HP Network Direr Software Products manual Configuration

Configuration 709

Monitoring local devices does not involve the use of WAN links, and so these can use more frequent polling rates than remote devices, providing a more accurate picture of the state of these devices.

Similarly, remote devices that you monitor in response monitoring mode generate less traffic at each poll than devices that you monitor in full monitoring mode. As a result, a remote site where most or all of the devices are monitored in response monitoring mode can be polled more frequently than one where most or all of the devices are monitored in full monitoring mode.

This means that, by carefully choosing a few select devices at a remote site that require full monitoring and using response monitoring for all other devices at that site, you can poll the devices at that site more frequently than otherwise would have been possible.

Unless they are critical servers, it is recommended that you do not monitor end stations at remote sites at all.

Issues and Techniques when Configuring Monitoring Modes and Poll Rates

Monitoring modes and poll rates are configured in 3Com Network Director using the same hierarchy as the Retry/Timeout settings. As a result, the things to bear in mind when configuring monitoring modes and poll rates in a multi-site network are similar to those encountered when configuring the Retry/Timeout hierarchy:

Before starting to configure the monitoring modes and poll rates hierarchy, it is important to correctly identify the local and remote sites with regards to the PC that 3Com Network Director is running on. Where possible, each site should be identified by the IP subnets that are unique to that site.

If you have determined that there are different monitoring mode and poll rate requirements for different devices within the same IP subnet then you will be unable to override the whole map settings at the subnet level such that you satisfy the requirements of all of the devices in that subnet. For example, you may have determined that the majority of the devices within a subnet that is located at a remote site should be monitored in response monitoring mode with 300 second polls for the core devices and 900 second polls for the non-core devices, while some of the more important devices in the subnet should be monitored in full monitoring mode with 120 second polls.