From owner-freebsd-stable  Mon Nov 19 18:57:10 2001
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To: Brian McDonald <brian@lustygrapes.net>
Cc: <freebsd-stable@FreeBSD.ORG>
Subject: Re: unknown kernel error message
References: <20011114213209.O1437-100000@nivomede.internal.lustygrapes.net>
From: James McNaughton <jtm63@enteract.com>
Date: 19 Nov 2001 20:56:53 -0600
In-Reply-To: Brian McDonald's message of "Wed, 14 Nov 2001 21:36:19 -0500 (EST)"
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Brian McDonald <brian@lustygrapes.net> writes:

> After someone suggested that Mandrake Linux can send the arp for type 0800
> on occasion, I got a tcpdump running when my wifes laptop shutdown this
> evening:
> 
> nivomede# tcpdump -lenx arp
> tcpdump: listening on fxp0
> 21:30:47.609116 0:10:a4:b8:93:2c ff:ff:ff:ff:ff:ff 0806 60: arp-#2 for
> proto #2048 (4) hardware #2048 (0)
> 			 0800 0800 0004 0002 0000 0000 0000 c0a8
> 			 0a4c 0000 0000 0000 ffff ffff 0000 0000
> 			 0000 0000 0000 0000 0000 0000 0000
> 
> The correlation to the kernel message was right on time.  Not a FreeBSD
> problem, I'd think.
> 
That's very interesting. Why would it advertise that MAC?

> Brian
> 
> On Wed, 14 Nov 2001, Conrad Sabatier wrote:
> 
> > Date: Wed, 14 Nov 2001 21:07:02 -0600 (CST)
> > From: Conrad Sabatier <conrads@home.com>
> > To: James McNaughton <jtm63@enteract.com>
> > Cc: freebsd-stable@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG,
> >      Rick Bradley <roundeye@roundeye.net>
> > Subject: Re: unknown kernel error message
> >
> >
> > On 14-Nov-2001 James McNaughton wrote:
> > >> >
> > >> > Nov 11 22:36:10 unixpros /kernel: arp: unknown hardware address format
> > >> > (0x0800)
> > >>
> > >
> > > I get this same message often since I got a cable modem. There seems
> > > to be no pattern as to when it occurs. I infer from the wording that
> > > someone on the local ethernet segment is advertising a weird
> > > non-ethernet MAC address.
> > >
> > > I have found no explanation so far and stopped looking for one. There
> > > appears to be no degredation to my system performance.
> > >
> > > Is this coming from the ISP's network or is it an internal network?
> >
> > As far as I know, he's only connected through his NIC to a cable modem.

AHA! A correlation! But does it mean anything?

So far I've found FreeBSD reports a lot of things on the console that
other OS's just keep quiet about. I've gotten used to it. With more
experience you learn to filter out the critical from the informative.

I hardly ever get critical errors.

Jim

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