Table of Contents
Advertisement
Chapter 1: Virtual Local Area Networks
(FIDs) security can be implemented to enable or prevent users from one
or more VLANs from communicating with each other.
One or more VLANs can be assigned to a FID so that all the users that are
members of the VLANs of a FID can communicate with each other
regardless of their VLAN affiliation. However, for the sake of security, the
members of one FID cannot communicate with the members of another
FID.
In order to set up a VLAN, all the network switch devices that are
assigned to the VLAN must support the draft standard IEEE 802.1Q
specification for VLANs. Before you attempt to implement a VLAN
strategy, ensure that the switches under consideration support the IEEE
802.1Q specification.
1.4
VLAN TERMS
To fully understand the operation and configuration of port based VLANs,
it is essential to understand the definitions of several key terms.
VLAN ID
A unique number (between 1 and 4094) that identifies a particular VLAN.
VLAN Name
A 32-character alphanumeric name associated with a VLAN ID. The
VLAN Name is intended to make user-defined VLANs easier to identify
and remember.
Filtering Database ID (FID)
Addressing information that the device learns about a VLAN is stored in
the filtering database assigned to that VLAN. Several VLANs can be
assigned to the same FID to allow those VLANs to share addressing
information. This enables the devices in the different VLANs to
communicate with each other when the individual ports have been
configured to allow communication to occur. The configuration is
accomplished using the Local Management VLAN Forwarding
1-4
802.1Q VLAN User's Guide
Advertisement
Table of Contents
