User's Manual

Components 113
Figure 32 Add Range Dialog Box
This allows you to enter the start and end IP addresses of the range to
detect.
To discover a single IP address on a subnet, add a range with the same
start and end IP address.
An existing range can be modified by selecting the range and clicking
Edit. This will display the same dialog box as for adding subnets,
described above, with the Start and End fields completed with the
information you originally supplied. Modify the fields as necessary and
select OK to update the range.
To remove ranges from being detected, select the ranges and click Delete.
Removing discovered ranges from the list, or modifying discovered ranges
so that previously detected IP addresses will not be detected, does not
remove them from the map, but simply removes them from the list of
ranges to rediscover when the Network Discovery is started. The ranges
will remain in the map but will be unchanged by the Network Discovery
process. See “
Deleting Items from the Map” on page 204 for details of
how to remove devices permanently from the map.
The Retry/Timeout information section of this dialog box allows you to
control how long 3Com Network Director waits for a response from a
device for the different protocols it uses during discovery and how many
times it will retry if it fails to get a response. See “
Key Concepts” on
page 92
for how the different protocols are used. The use defaults option
is checked by default so that the global settings will be used from the
Options dialog box. If you uncheck this, the retry/timeout fields become
enabled so that you can modify them for this specific subnet. You may
wish to change these values from the global default if the subnet you are