Replacing wireless nic on my router

[Ian Smith]

On Mon, 5 Nov 2012 08:47:36 -0800, Adrian Chadd wrote:
 > Hi,
 > 
 > You need to verify that the packet is actually going out over the air,
 > and that it's being received by the client.
 > 
 > It could be rejected for a variety of reasons:
 > 
 > * If it's going out the wrong rate, because somehow it's going out
 > (say) 11n when the client i 11g;
 > * It's being received at the other end but it's being rejected - eg
 > out of sequence, or incorrect encryption setup.
 > 
 > The newer NIC brings with it a different HAL (AR5416/AR9002 HAL versus
 > AR5212 HAL) and so there may be some subtle behavioural changes.
 > 
 > Have you tried running the AP in open mode and ensuring everything can
 > associate?
 > 
 > Thanks,
 > 
 > 
 > 
 > Adrian

Maybe a silly question, it's more likely a wireless problem as you 
suspect, but are we sure there's no firewall involved that might be 
dropping DHCP responses on the client?

cheers, Ian

 > 
 > On 5 November 2012 08:39, Dmitry Kolosov <onyx at z-up.ru> wrote:
 > >> The first thing I'd do is start by verifying that the packet actually
 > >
 > >> went out over the air.
 > >
 > > I think they do. In both ways. I can see it on AP with tcpdump. Linux and
 > > WinXP installed on the same laptop working fine with same AP before and
 > > after changing wireless nic on AP.
 > >
 > >> I'd also use athstats to see if your station is receiving the DHCP
 > >
 > >> replies. The "Rx" counter should be going up each time the server
 > >
 > >> sends the response.
 > >
 > >
 > >
 > > Can't i see it with tcpdump? I'm starting tcpdump on AP and on client at the
 > > same time and run `dhclient wlan0` on client. On client i see outgoing DHCP
 > > request after association with AP. On AP i see incoming DHCP request from
 > > client! On AP i see outgoing DHCP reply to client! But i don't see incoming
 > > DHCP reply on clinet with tcpdump -y IEEE802_11_RADIO or with default media
 > > type.
 > >
 > >
 > >
 > > Thanks in advance, Adrian.
 > >
 > > Really weird. All other devices working just fine.