[CentOS] Centos machine sometimes unreachable

Spiro Harvey spiro at knossos.net.nz
Wed Aug 22 20:55:15 UTC 2012


On Wed, 22 Aug 2012 16:00:45 -0400
m.roth at 5-cent.us wrote:

> Richard Reina wrote:
> > Look like there are some errors although I am not sure what the
> > mean.
> >
> >  eth0      Link encap:Ethernet  HWaddr 00:D0:B7:5A:C6:FE
> >            inet addr:192.168.0.5  Bcast:192.168.0.255
> > Mask:255.255.255.0 inet6 addr: fe80::2d0:b7ff:fe5a:c6fe/64
> > Scope:Link UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >            RX packets:2316067887 errors:0 dropped:0 overruns:1
> > frame:1 TX packets:2451037674 errors:3 dropped:0 overruns:0
> > carrier:3 collisions:0 txqueuelen:1000
> >            RX bytes:221599111550 (206.3 GiB)  TX bytes:575914174697
> > (536.3 GiB)
> >
> > Cable seems fine and machine is in a dark room (no sunlight)
> > although it does run through the ceiling.
> >
> Please stop top posting.

People in glass houses shouldn't throw stones. Complaining about top
posting and then not trimming everything you're not replying to
(like below) is just as bad... 


> I'm not sure, but overrun? Frame? Not sure. Cabling goes into the
> ceiling... was there any wiring or HVAC work done lately, where the
> cables might run?
> 
>      mark
> >
> > 2012/8/22 <m.roth at 5-cent.us>
> >
> >> 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
> >>
> >> _______________________________________________
> >> CentOS mailing list
> >> CentOS at centos.org
> >> http://lists.centos.org/mailman/listinfo/centos
> >>
> > _______________________________________________
> > CentOS mailing list
> > CentOS at centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
> 
> 
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-- 
Spiro Harvey                           Knossos Networks Ltd
(04) 460-2531 : (021) 295-1923          www.knossos.net.nz
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