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3
V
IRTUAL
LAN C
ONCEPTS
This chapter provides a brief overview of
Virtual LAN (VLAN)
concepts, and describes how to
extend VLANs into the ATM network.
This user guide does not describe how to create or
configure VLANs. VLAN configuration is described in
the user guide that accompanies your Switch.
What is a Virtual LAN (VLAN)?
A
Virtual LAN (VLAN)
is a flexible, location and topology
independent group of end-stations communicating as
if they are on a common physical LAN.
You can create VLANs that closely correspond to how
your network and business functions. For example,
marketing personnel in different physical locations
could be part of one VLAN and finance personnel
could be in another VLAN.
VLANs provide the following benefits:
■
VLANs make moves and changes simple.
■
As each VLAN is a common broadcast domain, you
can erect firewalls against broadcast storms.
■
VLANs improve security.
For a full description of VLAN functionality, refer to
the user guide that accompanies your Switch.
Creating Inter-switch VLANs
You can create inter-switch VLANs using
Virtual LAN
Trunks (VLTs)
on Fast Ethernet connections, as shown
in Figure 3-1.
Figure 3-1
Inter-switch VLANs
Summary of Contents for OPTIONS ATM OC-3c
Page 1: ...8271 Nways Ethernet LAN Switch ATM OC 3c Module User s Guide...
Page 6: ......
Page 10: ...4 ABOUT THIS GUIDE...
Page 23: ...Asynchronous Transfer Mode ATM Layer 2 11 Figure 2 7 Switching Cells using VPI and VCI values...
Page 28: ...2 16 CHAPTER 2 NETWORK LAYER CONCEPTS...
Page 31: ...Extending VLANs into the ATM Network 3 3 Figure 3 3 Extending VLANs into the ATM Network...
Page 32: ...3 4 CHAPTER 3 VIRTUAL LAN CONCEPTS...
Page 39: ...Campus Configuration 5 3 Figure 5 2 Campus and Cost Sensitive Network...
Page 50: ...7 2 CHAPTER 7 ACCESSING MANAGEMENT FEATURES Figure 7 1 Screen Map...
Page 80: ...9 14 CHAPTER 9 MONITORING THE ATM MODULE...
Page 87: ...Safety Notices A 7 IEC 950 SELV SELV...
Page 88: ...A 8 APPENDIX A SAFETY INFORMATION...
Page 90: ...B 2 APPENDIX B SCREEN ACCESS RIGHTS...
Page 94: ...C 4 APPENDIX C ATM MODULE TECHNICAL SPECIFICATIONS...
Page 98: ...D 4 APPENDIX D TROUBLESHOOTING Figure D 1 Troubleshooting Flow Diagram...
Page 120: ...E 2 APPENDIX E TECHNICAL SUPPORT AND SERVICE...
Page 136: ...2 BIBLIOGRAPHY...
Page 140: ...4 INDEX...