HP Network Direr Software Products manual Monitors event will be generated, Destination

304CHAPTER 7: MONITORING THE NETWORK

Changing Retry Depending upon the topology and geographical distribution of your Periods and Timeouts network, access to some portions of your network may be slower or less

reliable than to other portions of your network.In particular, traffic to and from remote sites may be carried over slow WAN links.

If communications with a portion of your network are particularly slow or unreliable this may result in a loss of data. This may be due to either 3Com Network Director not giving the devices on that portion of the network enough time to respond, or the traffic being discarded by the network.

If monitoring data is not received in time, or is lost, then 3Com Network

Director may assume incorrectly that there are problems on your network.

3Com Network Director avoids this by allowing you to configure the retry periods and timeouts for all traffic that it generates.

The mechanism for changing these settings is discussed in “Using 3Com

Network Director On A Multi-Site Network” on page 681.

Controlling Event 3Com Network Director uses monitors to generate events.If a monitor Generation from remains in a warning or high state for an extended period of time an

Monitors event will be generated.

The warning and high states for a monitor are determined from the setting of a threshold for the monitor.This threshold specifies the state that the monitor must reach to enter its high state.3Com Network Director then derives a warning state from the threshold.For further details on thresholds and how to change them see “Setting Thresholds for Monitor-Based Events” on page 356.

3Com Network Director also provides a set of features, collectively known as Smart Event Analysis, that work together to interpret the generated events.These features include mechanisms to prevent events from being generated when a monitor enters then immediately leaves an abnormal state, and to combine multiple identical events into a single recurring event.For further details see “Smart Event Analysis” on page 324.

Registering 3Com By default, 3Com Network Director will register itself as an SNMP trap Network Director as destination with any 3Com devices that it is monitoring.If you do not

an SNMP Trap wish 3Com Network Director to do this, uncheck the Automatically

Destination