User's Manual

Configuration 711
can be discovered. See “Specify Subnets Pane” on page 111 for
details of how to do this.
■ It is possible to configure the numbers of retries and timeout periods
to use for each subnet being discovered. See “
Specifying Retries and
Timeout Periods in the Network Discovery Wizard” on page 700 for
details of how to do this.
■ If automatic monitoring mode is not being used then the monitoring
mode to use for the subnets being discovered can be specified. See
“
Specifying Monitoring Mode in the Discovery Wizard” on page 302
for details of how to do this.
■ The types of devices to discover can be restricted to only core devices
or only IP devices. See “
Discovery Options Pane” on page 122 for
details of how to do this.
The appropriate use of the numbers of retries and timeout periods in a
multi-site network are discussed in “
Configuring Retries and Timeout
Periods” on page 694, while the appropriate use of monitoring modes in
a multi-site network is discussed in “
Configuring Monitoring Modes and
Poll Rates” on page 705.
The remaining two options allow you to filter which devices are
discovered by the network discovery process by restricting the Network
Discovery process to certain important subnets, ranges on those subnets
that contain important devices and devices of a specific type.
Controlling the Network Discovery process in this manner reduces the
total number of devices represented in the map.
Devices containing large numbers of devices can be complex to navigate.
By filtering out devices that you are not interested in monitoring or
managing on a day-to-day basis, or that are not your direct responsibility,
you can simplify navigation.
In addition, 3Com Network Director has a limit of 5,000 devices within a
single map. If you have a large network then it may not be possible to
display all of the important devices in a single map unless you filter out
those devices that are less important to you.
Reduces the total amount of traffic generated by the Network Discovery
process.