Information Technology Reference
In-Depth Information
Can VLANs in Different VTP Domains Have the Same Name?
You can have VLANs with the same name, provided that other characteristics, such as VLAN Index and
SAID value, are also identical. Discrepancies occur when there are identically named VLANs with other
attributes that are different (such as index and so on). If the two VLANs share identical definitions, no
discrepancy is detected.
Can You Drag Ports from One VLAN to Another on VTP Transparent Switches?
Attempting to drag a port to a VLAN may or may not work, depending upon the definition of that
particular VLAN on both the VTP server and the transparent switch. If the definitions are identical
(including name, VLAN index, and so on), the dragging process will probably work fine. However, if
the definitions are not identical, then the results are undefined: The process may or may not work.
Therefore, to add VTP transparent switches to the same VLANs that are running on the VTP server, you
must ensure that the VLAN definitions are consistent.
Will VlanDirector Display VLAN Information for a Switch That Is in Transparent Mode?
The VlanDirector application does not discover any VLANs configured on a switch in transparent mode.
Thus, if the VLAN state of a transparent switch differs from the state reported by a server in the same
domain, the VlanDirector application will not properly handle VLAN changes to the transparent switch.
Why Is the Switch Highlighted When Any VLAN Is Selected?
In the VlanDirector application, you can select a VLAN, and the switches associated with that VLAN
are highlighted on the CWSI Campus map. You can also highlight a switch in the CWSI Campus map to
indicate which VLANs are active on that switch. However, if the switch has trunks that carry all VLANs,
then the switch will be highlighted, regardless which VLAN you select.
Why Is There a Lighting Bolt on the Port?
The lightning bolt on a port means that the port is part of a link (either a device-to-device link or a
connection into a shared media).
The lightning bolt is used to differentiate between a port that is connected to another switch (linking)
and a port that is configured as a user port. Cisco Discovery Protocol (CDP) has discovered a CDP peer
out of this port.
The bolt indicates that you cannot manipulate the port for VLAN configuration by itself; you must
configure it as part of its corresponding link. You do this by selecting the link from the CWSI Campus
map and dragging the link to the appropriate VLAN.
