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Re: One device reported different Link Address to another

To: nv-l@lists.tivoli.com
Subject: Re: One device reported different Link Address to another
From: Simon Long <simon@NETTRACK.COM.AU>
Date: Wed, 7 Oct 1998 18:13:24 +1000
Organization: Nettrack Technical Services Pty Ltd
Reply-to: simon@nettrack.com.au
Sender: Discussion of IBM NetView and POLYCENTER Manager on NetView et alia <NV-L@UCSBVM.UCSB.EDU>
Hi,

Thanks Scott for offering this information.   I haven't been able to get
it to work on Solaris 2.6, however.   Does anyone know why this might be?

Thanks,

Simon Long
Nettrack Technical Solutions Pty Ltd

Scott Wilson wrote:

> There is an "undocumented" option for netmon to turn this check off.  We
> were seeing a ton of them and wanted them stopped, so called support.  I was
> told that this was valid in NV 5.0, 5.1 AIX and NT (I didn't ask about
> Solaris,...).
> # ovstop netmon
> # cd /usr/OV/lrf/netmon.lrf
> # edit /usr/OV/lrf/netmon.lrf (add -x option)
> # ovdelobj netmon.lrf
> # ovaddobj netmon.lrf
> # ovstart netmon
>
> However - once I did this, I could no longer modify netmon settings using
> the Tivoli Desktop or the AIX Smit since it does not know what the -x is, it
> will not open the lrf file (small inconvenience).
>
> HTH,
>
> Scott
>
> Simon Long wrote:
>
> > Hi,
> >
> > I am experiencing the same problem as was involved in the following
> > dicussion which took place some time back:-
> >
> > >hi,
> > >I get follownig error-message permannently:
> > >[Routername...] reported differenet Link Address than obtained from
> > >[Switchname...]
> > >can anybody say, what it is ?
> >
> > >thanks
> > >Esfandiar Tabari
> > >Network Operating Center Hugo Boss Germany
> > >Tel. 0049-7123-94 2581
> > >Fax: 0049-7123-94 82581                  email:
> > >esfandiar_tabari@hugoboss.com
> >
> > >Hi,
> >
> > >I had the same problem.
> > >The switch was in a HUB with several other switches and bridges and had
> >
> > >only one IP address. This address was used for every HUB components.
> > The
> > >routers want to talk to the switch. So they send an ARP request for
> > getting
> > >the MAC address for the switchs IP address. The switch answers to the
> > IP
> > >address and propagates the MAC address of the component which is
> > nearest to
> > >the router. So the router has in his ARP table the MAC address of the
> > >nearest component. Same thing for the NetView machine. The router and
> > the
> > >NetView were connected to different switches. So the router and the
> > NetView
> > >had different MAC addresses for the same IP address in the ARP table
> > and
> > >that is why I got that message.
> >
> > >Hope this helps
> >
> > >Mario
> >
> >  >Nachricht von:                             (Embedded image moved to
> > file:
> >
> > PIC13597.PCX)
> >  >Esfandiar_Tabari
> >  >28
> >
> > Does this mean I just disregard this event or is there something I can
> > do?   It seems to occur a lot on our network.
> >
> > Thanks,
> >
> > Simon Long
> > Nettrack Technical Solutions Pty Ltd
>
> --
> -----------------------------------------------------------
> Scott Wilson                         Email: swilson@rpm.com
> Network Management Consultant        Pager: 800-506-7348
> RPM Consulting, Inc.
> -----------------------------------------------------------

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