Troubleshooting 802.11b, some suggestions...

(use a system in 'promiscuous mode' to sniff the air - (grep -i promiscuous *; tcpdump))

Windows 95, 98, Me

'Config Pannel'
    'PCMCIA' says what card is in the socket, start/stop service
    'System'
        'Gestionnaire de périphériques'
            'Network adapters' gives the driver versions, IRQ & IO-map
            'PCMCIA extensions' gives the driver versions, IRQ & IO-map
    'Network'
        <network adapter>
            <properties> handles the card setup (channel; ad-hoc/infrastructure; Wep; ...) ***
        <protocol stack>-><network adapter>
            <properties> handles the protocol stack setup : IP address, route, DNS,...

?self DHCP settings

In a DOS box
    'winipcfg' gives the actual configuration (IP address, mac-address)
    'arp -a' gives resolved nodes (assoc. MAC-address/IP-addess)
    'ping -t <host-ip>' tests node reachability
    'route ...' allows to display/change routing parameters

Linux

tail /var/log/messages
dmesg(1)
cat /proc/interrupts (check for the specific IRQ and look at counters)
cat /proc/iomap (?)

/etc/pcmcia/config (chained with /etc/pcmcia/*.conf and /etc/pcmcia/config.opts)
-> /etc/pcmcia/network and/or (?) /etc/pcmcia/wireless shell scripts

note: you must notice 'cardmgr' when you change the config :
        [extract the card]
            ps -ax | grep card
            kill -s SIGHUP <cardmgr-pid>
        [insert the card]

ifconfig wlan0 (eth0?)
iwconfig wlan0
iwpriv wlan0

tcpdump -e -i wlan0
ping <host>

Making a kernel,... (some reminders)

cd /usr/src
tar xvfz linux-2.4.9.tar.gz
ln -s linux-2.4.9 linux
cd linux [read the README...]
make xconfig ... configurer (?obsolete netlink emulation mandatory)
make clean dep bzImage
make modules modules_install
copy /usr/src/linux/arch/i386/boot/bzImage /boot/vmlinuz_new ; ? System_map?
edit /etc/lilo.conf ...
lilo (install the new kernel loader)

cd /usr/src/
tar xvfz pcmcia-cs.1.2.28.tgz (?)
cd pcmcia-cs.1.2.28
make config all install

sync
shutdown -r now

...enjoy!

Any comment, ideas, corrections... , mail Christophe Cattelain (02sep01)