Re: what other tools are you using aside from Netview?

2001-07-26 00:39:47
Subject: Re: what other tools are you using aside from Netview?
From: "Leslie Clark" <lclark AT us.ibm DOT com>
To: nv-l AT lists.tivoli DOT com
Date: Thu, 26 Jul 2001 00:39:47 -0400
Now Todd, be nice....;)

I cannot comment on what is or is not 'in the works', but
you have every right to assume that Netview will support what is
in wide use.  I have never seen a device that supports V3, and I
put in a Netview a week. V7 will be along shortly. Yes, V2 support
is incomplete but it has not stopped me yet.

As for data collection, Netview does a fine job of calculating rates
over time.  The documentation is scattered.
See: User's Guide for Beginners Chap 5, Collecting Network Data
See: AdminGuide Chap 7 Managing Network Performance
See: Header in file /usr/OV/conf/mibExpr.conf, man page for mibExpr.conf
See: Header in file /usr/OV/conf/mib.coerce, man page for mib.coerce
See: Header in file /usr/OV/conf/snmpCol.conf
See: man page for snmpCollect
See: online help for Tools..Data Collection & Thresholding dialog
See: man page for snmpColDump

The example you give is of a mib expression. I use them all the time.
There is nothing useful in the file delivered with Netview for Unix,
but a nice one comes with the NT version. I will post it here.

As for RMON, that is a rather large subject.  Vendors who sell rmon
probes usually have proprietary apps for them, and I have found that
implementations differ enough that it is best to use the vendor's app.
Everyone has one. But in the absense of an app, and in the presence of
a device with some rmon capability, I will occasionally just use SNMP
to check things in the RMON mib.

And another thing about Netview: the support is terrific, isn't it.


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

netview AT toddh DOT net (Todd H.)@tkg.com on 07/25/2001 10:48:18 PM

Please respond to IBM NetView Discussion <nv-l AT tkg DOT com>

Sent by:  owner-nv-l AT tkg DOT com

To:   IBM NetView Discussion <nv-l AT tkg DOT com>
Subject:  [NV-L] what other tools are you using aside from Netview?

There are some serious deficiencies in Netview as far as I can
tell--and I'm curious if a) they're valid, and b) what folks are using
to work around them.

SNMP v2/v3 - limited/no support
Given that Netview's support of v2 is incomplete, and support of snmp
v3 isn't even in the works, I'm curious what others are using in place
of Netview for these tasks?

MIB polling calculations with History - can't do it?

Unless I'm missing some hidden functionality, there's no way to
monitor a MIB variable's change in value over time.  For example,
suppose I'm monitoring packet loss and my device provides MIB counters
for packetDiscards and totalPackets.  To arrive at a % packet loss
over a given interval in time, I'd like to take the packetdiscards at
time t2 subtract is from the last sample at time t1, and divide that
by the totalPackets counter at time t2 minus total packets at t1:

 discards(t2) - discards(t1)
 ----------------------------------     * 100  = packet loss %
 totalpackts(t2) - totalpackets(t1)

Is there a way to do this with Netview...and if not, what are people
using to do it?  Lots of cron scripts?


Anybody using this?  Netview seems to speak nothing of it and I'm not
sure if it's worth purusing.

TIA for any advice or insight!


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