User Guide

Components 517
■ This reflects what the you would expect - if you ask for a Trace Path
view and a VLAN at the same time then you will only see devices that
are both in the traced path and part of the VLAN.
However, note that with both views active, Trace Path will not show the
path or paths between devices based on the currently viewed VLAN.
Trace Path only shows the path or paths based on the physical
connectivity of the network, and not based at all on VLAN or L3
information.
Refer to “
Trace Path” on page 188 for additional information on this
topic.
Maps with no VLAN information
If the current map contains no VLAN information, when the Show VLANs
menu option is selected a message will be displayed saying: This map
contains no VLAN information. The Show VLANs toolbar will not be
displayed.
This can occur for several reasons:
■ The map was originally created using a version of 3Com Network
Supervisor earlier than v3.5.
■ There are in fact no VLANs configured on the network at all. For
example, if the network contains only VLAN-unaware devices such as
hubs and traditional routers.
■ The only VLANs on the network are configured on non-3Com devices.
3Com Network Director does not read VLAN information from
non-3Com devices.
If all switches only have the one default VLAN configured, then the
following message is displayed: There are no VLANs configured on this
network, other than the default VLAN with VLAN ID = 1. As VLANs are
not actively being used on this network, the Show VLANs toolbar is not
shown.
VLAN names
In the Show VLANs toolbar, the textual description used to refer to a
VLAN generally has the following format:
name (ID=xxxx)