lo        Link encap:Local Loopback
>            inet addr:127.0.0.1  Mask:255.0.0.0
>            inet6 addr: ::1/128 Scope:Host
>            UP LOOPBACK RUNNING  MTU:16436  Metric:1
>            RX packets:8 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:480 (480.0 b)  TX bytes:480 (480.0 b)
>
> Thank you
>
>
>
If you are still using the rt2870 based USB wifi device, please run

lsmod | grep rt2

and show the output.

Also, show be sure that you have configured
/etc/wpa_supplicant/wpa_supplicant.conf correctly.
Example below:

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=wheel

# ap_scan=1
ap_scan=2

network={
         bssid=aa.bb.cc.dd.ee.ff    # This is a fictitious MAC address 
of the router. You must change it to the real MAC address of the router.
         ssid="Your_SSID"
         mode=MANAGED
         key_mgmt=WPA-PSK
         proto=WPA2
         pairwise=CCMP
         group=CCMP
         scan_ssid=1   # only needed if your access point uses a hidden ssid
         psk="AN_ASCII_STRING_OF_RANDOM_CHARACTERS_UP_TO_126_LONG"
}


On my system, I have disabled NetworkManager because it
always starts wpa_supplicant with the wrong arguments.

Also, be sure your ifcfg-wlan0 is created properly.
Example below.

BOOTPROTO=none
DEVICE=wlan0

ESSID=Your_WIFI_Network_Name
BSSID=aa:bb:cc:dd:ee:ff    # This is to substituted by the MAC address 
of your acce
UUID=48a80359-5bb1-ccfe-d847-b4485bbdae59
CHANNEL=11 # Choose your favorite (least noisy) channel
IPADDR=Your_IP_Address_On_The_LAN such as 10.0.0.20
GATEWAY=The_Gateway(i.e.-Router_ip_adress) such as 10.0.0.20
NAME="TheCrappy-ATT-Router"
NETMASK=255.255.255.0
RTS=2346
FRAG=2346
IPV6INIT=no
MODE=Managed
RATE=auto
TYPE=Wireless
USERCTL=yes
NM_CONTROLLED=no
PREFIX=24
ONBOOT=no

Good Luck.

JD
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