iPod Touch with IphoneOS 3.0 does not work

[wlanmac]

My guess is that this is all highly device/driver specific. With a
little testing with the iPod, I'm seeing

- It associated with AP1/BSSID1 and did DHCP, all is fine
- I walked (almost) out of range and into range of AP2/BSSID2
- iPod shows full signal bars, but no connectivity in Safari, it has
same IP assigned by AP1 (I'm using anyip, so that shouldn't matter
much).
- Used the app called "WifiTrak" to show signals (and BSSIDs)
- WiFiTrak shows my target SSID, BSSID2, and that I'm NOT connected. It
doesn't list BSSID1 at all (though still thinks it is connected to it).

Interestingly, just running WiFiTrak seems to usually cause the problem
to resolve as I'm guessing it triggers a re-association (and also a new
DHCP lease request) on the new AP2/BSSID2. It will also resolve if I
renew the DHCP lease or just wait enough time. So, I'm thinking that the
iPod isn't exactly behaving like it should. 

David

On Wed, 2009-07-15 at 10:27 +0200, Thomas Liske wrote:
> Hi,
> 
> wlanmac wrote:
> > I'm using this version of chilli, on open-mesh routers, with an updated
> > iPod touch, without problems. A network trace would help diagnose the
> > problem. 
> > 
> > Though, I have noticed that the iPod sometimes has issues when it sees
> > multiple nodes with the same SSID. For instance, I'll get a DHCP lease
> > from one (further) node, and then it seems the iPod switched to talking
> > to the closer node, without doing a new DHCP lease. If you release your
> > DHCP lease, does it help?
> 
> APs with the same SSID build up an ESSID which has to be one big L2 
> broadcast domain. A STA which roams from one BSSID to another in the 
> same ESSID don't need to do a DHCP request - this would break roaming 
> (doing another DHCP request takes much time and if the STA get's an 
> different IP in the new BSSID it would break any L3 connections).
> 
> 
> Regards,
> Thomas
>