User's Manual

516 CHAPTER 13: VLAN MANAGEMENT
■ only those devices and links on which the VLAN is explicitly configured
are highlighted e.g. in the figure above, only the switch and the two
links would be highlighted.
■ any devices which 3Com Network Director has inferred are members
of the VLAN are also highlighted e.g. in the figure above, 3Com
Network Director has inferred that the highlighted end-station is also
a member of the VLAN.
See “
Options Dialog Box” on page 521.
When you select a VLAN in the Show VLANs toolbar, the map view will
zoom to those devices and links that are members of the VLAN. For
example, if the map is currently displaying the contents of subnet A and
you select VLAN B in the Show VLANs toolbar, if there are no members of
VLAN B on subnet A and all members are instead in subnet B, the map
view will jump to subnet B.
On a large network that has a lot of VLANs defined, the best way to view
the VLANs on the map is to first remove the grouping of devices by
subnet, by unchecking the View > Group Map by Subnet menu option,
and then launch the Show VLANs toolbar.
Filter View button
The Filter View button on the Show VLANs toolbar behaves as follows:
■ If the button is depressed, the map view grays all devices that are not
part of the selected VLAN.
■ If the button is not depressed, the map view reverts to the normal
view.
■ The button behaves as a toggle, i.e. one click will cause the button to
become depressed, a subsequent click will cause it to pop out again.
The user can thus switch between the VLAN and non-VLAN map views
via single clicks of the Filter View button.
Interaction with Trace Path
The Trace Path and Show VLANs toolbars interact as follows:
■ Both toolbars can be visible and active simultaneously.
■ Devices are shown grayed on the map if they are grayed by either the
Show VLANs toolbar or the Trace Path toolbar.