Date: Mon, 13 Dec 1999 19:49:16 -0500 (EST) From: "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com> To: delaitt@cpc.wmin.ac.uk (Thierry Delaitre) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: arplookup messages Message-ID: <199912140049.TAA75105@cc942873-a.ewndsr1.nj.home.com> In-Reply-To: <Pine.BSF.4.10.9912131012300.2427-100000@seth.cpc.wmin.ac.uk> from Thierry Delaitre at "Dec 13, 1999 10:22:39 am"
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Thierry Delaitre wrote,
>
> Hi,
>
> I use a FreeBSD box running FreeBSD 3.4-RC as a router and I keep getting
> some arplookup messages. The routing of IP packets works properly but why
> do I keep getting these messages ? I was using a FreeBSD 2.2.x box before
> and I was not getting these messages at all. Any help would be
> appreciated.
Don't have a real solution, but I think I see the problem and I have
one question (that might be a solution).
> The network configuration of the 2 ethernet interfaces is described below
> as well as the routing table. Please note that the netmasks for xl0 & xl1
> are both correct. Please also note that I use routed -s to manage the
> routing table.
>
> xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 161.74.69.77 netmask 0xffffff00 broadcast 161.74.69.255
> ether 00:10:4b:46:80:9c
> media: 100baseTX <full-duplex>
> supported media: autoselect 100baseTX <full-duplex> 100baseTX
> <half-dupl
> ex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP <half-duplex>
> 10baseT/UTP
>
> xl1: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
> inet 161.74.70.30 netmask 0xfffffff0 broadcast 161.74.70.31
> ether 00:10:4b:46:81:1a
> media: 10baseT/UTP <half-duplex>
> supported media: autoselect 100baseTX <full-duplex> 100baseTX
> <half-dupl
> ex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP <half-duplex>
> 10baseT/UTP
>
> Routing tables
>
> Internet:
> Destination Gateway Flags Refs Use Netif
> Expire
> default 161.74.69.1 UGSc 68 62993 xl0
> 127.0.0.1 127.0.0.1 UH 1 260 lo0
> 161.74.69/24 161.74.69.63 UGc 9 28713 xl0
^^^^^^^^^^^^
Problem: According to this entry, your machine uses this host as a
gateway to talk to 161.74.69/24. Thus, it cannot ARP for the machines
below since it believes it has no layer 2 link to them, only an IP
connection. (The entry 161.74.69/24 _should_ be 'link#1' analogous to
the 161.74.70.16/28 entry below.)
Question: Why are you running routed(8)? If you have a default gateway
that never changes, the static 'default' entry above, I don't see what
routed will do for you. I think turning off routed would fix your
problem, but there may be some non-obvious reason you are using it.
> 161.74.69.1 0:80:3e:5d:7f:e6 UHLW 64 0 xl0 1043
> 161.74.69.63 0:0:c0:b7:df:a1 UHLW 5 2677 xl0 291
> 161.74.69.77 0:10:4b:46:80:9c UHLW 15 64486 lo0
> 161.74.70.16/28 link#2 UC 0 0 xl1
> 161.74.70.29 8:0:20:72:48:fc UHLW 2 19082 xl1 234
> 161.74.70.30 0:10:4b:46:81:1a UHLW 0 1 lo0
> 161.74.70.31 ff:ff:ff:ff:ff:ff UHLWb 0 1 xl1
>
> Dec 13 10:05:13 seth /kernel: arplookup 161.74.69.75 failed: host is not
> on local network
> Dec 13 10:14:01 seth /kernel: arplookup 161.74.69.78 failed: host is not
> on local network
> Dec 13 10:15:34 seth /kernel: arplookup 161.74.69.74 failed: host is not
> on local network
> Dec 13 10:17:59 seth /kernel: arplookup 161.74.69.70 failed: host is not
> on local network
--
Crist J. Clark cjclark@home.com
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