arplookup host not on local network

[James Long]

> i rebooted my dual boot (with winxp), dhcp, 4.8-REL_ENG machine today,
> and noticed for the first time some strange behavior.
> 
> i can boot successfully, but i notice recurring messages in
> /var/log/messages, which read
> 
> Jul  5 21:04:23 hostname-15m1kxku /kernel: arplookup xx.xx.xx.xx failed:
> host is
> not on local network
> 
> note: xx.xx.xx.xx looks like an ip on the same subnet as my box, ie.,
> the first two octets are similar.

One possibility is that your netmask is incorrect.  What does ifconfig
say for whichever interface is configured on that network?