Cisco Systems Dial NMS manual About Discovery Filters, Select Automatic Layout

Task 7—Using HP OpenView to Create the SNMP Framework

About Discovery Filters

To manually re-structure device maps to adequately represent your network and turn off the automatic-layout function for the top-level map, follow these steps:

Step 1 Re-structure the top-level map by selecting and moving device icons. For example, put a collapsed backbone in the center of the map; then, position devices around the backbone.

Figure 32 Top-Level Map Adjustments

Step 2	Go to View.
Step 3	Select Automatic Layout.
Step 4	Choose Off For This Submap.

About Discovery Filters

A discovery filter is an ASCII file that HPOV reads to limit the discovery of devices on the network.

Use a discovery filter to:

•Define the subnets and devices you want to monitor.

•Avoid managing PCs and other non SNMP devices on the network.

Sometimes HPOV discovers too many devices. If HPOV discovers devices beyond your target network, such as the entire Internet, the performance of the Unix host decreases significantly. If the device maps begin filling up with networks, routers, and other devices that do not belong to you, use a discovery filter.

Basic Dial NMS Implementation Guide

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