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SWITCHING

EXCELLENT

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GUESTBOOK

26. Describe LAN segmentation using switches

A virtual LAN (VLAN) logically segments a switched network based on an organization's functions, project teams, or applications rather than on a physical or geographical basis.

Reasons to use VLANs

• Assignments are logically, not geographically, based
• Keep up with moves and changes
• Group multiple topologies
• VLANs offer network security
• VLANs offer broadcast control
• Bandwidth utilization is efficient

Wrong motives implementing VLANs

• It will simplify my life as network manager
• VLANs will eliminate layer 3 issues
• Monitoring the network will be easier

Two basic methods to define VLAN boundaries

1. End-to-end VLANs
2. Local VLANs

Two common approaches to assign VLAN membership

1. Static VLANs
2. Dynamic VLANs

Route Switch Module (RSM) uses the switch backplane providing 2 key benefits:

1. Speed
2. Integration