Re: troubleshooting

On 2008-07-26, stan <smoore@xxxxxxxx> wrote:

Looking at one. I've looked at the packets and they appear to be
correct. The only difference I notice is that the problem machine is
generating a broadcast request while the laptop is using the known
ip/mac address. So I'm thinking the packets are probably OK.

Are all machines using the same netmask and broadcast address?

Looking at two, the signal strength seems fine and one of the machines I
used to monitor the problem machines requests with tcpdump is farther
away. I have been in electronics for over 30 years and I've seen a lot
of strange progagation problems but I'm pretty sure the ap is actually
seeing the requests.

Looking at three, I can't find anything that looks like it could impact
arp requests from the wireless side. I've seen the ap respond to
broadcast requests so even though I couldn't find anywhere to turn that
on or off I don't find that a real strong contender.

My actual request here is for someone to tell me if I'm missing
something, or misunderstanding the big picture here. How about it? Any
ideas on what I could do next?

The ap is a Linksys WRT54G wireless router running the latest firmware
and I have no idea how to get past the web interface into the system to
actually see if the arp requests are being seen. I'm not using dhcp here
I use fixed ip addresses. I can ping the problem computer from the
router.

Even when I manually add the arp on the problem machine, it eventually
clears the table when it doesn't get any response to the unanswered
requests. When I reboot the computer it runs for awhile and then fails.
I can restore operation by restarting the network and manually adding
the ap mac to the arp table.
.

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