Hi, group.
Running AIX 4.2.1.0, NV5.1.1, Framework 3.6.
Box is F50 / 1GB RAM / ca. 18500 objects in database.
Continously monitoring CPU-load and network-traffic of my box.
Every time I stop and restart netmon (or change my SNMP-config),
i am getting the same picture:
CPU-load goes up and stays up (near 100%).
Network-traffic goes down and stays down (ca. 1-5 packets/sec).
After approx. 20 min's netmon suddenly wakes up,
network-traffic peaks out (from an average of 60 packets/sec
up to 500 packets/sec and more).
Afterwards things settle down...
Makes an rather interesting graph ;-)
I think (and watch). Waiting for clues...
Regards, Ralph.
iT-AUSTRIA / OE2100 / TK
Tel (mobil) 0664 1908469
Tel (iT-A) 21717 58948
FAX (iT-A) 21717 58979
Mailto:Ralph.Schiffinger@erstebank.at
> -----Ursprüngliche Nachricht-----
> Von: Leslie Clark [SMTP:lclark@US.IBM.COM]
> Gesendet am: Donnerstag, 26. August 1999 16:10
> An: NV-L@UCSBVM.ucsb.edu
> Betreff: Re: ping response
>
> Well, yes, I hear it too. Somebody out there must know the answer. This
> customer as lots and lots of 3Com Superstacks, and if I take netmon down
> for a while and bring it back up, about one third of those devices are
> unpingable for a half hour to an hour. Little by little they come back.
> And it
> is not false alarms, no amount of pinging fixes it until some time has
> elapsed.
> Maybe the same sort of thing you guys are seeing? It feels like the
> devices
> don't know the way back to the server for a while, then they do. Could it
> be
> their configuration, routing tables, arp cache? Far different subnets in
> most
> cases,
> I think. Waiting for clues...
>
> Cordially,
>
> Leslie A. Clark
> IBM Global Services - Systems Mgmt & Networking
>
>
>
> In my case the device was on a different subnet. Now the puzzlement. Pings
> originating from other devices on the same subnet as my NetView server
> worked. The route tables of these other devices are the same as my NetView
> server therefore the same routers were coming into play. Pings from my
> NetView server to all other devices in this other subnet worked. It would
> also eliminate the arp cache issue. Anyone besides me hear the theme song
> of
> "The Twilight Zone"?
>
> Blaine Owens
> Eastman Chemical Company
> Phone - (423)-229-3579
> Fax - (423)-229-1188
> bowens@eastman.com
>
> > -----Original Message-----
> > From: Chris J. Garlick [SMTP:chris.garlick@eu.effem.com]
> > Sent: Wednesday, August 25, 1999 11:44 AM
> > To: NV-L@UCSBVM.ucsb.edu
> > Subject: Re: ping response
> >
> > .... is it possible that the web server and Netview box are on
> different
> > IP
> > segments..? I have observed cases of messed up routers passing some
> > sub-protocols (SNMP, HTTP etc) but not others (eg ICMP (ping).....) ?
> > The router may have been bounced/reset later, accounting for the
> > mysterious
> > 'fix' ...?
> >
> > Kind Regards
> >
> >
> >
> >
> > Please respond to Discussion of IBM NetView and POLYCENTER Manager on
> > NetView <NV-L@UCSBVM.ucsb.edu>
> >
> >
> >
> > To: NV-L@UCSBVM.ucsb.edu
> >
> > cc:
> >
> > Subject: Re: ping response
> >
> >
> >
> >
> >
> >
> >
> > Just curious - AIX 4.3.2? We had a similar problem a while back. The
> > problem
> > just "went away" - I am still puzzled over it. We could not ping a
> certain
> > web server from NetView but could ping the server from other hosts. Now
> to
> > add to my confusion - all the while that pings were failing I could do
> > SNMP
> > gets and HTTP requests just fine - only pings were failing. I might add
> > that
> > two different ping programs were tried (the AIX supplied one and the
> > public
> > utility called "fping") - both failed. It was not an arp cache problem.
> As
> > mysteriously as the problem appeared it just went away.
> >
> > Blaine Owens
> > Eastman Chemical Company
> > Phone - (423)-229-3579
> > Fax - (423)-229-1188
> > bowens@eastman.com
> >
> > > -----Original Message-----
> > > From: John Creasey [SMTP:creasey@OZEMAIL.COM.AU]
> > > Sent: Wednesday, August 25, 1999 9:01 AM
> > > To: NV-L@UCSBVM.ucsb.edu
> > > Subject: Re: ping response
> > >
> > > Recently our network operators reported a very similar thing
> > > happening. They were certain an interface was up but netview
> > > couldn't ping it. I wasnt present so I was very much baffled
> > > by their claims.
> > >
> > > Have you tried to reproduce the problem? If it is reproducible
> > > it could be a bonafide bug.
> > >
> > >
> > > > -----Original Message-----
> > > > From: Discussion of IBM NetView and POLYCENTER Manager on NetView
> > > > [mailto:NV-L@UCSBVM.UCSB.EDU]On Behalf Of Frantsen Christian
> > > > Sent: Wednesday, 25 August 1999 19:26
> > > > To: NV-L@UCSBVM.UCSB.EDU
> > > > Subject: ping response
> > > >
> > > >
> > > > I noticed something strange the other day when trying some
> > > > things in our
> > > > lab.
> > > >
> > > > I unplugged a switch by removing the TP-cord and i got a node down
> in
> > > > netview (obviously =))
> > > > then I put the cord back in and I couldn't ping the switch
> > > > from the netview
> > > > map, there was no response,
> > > > I got response from it if I pinged it from a machine right
> > > > next to me, I
> > > > tried again from netview, no response
> > > > then I made a ping from the commandline on the
> > > > netview-machine. Now i got a
> > > > response and after that it worked from the map again.
> > > >
> > > > Anyone got some feedback on this?
> > > >
> > > > -----------------------------------------
> > > > Christian Frantsen
> > > > Technical Operations
> > > >
> > > > Internoc Scandinavia AB
> > > > Tel: +46-36-194843
> > > > Fax: +46-36-194651
> > > > http://www.internoc.se
> > > >
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