Re: SNMP Traffic with NetView

2001-12-17 14:31:55
Subject: Re: SNMP Traffic with NetView
From: "Les Dickert" <lesdickert AT hotmail DOT com>
To: nv-l AT lists.tivoli DOT com
Date: Mon, 17 Dec 2001 14:31:55
One thing we do to reduce SNMP traffic and router
overhead is to turn off NetView discovery and
configuration polling during the day.  We turn it
on at night, and sometimes only when we are told
that the network has changed.  Easy to do and
helps a lot.

Les Dickert
Verisign Consulting

>From: "James Shanks" <jshanks AT us.ibm DOT com>
>Reply-To: IBM NetView Discussion <nv-l AT tkg DOT com>
>To: IBM NetView Discussion <nv-l AT tkg DOT com>
>Subject: Re: [NV-L] SNMP Traffic with NetView
>Date: Mon, 17 Dec 2001 09:05:21 -0500
>Maxine -
>I don't do netmon and I don't know its intimate details so I cannot answer
>your question the way you would like.
>But you can adjust the new node polling interval and the configuration
>check poll of a node using xnmsnmpconf.
>That is your only interface into how netmon handles SNMP anyway.
>Why not just pick a target and see if adjusting the intervals gets you
>what you want?
>I would also read the help  and the documentation provided on these
>Offhand, in my opinion for what it is worth,  I would say that netmon must
>read  the iprouteIfindex and Ipnettomediaaddress in order to determine if 
>anything on this router has changed, so it has to
>be part of some kind of configuration check.  But if you have unnumbered
>serial interfaces on that router, then there is no other way to determine
>their status, except by SNMP, is there?  And that is what netmon does when
>you have such interfaces, is check the entire
>router by SNMP, or so I am told.  Finally, I would remind you that NetView
>is designed to be an SNMP manager.  There is no point in having it if you
>don't want your devices to respond to SNMP.  Routers must or they cannot
>be effectively managed.
>James Shanks
>Level 3 Support  for Tivoli NetView for UNIX and NT
>Tivoli Software / IBM Software Group
>Maxime TRANNOY/France/Contr/[email protected]
>Sent by: owner-nv-l AT tkg DOT com
>12/17/2001 06:57 AM
>Please respond to IBM NetView Discussion
>         To:     IBM NetView Discussion <nv-l AT tkg DOT com>
>         cc:
>         Subject:        [NV-L] SNMP Traffic with Netview
>I use a Netview to monitor network devices. i want to reduce the SNMP
>traffic between the Netview and my SNMP devices.
>Is it possible to have an ICMP monitoring with a polling intervall of 5
>minutes and an SNMP polling intervall of 15 or more minutes?
>By looking closer to the SNMP traffic Between the SNMP devices and the
>Netview i have seen that 80% of the traffic are only used to read two kind
>of variables iprouteIfindex mib part and Ipnettomediaaddress mib part.
>Why is it usefull to have this kind of information?
>Is it not possible to reduce the SNMP traffic by checking a part of the
>MIB Only?
>Why does Netview check this two mibs. Is to check for the interface state
>is it for matter of auto discovery.
>Thanks in advance for your answer
>Kind regards/Cordialement.
>IGS - Network Delivery Support Center
>Tel : +33 (0) 492 114 767
>mailto:mtrannoy AT fr.ibm DOT com
>NV-L List information and Archives: http://www.tkg.com/nv-l

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