3Com 3C15500 - Network Director - PC, User Manual

Page: 127 / 924

Components 123
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RADIUS servers
■
SNMP-enabled servers
Only IP devices As described in the “Key Concepts” section on
page 92 , the topology part of discovery can result in MAC-only nodes
being created as a result of the information read from bridge FDB tables.
By selecting this option this behavior is disabled.
This option will be most effective if you have segregated your devices
such that:
■
Connecting devices and important IP devices are within a certain IP
range on each subnet.
■
The remaining devices are within another range.
■
Connecting devices and important IP devices are on different subnets
from the remaining devices.
This way you can use the range specification or the list of subnets to
discover respectively, along with this option, to eliminate unimportant
end stations.
All devices Selecting this option will result in all devices detected
during discovery and topology being added to the map.
Rediscovery operations never result in devices being removed from an
existing map (unless two nodes have been merged into one). If you have
a subnet which contains MAC-only devices, and rediscover it with
Only
core devices selected, then only core devices will be rediscovered, but any
existing non-core devices in the subnet will remain in the subnet.
If there is a subnet in your map that contains unwanted devices that
would be filtered out by the
Only core devices or Only IP devices options
then you can remove these devices from your map by first deleting the
subnet from the map and then discovering it afresh in the
Network
Discovery wizard, selecting the appropriate option in this wizard pane.
See “Deleting Items from the Map” on page 204 for details of how to
delete a subnet.
Note, however, that refreshing a subnet in this manner will also lose any
changes you may have made to the map in this subnet (such as manual
changes to the topology or setting the
Custom Name of a device).