ccna 3 v3.0 module 5 switches
DESCRIPTION
CCNA 3 v3.0 Module 5 Switches. Objectives. LAN design LAN switches. LAN Design Goals. Functionality Scalability Adaptability Manageability. LAN Design Considerations. The function and placement of servers Collision - detection issues Segmentation issues Broadcast domain issues. - PowerPoint PPT PresentationTRANSCRIPT
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LAN Design Goals
• Functionality
• Scalability
• Adaptability
• Manageability
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LAN Design Considerations
• The function and placement of servers
• Collision-detection issues
• Segmentation issues
• Broadcast domain issues
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LAN Design Methodology
• Gather requirements and expectations
• Analyze requirements and data
• Design the Layer 1, 2, and 3 LAN structure, or topology
• Document the logical and physical network implementation
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Extended Star Topology in a Multi-Building Campus
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Use Routers to Impose Logical Structure
Routers provide scalability because they serve as firewalls for broadcasts. They can also provide scalability by dividing networks into subnetworks, or subnets, based on Layer 3 addresses.
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Access Layer
• Functions of the Access Layer:
Shared Bandwidth
Switched Bandwidth
MAC Layer Bandwidth
Microsegmentation
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Access Layer Switches
• Catalyst 1900 series
• Catalyst 2820 series
• Catalyst 2950 series
• Catalyst 4000 series
• Catalyst 5000 series
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Distribution Layer
• In a switched network, the distribution layer includes several functions such as the following:
Aggregation of the wiring-closet connections
Broadcast/multicast domain definition
VLAN routing
Any media transitions that need to occur
• Copper to fiber
Security
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Distribution Layer Switches
Cisco Catalyst 2926G
Cisco Catalyst 6000 Family<not pictured>
Cisco Catalyst 5000 Family
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Core Layer
The core layer is a high-speed switching backbone. The core layer should be designed to switch packets as fast as possible.