[Voyage-linux] wifi device discovery

[bob]

Aloha Edwin,

Sorry I didn't get back to you earlier, I meant to have a quick look ath 
ath_pci to see how the cards are discovered, but still haven't had a 
free minute.  I don't think I've ever seen the behaviour that you 
described.  On the wraps that I use, I think the rear (flash side) card 
always comes up wifi0, but not positive.

Thanks,
bob

Edwin Whitelaw wrote:
> Folks,
> 
> I had posted about this back in April when 0.3 came out and hadn't seen 
> it happen since the 0.4 releases until today.  I have a WRAP running 
> 0.4.1, all upgrades.  One Engenius NL2611 as 2.4GHz AP and one CM9 
> backhaul on channel 52.  Seems it's a random thing as to which radio 
> gets wifi0 and which gets wifi1.  Obviously having the wrong order on 
> boot takes the system out of service since the configuration parameters 
> are totally different for the two radios.  I had one suggestion 
> regarding adding some udev rules to match MAC addresses and assign 
> interface names to radios discreetly but I would prefer to simply know 
> which mini-PCI slot was going to get 0 and which gets 1 and have it stay 
> that way.  Has anyone else experienced this?  Is this a direct result of 
> udev?  What's the best approach to remove the uncertainty in device 
> discovery?
> 
> Thanks,
> 
> Edwin
> 
> -----------------
> Linux auburnhills 2.6.20-486-voyage #1 PREEMPT Mon Jul 16 06:39:47 GMT 
> 2007 i586
> 
> The programs included with the Debian GNU/Linux system are free software;
> the exact distribution terms for each program are described in the
> individual files in /usr/share/doc/*/copyright.
> 
> Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> permitted by applicable law.
> __  __
> \ \/ /___ __  __ ___  ___  ___    Useful Commands:
>  \  // _ \\ \/ /,-_ |/ _ |/ -_)     remountrw - mount disk as read-write
>   \/ \___/ \  / \___,\_  |\___|     remountro - mount disk as read-only
>           _/_/        _'_|          remove.docs - remove all docs and 
> manpages
>     { V o y a g e } - L i n u x
>      < http://linux.voyage.hk >   Version: 0.4 (Build Date 20070723)
> 
> ---
> auburnhills:~# iwconfig
> lo        no wireless extensions.
> 
> eth0      no wireless extensions.
> 
> wifi0     no wireless extensions.
> 
> wifi1     IEEE 802.11b  ESSID:"auburnhills"  Nickname:""
>          Mode:Master  Frequency:2.427 GHz  Access Point: 00:02:6F:36:9E:50
>          Bit Rate:11 Mb/s   Tx-Power=23 dBm   Sensitivity=1/3
>          Retry short limit:8   RTS thr:off   Fragment thr:off
>          Encryption key:xxxxxxxxxxxxxxxxxxxxxx   Security mode:restricted
>          Power Management:off
> 
> wlan0     IEEE 802.11b  ESSID:"auburnhills"  Nickname:""
>          Mode:Master  Frequency:2.427 GHz  Access Point: 00:02:6F:36:9E:50
>          Bit Rate:11 Mb/s   Tx-Power=23 dBm   Sensitivity=1/3
>          Retry short limit:8   RTS thr:off   Fragment thr:off
>          Encryption key:xxxxxxxxxxxxxxxxxxxxxx   Security mode:restricted
>          Power Management:off
>          Link Quality:0  Signal level:0  Noise level:0
>          Rx invalid nwid:0  Rx invalid crypt:255  Rx invalid frag:0
>          Tx excessive retries:83  Invalid misc:3121   Missed beacon:0
> 
> br0       no wireless extensions.
> 
> ath0      IEEE 802.11a  ESSID:"reilly-ah"  Nickname:""
>          Mode:Managed  Frequency:5.26 GHz  Access Point: 00:0B:6B:36:FE:21
>          Bit Rate:36 Mb/s   Tx-Power:16 dBm   Sensitivity=0/3
>          Retry:off   RTS thr:off   Fragment thr:off
>          Encryption key:xxxxxxxxxxxxxxxxxxxxx   Security mode:restricted
>          Power Management:off
>          Link Quality=28/94  Signal level=-66 dBm  Noise level=-94 dBm
>          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> -----
> # Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
> # /usr/share/doc/ifupdown/examples for more information.
> auto lo
> iface lo inet loopback
> 
> #auto eth0
> #iface eth0 inet dhcp
> 
> # hostap WDS Bridge
> auto br0
> iface br0 inet static
>        address 172.17.24.1
>        netmask 255.255.255.0
>        broadcast 172.17.24.255
>        bridge_ports eth0 wlan0
>        pre-up iwconfig wlan0 mode Master essid auburnhills channel 4
>        up iwconfig wlan0 key s:xxxxxxxxxxxx
>        up iwconfig wlan0 txpower 23db
> 
> auto br0:0
> iface br0:0 inet static
>        address 172.16.24.1
>        netmask 255.255.255.0
>        broadcast 172.16.24.255
> 
> auto br0:1
> iface br0:1 inet static
>        address 192.168.1.200
>        netmask 255.255.255.0
>        broadcast 192.168.1.255
> 
> auto ath0
> iface ath0 inet static
>        address 10.220.6.2
>        netmask 255.255.255.0
>        broadcast 10.220.6.255
>        gateway 10.220.6.1
>        madwifi-base wifi0
>        wireless-mode Managed
>        wireless-essid reilly-ah
>        wireless-key s:xxxxxxxxxx
>        up athctrl -i wifi0 -d 4800
>        up /sbin/sysctl -w dev.wifi0.diversity=0
> #       up /sbin/sysctl -w dev.wifi1.txantenna=1
> #       up /sbin/sysctl -w dev.wifi1.rxantenna=1
> #       up /etc/tc/qos
> #       up remountro
>        down wlanconfig ath0 destroy
>