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802.1Q VLAN User’s Guide iii
CONTENTS
Figures ....................................................................................................vii
Tables..................................................................................................... viii
PREFACE
Using This Guide............................................................................ix
Structure of This Guide...................................................................ix
Related Documents.........................................................................x
Document Conventions ...................................................................x
CHAPTER 1 VIRTUAL LOCAL AREA NETWORKS
1.1 Defining VLANs ........................................................................... 1-1
1.2 Types of VLANs........................................................................... 1-3
1.2.1 802.1Q VLANs................................................................ 1-3
1.2.2 SecureFast VLANs ......................................................... 1-3
1.2.3 Other VLAN Strategies ................................................... 1-3
1.3 Benefits and Restrictions.............................................................1-4
1.4 VLAN Terms................................................................................ 1-4
1.5 Getting Help................................................................................. 1-7
CHAPTER 2 VLAN OPERATION
2.1 Description................................................................................... 2-1
2.2 VLAN Components......................................................................2-1
2.3 Configuration Process ................................................................. 2-2
2.3.1 Defining a VLAN ............................................................. 2-2
2.3.2 Classifying Frames to a VLAN........................................ 2-2
2.3.3 Customizing the VLAN Forwarding List .......................... 2-3
2.4 VLAN Switch Operation...............................................................2-3
2.4.1 Receiving Frames from VLAN Ports............................... 2-4
2.4.2 Forwarding Decisions ..................................................... 2-5
2.4.2.1 Broadcasts, Multicasts, and Unknown
Unicasts.......................................................... 2-5
2.4.2.2 Known Unicasts.............................................. 2-5
2.5 GARP Switch Operation.............................................................. 2-6