HP Network Direr Software Products manual Monitoring Mode

296CHAPTER 7: MONITORING THE NETWORK

Controlling Depending upon the topology and geographical distribution of your Monitoring Type and network, regular polling of some segments of your network may cause

Polling Rates more network traffic than is desirable.In order to address this, 3Com Network Director allows you to control the amount of traffic generated on your network by the monitors.There is a three level hierarchy in this mechanism:

■Whole Map: The Monitoring tab in the Tools > Options dialog box allows you to control the traffic generated by monitoring for the whole map.Unless you explicitly override the settings at the subnet or device level, devices will use the settings you specify here.

■Subnet: The Monitoring tab in the Properties dialog box for a subnet allows you to override the whole map settings for a particular subnet and so control the traffic generated by the monitoring of devices within that subnet.Unless you explicitly override the settings at the device level, devices within the subnet will use the settings you specify here.

■Device: The Monitoring tab in the Properties dialog box for a device allows you to override the whole map and, if applicable, subnet settings for a particular device, and so control the traffic generated by the monitoring of that device.

Unless explicitly overridden at the device level, devices that appear in more than one subnet, such as routers and layer-3 switches, inherit the whole map settings directly rather than inheriting them from one of their subnets.

The mechanism allows you to control two sets of parameters at each level: the monitoring mode and the monitor poll rate.

Monitoring Mode

There are various ways in which 3Com Network Director can monitor your network, each of which generates a different amount of network traffic.By selecting different monitoring modes you can control the amount of generated traffic.There are four basic monitoring modes that are supported:

Full Monitoring: When a device is monitored using full monitoring mode all of the monitors for the device are enabled.This monitoring mode provides the most monitoring information for a device and allows you to monitor links using that device, but generates the most traffic.