AW: problem with router cisco 2514

2000-06-19 07:58:36
Subject: AW: problem with router cisco 2514
From: FITZINGER Richard <richard.fitzinger AT it-austria DOT com>
To: nv-l AT lists.tivoli DOT com
Date: Mon, 19 Jun 2000 13:58:36 +0200

if your router is configured for CDP Netview V6 will not question for the
ARP table. but what Netview does in ANY case is to question your
IpNetMediaTable (to be exact: four variables, each for every instance). it
asks for it ONCE every automatic scheduled "config poll" or "new node poll".
if you "demand poll" via the menu function or via command-line
"nmdemandpoll" Netview will ask for that table TWICE (because its kind of a
combination of "demand poll" and "config poll"). 

i guess your problem is a large ipNetToMedia table. check it with your MIB

what you can do now is:
- avoid manual "demand poll" as far as possible
- set "config poll" and "new node poll" via "options -> SNMP configuration"
to a large interval. i think, once netview has discovered your router you
should not need to schedule "demand poll" or "config poll" until you change
the router's config.

by the way: i have seen Cisco routers going up to 99 % CPU by demand polling
them. i think it is not proven that the router then has a real problem.
maybe it is using its CPU for SNMP because the ressources are just there?

regards, richard

Richard Fitzinger


A-1020 Wien, Lassallestr.5
Telefon: (+43 1) 21717-58944
Telefax: (+43 1) 21717-58979
mailto: richard.fitzinger AT it-austria DOT com

-----Ursprüngliche Nachricht-----
Von: BAUDOUX BERNARD [mailto:bernard.baudoux AT FORTISBANK DOT COM]
Gesendet: Montag, 19. Juni 2000 09:18
An: 'IBM NetView Discussion'
Betreff: RE: [NV-L] problem with router cisco 2514

Hello Mauricio,

This question has indeed already been discussed in this Forum.
The problem is presumably that your 2514 has big ARP caches or other huge
tables and when your router dumps these tables to netmon, this consumes lots
of cpu resources.
Is this router the default gateway of many users (this would explain a huge
ARP cache) ?

I have read on this forum that NetView V6 was managing this better (by
taking advantage of the CDP)

Maybe you can search the Forum archives to get some pointers to this topic.

Hope this helps you a bit,
Bernard Baudoux
* : 02/56(88).524.68
* : 1GA2H
e-mail : bernard.baudoux AT fortisbank DOT com

> -----Original Message-----
> From: SABENA Mauricio DICEI [SMTP:BAIMAS AT techint DOT net]
> Sent: Friday, 16 June, 2000 22:57
> To:   'nv-l AT tkg DOT com'
> Subject:      [NV-L] problem with router cisco 2514
> Hello all.
> I´m a new suscriber. First of all I would like to apologise for my
> rudimentary english.
> We have Netview 5.1.1 and Netview 6.
> The problem is that the SNMP daemon uses 50 or 60 percent of the router
> cpu
> when a demand poll is made in a Cisco 2514 ver 11.2(18).
> I don´t have this problem with others routers.
> I´ll be gratefull with any idea.
> Thanks.
> Mauricio E. Sabena
> Organización Techint
> baimas AT techint DOT net
> _________________________________________________________________________
> NV-L List information and Archives: http://www.tkg.com/nv-l

<Prev in Thread] Current Thread [Next in Thread>
  • AW: problem with router cisco 2514, FITZINGER Richard <=