[CentOS] Centos machine sometimes unreachable

Richard Reina wrote:
> I have a simple perl script that every few hours pings the handful of
> machines on my LAN. Lately I've sometimes been getting
>
> ping of 192.168.0.1 succeeded
> ping of 192.168.0.7 succeeded
> ping of 192.168.0.5 FAILED
> ping of 192.168.0.6 succeeded
> ping of 192.168.0.9 succeeded
>
>   This machine in question has been running Centos faithfully for about
> six years and no recent changes to it have been made. When I try and
ping the
> machine manually it works.   /var/og/messages does not seem irregular.
> Does anyone know know what might be the problem or what else I might check?

Have you done an ifconfig on 5, and seen if there's any collisions, etc?
Another possibility is that *you* haven't changed, but someone else has
put a piece of hardware on the LAN that's trying to get that IP, or has it
configured for that IP.

     mark, who *really* wishes that the network folks would give
              their hardware IPs by MAC, not broadcast