strange problem with LAN

[Kam Leo]

On 4/10/07, Gerhard Magnus <magnus at agora.rdrop.com> wrote:
> On Tue, 2007-04-10 at 12:56 -0700, Gerhard Magnus wrote:
> >
> > When I booted up the machine at 192.168.1.13, instead of the usual
> > report of eth0 being activated I saw an error message: "Some other host
> > already uses 192.168.1.13".  I was unable to ping 192.168.1.13 from
> > another machine.  Box 192.168.1.13 remained unconnected to the LAN until
> > I manually activated eth0 using system-config-network.  Then everything
> > worked normally.
> >
> > I rebooted another of the boxes 192.168.1.11 and got a similar message:
> > "Some other host already uses 192.168.1.11".  Again, activating eth0
> > solved the problem.
> >
> Further information:
> (1) I don't use DHCP to assign IP addresses on the LAN
> (2) On my machines dual booting FC6 and XP (where the XP boxes use a
> different range of IP addresses) Windows isn't having this problem.
> (3) I update my linux systems regularly.

Is your router enabled as a dhcp server?