Re: What's up with the IP stack?

> Date: Tue, 14 Oct 2003 09:56:47 -0700
> From: Terry Lambert <tlambert2_at_mindspring.com>
> 
> Kevin Oberman wrote:
> > When I see this I can reach some LAN hosts, but not others. I can
> > always seem to reach the access point. I can usually, but not always,
> > reach most other systems on the LAN, but not the gateway router, a
> > Sonic Wall firewall. I have logged onto another system and then
> > connected to the firewall, so it looks like the physical path is OK.
> > 
> > The problem is intermittent and I have only scattered data. I've been
> > seeing it sice about the beginning of October. I was blaming it on
> > hardware, but now that I see these reports, maybe it's not. (I just
> > replaced my Apple Airport AP with a D-Link, so there is something to
> > suspect.)
> > 
> > In may case things just start working again. The pause can vary from a
> > few seconds to about 10 minutes. netstat -rnf inet and arp -a output
> > both look to be fine.
> 
> What about your IP address and default route?
> 
> I've seen wireless cards, especially IBM ones, fail to get good
> signal, leaving you with a link.local address, or a valid address,
> but no default route.  This may be your problem here.
> 
> You might want to "just put the AirPort back"...

The problem is that the Airport died. Looks like a power supply issue
or a bad cap as it fails whenever it's moving lots of data and then
recovers after several quite seconds. My wife's laptop link dies at
the same time, so that's why I bought the Linksys. (Sorry for saying
D-Link. I get them confused too often.)

No. I am monitoring signal strength and it is excellent. I use a
static address and gateway and they're fine, too. Both 'arp -a' and
'netstat -rnf inet' show what I would expect including the proper MAC
address for the firewall and the hub.

I've been using this card for about a year and a half and this problem
has just shown up in the past few weeks.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman_at_es.net			Phone: +1 510 486-8634