Enterasys Networks 6G3xx User Guide

The VLAN to which all ports are assigned upon initialization. 
The Default VLAN has a VLAN ID of 1 and cannot be deleted or 
renamed.

A list of the ports on a particular device that are eligible to 
transmit frames for a selected VLAN. 

A per port list of all eligible VLANs whose frames can be 
forwarded out one specific port and the frame format (tagged or 
untagged) of transmissions for that port. The Port VLAN List 
specifies what VLANs are associated with a single port for frame 
transmission purposes.

A database structure within the switch that keeps track of the 
associations between MAC addresses, VLANs, and interface 
(port) numbers. The Filtering Database is referred to when a 
switch makes a forwarding decision on a frame.

1Q Connection 
(previously referred to as a 
1Q Trunk)

A connection between 802.1Q switches that passes only traffic 
with a VLAN Tag Header inserted in each frame. All VLANs in 
the port’s Port VLAN List are configured to transmit all frames 
as tagged frames. The port will drop all incoming frames that do 
not have a VLAN tag.

This is a reference to a connection from a switch that passes only 
untagged traffic. By default, a port designated to pass only 
untagged frames has all VLANs on its Port VLAN List and is 
configured to transmit all frames as untagged frames.

NOTE: The user cannot configure an interface to 
receive only untagged frames.

A protocol used to create a separate Spanning Tree topology for 
each VLAN configured in a switch. 

A protocol that is compatible with PVSTP and provides 
automatic topology changes at 1/10th the speed of PVSTP. 
QCSTP is also backwards compatible with IEEE 802.1D.