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CCNA 3 v3.0 Module 5 Switches

CCNA 3 v3.0 Module 5 Switches. Objectives. LAN design LAN switches. LAN Design Goals. Functionality Scalability Adaptability Manageability. LAN Design Considerations. To maximize available LAN bandwidth and performance, the design considerations are:

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CCNA 3 v3.0 Module 5 Switches

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  1. CCNA 3 v3.0 Module 5 Switches

  2. Objectives • LAN design • LAN switches

  3. LAN Design Goals • Functionality • Scalability • Adaptability • Manageability

  4. LAN Design Considerations To maximize available LAN bandwidth and performance, the design considerations are: • The function and placement of servers • Collision-detection issues • Segmentation issues • Broadcast domain issues

  5. 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

  6. Layer 1 Design

  7. Typical MDF in Star Topology

  8. Extended Star Topology in a Multi-Building Campus

  9. Layer 1 Documentation Logical Diagram

  10. Cut Sheet

  11. Layer 2 Design: Developing a LAN Topology • Switch frames based on MAC address information • Provide error detection • Reduce congestion in network

  12. Microsegmentation of the Network Microsegmentation of the network reduces the size of collision domains and reduces collisions.

  13. Asymmetric Switching Asymmetric switching provides switched connections between ports of unlike bandwidth, such as a combination of 10-Mbps and 100-Mbps ports

  14. Layer 2 Switch Collision Domains

  15. Layer 3 Design

  16. 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.

  17. Physical Network Maps

  18. Setting Up VLAN Implementation

  19. VLAN Communication

  20. Access Layer The access layer provides users in workgroups access to the network. It is the entry point for user workstations and servers to the network.

  21. Access Layer Functions of the Access Layer: • Shared Bandwidth, if hub is used. • Switched Bandwidth, if switch is used. • MAC Layer filtering. • Microsegmentation: creates small collision domain.

  22. Access Layer Switches • Catalyst 1900 series • Catalyst 2820 series • Catalyst 2950 series • Catalyst 4000 series • Catalyst 5000 series

  23. Distribution Layer The distribution layer of the network is between the access and core layers. It helps to define and separate the core. The purpose of this layer is to provide a boundary definition in which packet manipulation can take place.

  24. 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 • Security

  25. Cisco Catalyst 2926G Cisco Catalyst 6000 Family Distribution Layer Switches <not pictured> Cisco Catalyst 5000 Family

  26. Core Layer The core layer is a high-speed switching backbone. The core layer should be designed to switch packets as fast as possible.

  27. IGX 8400 series Catalyst 8500 series Lightstream 1010 Core Layer Switches <not pictured> Catalyst 6500 series

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