Re: ath0 goes down periodically

On Sat, May 28, 2005 at 11:08:41AM -0700, Sam Leffler wrote:
> I thought you had a machine using the ath driver and acting as an ap. 

Sorry if I confused the situation:

I have both an AP and a client, both with the same kind of ath card,
both running FreeBSD.

> when the machine acting as an ap stops working can you see still 
> see beacon frames being transmitted?
> 
> To do this you need to have another machine.  If the other machine is a 
> client to the ap and using an ath card then 80211stats should show the 
> count of beacon frames processed growing.  Otherwise you can use tcpdump 
> on the other machine to see beacon frames using something like:
> 
> tcpdump -i ath0 -y IEEE802_11

Got it.  Thanks.  Next time it happens, I'll do what you said.

> If your problem is that the ap stops broadcasting beacons then all data 
> frames will backup behind because normal data frames are queued on a 
> different h/w tx queue that will be blocked by the inability to xmit the 
> beacon frames.

That sounds like it could be the case, but I can't yet confirm that the
beacons are stuck.  I'll get back to you as soon as it happens again.

Thanks for your time, and all the great work you're doing, Sam!

--Emil