Personally, I'd start with Wireshark see what's happening now. Then setup
Nagios for longer term
https://www.nagios.org/
On Sat, Jun 11, 2022 at 4:14 AM lejeczek via CentOS <centos@xxxxxxxxxx>
wrote:
>
>
> On 08/06/2022 20:19, Christopher Wensink wrote:
> > Everyone,
> >
> > From time to time on our network we experience a pause
> > where it seems like everything just hesitates for a time,
> > this could be 2-10 seconds, then communications resume and
> > everything is normal again.
> >
> > I suspect that there one machine that is occasionally
> > sending out bad packets or is flooding the network when it
> > shouldn't, but I don't know for sure. I've tried scanning
> > with angry ip scanner to confirm IP addresses are set and
> > communicating as documented. I've tried running captures
> > with wireshark to try to identify one culprit but nothing
> > is sticking out.
> >
> > I've tried tcpdump to see if something obvious is placed
> > there, but it's a flood of information and it's difficult
> > to tell what (if anything) is a problem and what is not.
> >
> > I'm also working on setting up icinga for monitoring all
> > servers to see if that provides insight.
> >
> > What other tools / tactics would you use to identify the
> > core cause of these kinds of intermittent pauses?
> >
> > Chris
> >
> Though I can not recommend any specific tools, a learning
> curve should be easy peasy, including tools/solution -
> unless you already looked into it & have it covered - in old
> days with Windowze NIC faulty drivers, OS own issues or
> intentionally provoked network stack misbehavior would/could
> put a device/NIC in the 'promiscuous' mode which would
> results in network "acts" in ways you describe.
>
> good luck, L.
> _______________________________________________
> CentOS mailing list
> CentOS@xxxxxxxxxx
> https://lists.centos.org/mailman/listinfo/centos
>
--
Tate Belden
*NOTE: ka7o@xxxxxxxxxxxxx <ka7o@xxxxxxxxxxxxx> has been depreciated, please
use this address instead: wyoham@xxxxxxxxx <wyoham@xxxxxxxxx>*
"The Dungeon <http://ka7o.net>"
"We do not become enlightened by imagining figures of light, but by making
the darkness conscious."
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
https://lists.centos.org/mailman/listinfo/centos
