vlans
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TRANSCRIPT
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CCNA 3 Chapter 9
Virtual LANs
By
Your Name
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Objectives
• VLAN concepts
• VLAN configuration
• Troubleshooting VLANs
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VLANs
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VLANs
VLANs logically segment switched networks based on an organization's functions, project teams, or applications as opposed to a physical or geographical basis.
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Broadcast Domains with VLANs and Routers
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Broadcast Domains
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Static VLANs
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Dynamic VLANs
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Port-Centric VLANs
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VLAN Configuration
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Benefits of VLANs
• Easily move workstations on the LAN• Easily add workstations to the LAN• Easily change the LAN configuration• Easily control network traffic• Improve security
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VLAN Types
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VLAN Tagging
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Communicating Between VLANs
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VLAN Configuration
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Concurrent Transmission
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End-to-End VLANs
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Static VLANs
• Moves are controlled and managed. • There is robust VLAN management software
to configure the ports. • It is not desirable to assume the additional
overhead required when maintaining end-station MAC addresses and custom filtering tables.
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Verifying VLAN Configuration
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Saving a VLAN Configuration
Back up using the copy running-config tftp command, or you can use the HyperTerminal Capture Text feature to store the configuration settings.
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Deleting VLANs
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Troubleshooting VLANs
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VLAN Problem Isolation
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Problem Isolation in Catalyst Networks
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Preventing Broadcast Storms
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Troubleshooting VLANs
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Keyword Syntax
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The show Commands
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VLAN Troubleshooting Scenarios
Cannot establish a trunk link between a switch and a router
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VLAN Troubleshooting Scenarios
VTP is not properly propagating VLAN configuration changes.
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VLAN Troubleshooting Scenarios
Dropped packets and loops