Date: Mon, 7 Jan 2002 13:14:59 +1030 From: Greg Lehey <grog@FreeBSD.org> To: cjclark@alum.mit.edu Cc: FreeBSD Stable Users <freebsd-stable@FreeBSD.ORG> Subject: Re: arplookup 0.0.0.0 failed? Message-ID: <20020107131459.H10564@wantadilla.lemis.com> In-Reply-To: <20020105190200.H204@gohan.cjclark.org> References: <20020105142300.G24766@wantadilla.lemis.com> <20020105190200.H204@gohan.cjclark.org>
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On Saturday, 5 January 2002 at 19:02:00 -0800, Crist J. Clark wrote:
> On Sat, Jan 05, 2002 at 02:23:00PM +1030, Greg Lehey wrote:
>> I've recently upgraded a machine to 4.5-PRERELEASE and am now getting
>> messages such as
>>
>> Jan 5 12:33:39 echunga /kernel: arplookup 0.0.0.0 failed: host is not on local network
>>
>> Any idea what could be causing this?
>
> Run,
>
> # tcpdump -n 'host 0.0.0.0'
>
> For a while and see if anything interesting pops up. I tracked this
> down once before, but the heck if I can remember what the issue was.
Hmm, I could have thought of that myself, except that I wasn't really
expecting any traffic.
Anyway, this is what I get (with the -e option so I can track it):
12:59:56.610694 0:4:ac:e4:b3:cf 0:2:44:17:f8:da arp 60: arp who-has wantadilla.lemis.com tell 0.0.0.0
12:59:56.610731 0:2:44:17:f8:da 0:4:ac:e4:b3:cf arp 60: arp reply wantadilla.lemis.com is-at 0:2:44:17:f8:da
13:00:51.611834 0:4:ac:e4:b3:cf 0:2:44:17:f8:da ip 146: 0.0.0.0.483635503 > wantadilla.lemis.com.nfs: 104 getattr [|nfs] (DF)
This happens exactly once a minute.
Looking at arp -a, I find that the Ethernet address 0:4:ac:e4:b3:cf is
that of my machine echunga. On that machine, I find:
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 192.109.197.82 netmask 0xffffff00 broadcast 192.109.197.255
inet6 fe80::200:21ff:feca:6ef1%rl0 prefixlen 64 scopeid 0x1
inet 192.109.197.137 netmask 0xffffffff broadcast 192.109.197.137
ether 00:00:21:ca:6e:f1
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
About the only thing unusual there is the alias address. There's no
dhclient running, and this only started after the upgrade. I'm still
puzzled.
Greg
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