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Re: TME NetView ping sweep

To: nv-l@lists.tivoli.com
Subject: Re: TME NetView ping sweep
From: Art DeBuigny <debuigny@DALLAS.NET>
Date: Thu, 15 Apr 1999 15:14:01 -0500
Reply-to: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>
Sender: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>
Netview DOES do ping sweep methodology for autodiscovery.  You enter the
boundaries that you want it to 'sweep', in your seed file, and at a set
interval, it ping's all possible IP addresses in that seed file and not in
your current database.  Any ping that responds causes netview to create a
node for it.

You need to put the ranges in your seed file.

Will NetView discover a node automatically if its router has been left out
of its seed file?

Art DeBuigny
debuigny@dallas.net
-----Original Message-----
From: Marco Mommers <marco.mommers@EUROCONTROL.BE>
To: NV-L@UCSBVM.UCSB.EDU <NV-L@UCSBVM.UCSB.EDU>
Date: Thursday, April 15, 1999 11:02 AM
Subject: TME NetView ping sweep


>As far as I understand TME NetView is NOT applying ping sweep mechanisms
for node
>discoveries, neither for :
>        1. Automatic new node discoveries nor for
>        2. Seed file discoveries (address ranges or wildcards are used as
filters).
>
>So network components having an IP address but not using it for
communication will
>not be discovered unless implicitely defined in the seed file. So what to
do in the
>following (theoretical) cases:
>
>        1. Bridges operate on Layer 2, some of them have an IP address such
that
>they can be managed using SNMP. However if the SNMP agent has nothing to
report for
>e.g. a time longer then the ARP flush time of its communication partners,
NetView
>will not be able to discover such a bridge unless its IP address is
implicitely
>listed in a seed file. But I don't like the issue that I have to update my
seed when
>I add such a bridge for example.
>
>        2. A hot standby system which is not supposed to communicate unless
its
>detects an outage of the main system for which it acts as standby.
>
>So I guess to solve such a kind of problems I have two possibilities:
>        1. Use the seed file.
>        2. Use a script file (or whatever) performing a (limited) ping
sweep (= just
>trying IP addresses in a certain range) at regular intervals from the
management
>station. I know this is quite constly in terms of band-width and execution
time.
>
>--
>-----------------------------------------------
>- Marco Mommers                               -
>-       Eurocontrol Maastricht UAC            -
>-       Engineering division                  -
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>-        email : mommers@cobweb.nl            -
>-----------------------------------------------

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