3com Wireless Networkcard under RedHat 8

Discussion in 'Linux Networking' started by Scott Hazelhurst, Oct 23, 2003.

  1. I am trying to install my wireless network card on my laptop and have
    spent many many hours of frustration. I've looked in all the obvious
    places for help. So any ideas gratefully received.

    Details: 3com OfficeConnect crshpw796 802.11 network card on HP xe4500
    running RedHat 8.

    I downloaded the drivers from the ADMtek web site, and made the driver
    without any problems. I do an insmod and the light on the network
    card comes on and starts flashing happily. I try do do sensible things
    with network configuration (see below for the output of ifconfig)
    and there are no obvious problems. But the link light does not come
    on, and nor does networking.

    I have tried to use iwconfig (see output) but I can't see anything
    obvious to do. iwlist says no access points in range.

    If I boot up in Windows it all works beautifully.

    Any ideas (please)



    Output of ifconfig

    eth1 Link encap:Ethernet HWaddr 00:0B:AC:E6:50:BB
    inet addr: Bcast: Mask:
    RX packets:2 errors:0 dropped:0 overruns:0 frame:0
    TX packets:182 errors:171 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:100
    RX bytes:150 (150.0 b) TX bytes:11640 (11.3 Kb)
    Interrupt:5 Base address:0x4000

    Output of iwconfig

    eth1 IEEE 802.11-DS ESSID:"" Nickname:""
    NWID:eek:ff/any Mode:Ad-Hoc Frequency:2.412GHz
    Cell: 02:91:F2:2C:91:00 Bit Rate=11Mb/s Tx-Power=47 dBm
    Retry limit:3 RTS thr=2346 B Fragment thr=2346 B
    Encryption key:eek:ff
    Power Management:eek:ff
    Link Quality:0 Signal level:0 Noise level:0
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:0 Missed beacon:0
    Scott Hazelhurst, Oct 23, 2003
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  2. Scott Hazelhurst

    Neil Horman Guest

    Have you compared the iwconfig report above to the settings your windows
    machine uses on this card? It could be that you need to adjust your
    sensitivity, tx power, frequency/channel, etc. You may also want to
    check out:


    *Neil Horman
    *Software Engineer
    *Red Hat, Inc., www.redhat.com
    *gpg keyid: 1024D / 0x92A74FA1
    Neil Horman, Oct 24, 2003
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  3. Thanks for the response. I have tried, but I'll look at this again.

    I had seen this, and it is useful though it is for other versions of
    the 3com card which use a different chipset (atml rather than admtek).

    Further update: something I hadn't spotted before is that after
    activating the card the following messages get written to
    /var/log/messages in an endless loop

    Oct 25 01:21:37 carmel kernel: set channel 12
    Oct 25 01:21:37 carmel kernel: set channel 13
    Oct 25 01:21:37 carmel kernel: set channel 14
    Oct 25 01:21:37 carmel kernel: set channel 1
    Oct 25 01:21:37 carmel kernel: set channel 2
    Oct 25 01:21:37 carmel kernel: set channel 3
    Oct 25 01:21:38 carmel kernel: set channel 4
    Oct 25 01:21:38 carmel kernel: set channel 5
    Oct 25 01:21:38 carmel kernel: set channel 6
    Oct 25 01:21:38 carmel kernel: set channel 7

    I'll look at all the settings again and try to work through it from

    Thanks for the pointers.

    Scott Hazelhurst, Oct 24, 2003
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