[Voyage-linux] wifi device discovery

[Frank Phillips]

Hi Edwin,

On 8/23/07, Edwin Whitelaw <Edwin.Whitelaw at nrvunwired.net> 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?

Yes, udev initializes devices non-deterministically, which is why
rules are needed to keep names persistent. Voyage should already be
generating rules - have you seen the files below? Perhaps the rules
are there, but just need to be uncommented.

/lib/udev/write_net_rules
/etc/udev/persistent-net-generator.rules
/etc/udev/rules.d/z25_persistent-net.rules

Frank