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RE: [nv-l] xnmsnmpconf question

To: nv-l@lists.tivoli.com
Subject: RE: [nv-l] xnmsnmpconf question
From: James Shanks <jshanks@us.ibm.com>
Date: Tue, 16 Sep 2003 10:13:13 -0400
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I can confirm that performance improvements have been made in this area by  7.1.3 Fixpack1  -- I have heard about them in meetings -- but I have no details to share.  That's not my area of the code.  You'll just have to take my word for it, I guess.  I cannot tell you when exactly the improvements occurred, nor exactly what was done. But we simply don't handle hints the same way as we used to and the underlying code for xnmsnmpconf was rewritten to improve performance.  That much I'll swear to.  

As for speeding up the migration, surely you are joking.   What is your customer waiting for?  NetView 5.1.2 wasn't even the last release of NetView Version 5.1.  We stabilized it at NetView 5.1.3.  That level alone contained dozens of fixes your customer doesn't have.   Your customer is running code which is already about four years out of support.  It is so old that I doubt that anyone on the planet can help you figure out what to do with it, except to upgrade.   My advice is to get on a currently supported level, and then you can real help with whatever problems you might still have.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and Windows
Tivoli Software / IBM Software Group

Pritesh Jewan <Pritesh@aptronics.co.za>

09/16/2003 04:28 AM

        To:        Leslie Clark/Southfield/IBM@IBMUS
        cc:        "'nv-l@lists.tivoli.com'" <nv-l@lists.tivoli.com>
        Subject:        RE: [nv-l] xnmsnmpconf question

Hi Leslie,

What is the difference between !@oid 0 and !@oid ? I thought they meant the
same thing? Has the way that excluded devices are checked changed with
Netview V7.1.3? If so can you please elaborate as I need to explain this to
the customer to speed up the process of getting them to implement V7.1.3.
Does the discover backbone option prevent hints from appearing in the

What I have also noticed is that if we clear the cache using xnmsnmpconf
-clearCache and then monitor the number of entries using xnmsnmpconf
-dumpcache, Netview seems to be gradually building up the cache. But during
this time no demandpolls work and no status polling is happening(confirmed
by trying to get netmon to dump to a trace file). Is this list built to use
during the next config check and also why is netmon not responsive during
this process. My understanding is that Netmon does not use this list to do
it's status polling...is this correct?

Thank You

-----Original Message-----
From: Leslie Clark [mailto:lclark@us.ibm.com]
Sent: Tuesday, September 16, 2003 6:12 AM
To: nv-l@lists.tivoli.com
Subject: Re: [nv-l] xnmsnmpconf question

The behavior in this area varies with every release. I have never checked
the output of xnmsnmpconf -dumpCache. I have checked the size of
snmsnmpconf -exp <filename> and found that, in late V6, using non-public as
the default resulted in public entries for every snmp-capable device (with
public) that I was excluding by !@oid entries. Obviously that would not be
the case with devices excluded by !@oid 0.

The thing to remember is that excluded devices, in V5, were re-checked with
every configuration poll to see if they had changed into something that was
acceptable.  Tell your customer to add some negative address ranges to the
seedfile. Those addresses will not cause hints, and probably will not cause
the cache to get so big. Also tell them to upgrade. If they are short of
cash, suggest Linux on Intel.


Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking

                     Pritesh Jewan

                     <Pritesh@aptronic        To:
                     s.co.za>                 cc:

                                              Subject:  [nv-l] xnmsnmpconf
                     09/15/2003 12:02


Hello people,

Customer is running Netview v5.1.2 on AIX 4.3. Auto discovery switched on.
They control discovery with the !@oid 0 and have a number of specific
entries to ensure that routers are discovered with their loopback
interfaces. My understanding is that !@oid 0 would create a hint in the
database for every non-snmp device. Netmon should only poll the devices
that are discovered and managed and not the hints. The following are the
values from ovtopodump -rl and ovobjprint -S:

Ovtopodump -rl






Ovobjprint -S

Number of objects defined in the database: 63316

When I run an xnmsnmpconf -dumpCache and count the lines there are 73569
lines. Is it normal for Netview to put all devices in the object database
into the snmpconf cache or should it only put the devices that should be
polled for status? The problem is that when they make changes to snmp
configurations it is taking very long for netmon to start demand poll and
status checking(sometimes upto 6 hours) - is this normal? If the hints are
suppose to be in the xnmsnmpconf cache, what is the reason for this ?

Any assistance with these questions is greatly appreciated



Pritesh Jewan
Aptronics (Pty) Ltd
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