Configuring VLANs
Section 9. Configuring VLANs
VLANs are logical subgroups with a Local Area Network (LAN) which combine user stations and network devices into a single unit, regardless of the physical LAN segment to which they are attached. VLANs allow network traffic to flow more efficiently within subgroups. VLANs use software to reduce the amount of time it takes for network changes, additions, and moves to be implemented.
VLANs have no minimum number of ports, and can be created per unit, per device, or through any other logical connection combination, since they are
VLANs function at Layer 2. Since VLANs isolate traffic within the VLAN, a Layer 3 router working at a protocol level is required to allow traffic flow between VLANs. Layer 3 routers identify segments and coordinate with VLANs. VLANs are Broadcast and Multicast domains. Broadcast and Multicast traffic is transmitted only in the VLAN in which the traffic is generated.
VLAN tagging provides a method of transferring VLAN information between VLAN groups. VLAN tagging attaches a
Combining VLANs and GARP (Generic Attribute Registration Protocol) allows network managers to define net- work nodes into Broadcast domains.
This section contains the following topics:
•Defining VLAN Properties
•Defining VLAN Membership
•Defining VLAN Interface Settings
•Defining Private VLANs
•Configuring GARP
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