Cisco Systems Dial NMS manual Setting Up and Editing a Discover y Filter

Task 7—Using HP OpenView to Create the SNMP Framework

About Discovery Filters

After a filter is set up, HPOV will not discover devices unless they are defined by the filter. Edit the filter each time a new device is added to the network.

For more information about discovery filters, go to http://www.openview.hp.com

Setting Up and Editing a Discover y Filter

The filter file is located in the /etc/opt/OV/share/conf/C directory. A sample file is shown in the following step-by-step example. The file has been manually edited and abbreviated to include a specific node list and filter list for this case study:

•Node list—A list of specific devices. In the example, the list is called TheNetNodes. There are two devices in the list: AS5800-1 and AS5800-2.

•Filter list—A list of attributes for the specified devices. In the example, the list is called TheNetFilters, which specifies the filtering attributes for the devices in the node list. For example, all devices must be SNMP compliant and Cisco devices.

To see a complete filter file, go to

http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/dialnms/filter.txt

To set up and edit a discovery filter, follow these steps:

Step 1 Find the filters file on your Unix workstation:

aurora:/etc/opt/OV/share/conf/C ->ls

filters oid_to_sym trapd.conf

Step 2 Edit the filters file by using a text editor to include a node list and a filter list for your network environment:

aurora:/etc/opt/OV/share/conf/C ->vi filters

//

//@(#)$OV_CONF/$LANG/filters

//@(#)HP OpenView NNM Release B.05.01 Jun 21 1997

//@(#)Copyright (c) 1990-1997 Hewlett-Packard Company

//$Revision: /main/TORNADO/NNM_NT/5 $ $Date: 1997/01/13 19:35 UTC $

//This is the default filter file. These filters are examples

//which may be useful in your environment. Feel free to modify

//these filters and/or add your own. See OVfilterIntro(5)

//for more information on this file.

//NOTE: The behavior of topology filters in a distributed environment

//changed as of DFIX 5027. This file documents the behavior as of that

//patch level. This should be considered the correct specification of

//how topology filtering behaves in a distributed environment.

//

//Sets are a simple way to list string values to test

//against in a filter. The "IN" operator tests a field value

//for membership in a set defined here.

//

Sets {

//

//These are simple examples of sets.

servers "Set of Servers" { "sv1", "sv2", "sv3" } gateways "Backbone gateways " { "gw1", "gw2", "gw3" }

TheNetNodes "TheNet Node List" { "AS5800-1", “AS5800-2" }

Basic Dial NMS Implementation Guide

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