HP Network Direr Software Products manual Determining Monitoring Modes and Poll Rates

706CHAPTER 17: USING 3COM NETWORK DIRECTOR ON A MULTI-SITE NETWORK

case of the SNMP traps only mode, removes the polls entirely), but at the cost of the detail of the monitoring information.

For example, full monitoring of a complex device may involve retrieving state for several hundred monitors during every poll. By changing to response monitoring mode you will reduce the number of monitors that state is retrieved for to one (the IP Ping Service monitor), vastly reducing the amount of traffic generated by the monitoring of that device. However, 3Com Network Director will no longer be able to monitor links using that device, will not be able to show you the state of, or generate events based upon, any monitor other than the IP Ping Service monitor on that device and will only be able to show response times in any historical reports generated for the device.

Details of how to configure the monitoring modes used across your network are provided in “Controlling Monitoring Type and Polling Rates” on page 296.

Disable individual monitors. If you are monitoring a device in full monitoring mode and there are one or more monitors that you are not interested in then you can disable those monitors. Doing so will stop 3Com Network Director from retrieving the data for those monitors and so will reduce the amount of traffic generated across the WAN link by each poll for that device, but at the cost of the detail of the monitoring information.

For example, if you are not interested in the errors on an Ethernet link between two devices located at the same remote site then you can disable the Ethernet Link Error Rate monitor, which will reduce the amount of traffic generated by the monitoring of that link. However, 3Com Network Director will no longer be able to show you the state of, or generate events based upon, the Ethernet Link Error Rate monitor on that link, and will not be able to show errors in any historical reports generated for the link.

Details of how to disable individual monitors are provided in “Disabling and Enabling Individual Monitors” on page 294.

Determining Monitoring Modes and Poll Rates

By default 3Com Network Director will apply the automatic monitoring mode to your whole map. This monitoring mode automatically selects the devices that 3Com Network Director considers to be the most important in your network and uses full monitoring for those devices and