CCNA 3 Chapter 6 Switches By Your Name
CCNA 3 Chapter 6 Switches By Your Name Copyright 2003 www. ciscopress. com
Objectives • LAN design • LAN switches Copyright 2003 www. ciscopress. com
LAN Design Goals • Functionality • Scalability • Adaptability • Manageability Copyright 2003 www. ciscopress. com
LAN Design Considerations • The function and placement of servers • Collision-detection issues • Segmentation issues • Broadcast domain issues Copyright 2003 www. ciscopress. com
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 Copyright 2003 www. ciscopress. com
Layer 1 Design Copyright 2003 www. ciscopress. com
Typical MDF in Star Topologies Copyright 2003 www. ciscopress. com
Layer 1 Documentation Copyright 2003 www. ciscopress. com
Layer 2 Design Copyright 2003 www. ciscopress. com
LAN Topology Copyright 2003 www. ciscopress. com
Microsegmentation Copyright 2003 www. ciscopress. com
Asymmetric Switching Copyright 2003 www. ciscopress. com
Layer 3 Design Copyright 2003 www. ciscopress. com
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. Copyright 2003 www. ciscopress. com
Physical Network Maps Copyright 2003 www. ciscopress. com
VLAN Communication Copyright 2003 www. ciscopress. com
LAN Switches Copyright 2003 www. ciscopress. com
Access Layer Shared bandwidth Switched bandwidth MAC layer bandwidth Microsegmentation Copyright 2003 www. ciscopress. com
Access Layer Switches • • Catalyst 1900 series Catalyst 2820 series Catalyst 2950 series Catalyst 4000 series • Catalyst 5000 series Copyright 2003 www. ciscopress. com
Distribution Layer • Aggregation of the wiring-closet connections • Broadcast/multicast domain definition • VLAN routing • Any media transitions that need to occur Copyright 2003 • Security www. ciscopress. com
Distribution Layer Switches • Catalyst 2926 G • Catalyst 5000 family • Catalyst 6000 family Copyright 2003 www. ciscopress. com
Core Layer The core layer is a high-speed switching backbone. The core layer should be designed to switch packets as fast as possible. Copyright 2003 www. ciscopress. com
Core Layer Switches • • Catalyst 6500 series Catalyst 8500 series IGX 8400 series Lightstream 1010 Copyright 2003 www. ciscopress. com
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