+arplookup ###.###.##.### failed: host is not on local network

[starbuck]

Hey All, I've got a FreeBSD 7 box set up at work and I'm seeing the following message in my periodic daily security output:

*myhostname* kernel log messages:
+arplookup ###.###.55.183 failed: host is not on local network
+arplookup ###.###.55.183 failed: host is not on local network
+arplookup ###.###.55.183 failed: host is not on local network

Where ###.###.55.183 is a local IP address. I did some digging and found out that this is probably due to a netmask configuration problem, but I'm not sure how to resolve it properly.

This server is new and doesn't really do anything right now, it basically just has SSH running. It's on a local University network that uses multiple subnets. So the server has an IP like ###.###.54.106 while the IP address I'm seeing in the security output is ###.###.55.183. These IP addresses are statically assigned, we've actually got servers on the .55 and .54 subnets.

Any ideas on how to fix this?

Here is my netstat -r output:

Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            vl-54-gw           UGS         0    30446    em0
localhost          localhost          UH          0      468    lo0
###.###.54.0       link#1             UC          0        0    em0
vl-54-gw           00:00:5e:00:01:01  UHLW        2        0    em0    106
vl-54.uonet1-gw.uo 00:d0:01:95:e0:00  UHLW        1        0    em0   1199
vl-54.uonet2-gw.uo 00:d0:01:95:dc:00  UHLW        1        0    em0   1196

...and ifconfig

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
        ether 00:15:17:50:a6:3a
        inet6 ...snip... 
        inet ###.###.54.106 netmask 0xffffff00 broadcast ###.###.54.255
        inet6 ...snip... 
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
em1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
        ether 00:15:17:50:a6:3b
        media: Ethernet autoselect
        status: no carrier
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        inet6 ::1 prefixlen 128 
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 
        inet 127.0.0.1 netmask 0xff000000

Thanks!