Re: Strange arp problem

[Celejar <celejar@gmail.com>]

On Sun, 8 Feb 2009 17:13:11 +1100
Alex Samad <alex@samad.com.au> wrote:

> On Sat, Feb 07, 2009 at 08:10:43PM -0500, Celejar wrote:
> > I've posted about this before, but I still have no solution.
> > 
> > I have a machine with an Atheros WiFi card.  From lspci:
> > 
> > 02:0a.0 Ethernet controller: Atheros Communications Inc. AR5212/AR5213
> > Multiprotocol MAC/baseband processor (rev 01)
> > 
> > >From dmesg:
> > 
> > ath5k phy0: Atheros AR2414 chip found (MAC: 0x79, PHY: 0x45)
> > 
> > The card is supported by the in-kernel ath5k driver; I have previously
> > used it with Madwifi.
> > 
> > I frequently see that arp fails on the machine.  The card continues to
> > function; I can access the internet via my home router, and I can even
> > (sometimes) ssh into it from the internet (the router forwards port 22
> > to that machine), but any attempt to connect to it from the local
> > wireless network times out, and looking at the other machine's arp
> > table indicates that arp is failing (table shows 'incomplete').
> > Manually adding an arp entry with 'arp -s ip_addr mac_addr' fixes the
> > problem, at least for a while.  What could be causing this?  I believe
> > that I have experienced this problem even when the card was controlled
> > by Madwifi.  Could this be a hardware issue?
> 
> Not sure if I can help but.
> 
> 
> My understanding is, that wireless networks work in 2 modes, one where
> each node can see each other and the other is where they can't see each
> other.  But I believe the ap should have a record of each currently
> connected node, maybe you machine is disassociating itself from the
> wireless network ?
> 
> The AP should be able to see it at all times

Thanks, but I don't think that's it.  The problematic machine remains
connected to the AP; as I mentioned, it can access the internet fine.

Celejar
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