User's Manual

298 CHAPTER 7: MONITORING THE NETWORK
The use of monitoring mode in distributed networks is discussed in
section on monitoring mode in “
Using 3Com Network Director On A
Multi-Site Network” on page 681
Poll Rate
Active monitors poll the devices in your network to obtain the data they
require to calculate the monitor state.The higher the poll rate used, the
more traffic this will generate on your network.This may be of particular
concern if you are monitoring remote devices and have limited
bandwidth to monitor them over.
By reducing the poll rate you can reduce the amount of traffic collected
without changing the monitoring mode.However, by polling less
frequently any peaks in the monitor value will be averaged out more, and
so it reduces the level of information that a monitor may provide.
At the whole map and subnet level it is possible to specify two different
poll rates, one for core devices, such as routers, switches and hubs, and
one for non-core devices, such as end stations.
It is not possible to change the poll rates when automatic monitoring
mode is used. 3Com Network Director will automatically configure the
poll rates based upon the number of devices in the map.
The use of poll rate in distributed networks is discussed in “
Using 3Com
Network Director On A Multi-Site Network” on page 681.
Specifying Monitoring Mode and Poll Rates at the Whole Map
Level
To change the monitoring type and poll rate settings for the whole map,
open the Monitoring tab of the Tools > Options dialog box: