CCNA 3 v3.1 Module 5 Switches

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Objectives

LAN Design Goals

LAN Design Considerations The function and placement of servers Collision-detection issues Segmentation issues Broadcast domain issues

Server Placement

Collision Domain: Basic Shared Access

Ethernet Technology: Segmentation

Broadcast Domain

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

Gather Requirements and Expectations

Analyze Requirements and Data

Develop LAN Topology

Developing a LAN Topology

Documentation Logical Diagram

Extended Star Topology in a Multi-Building Campus

Cut Sheet

Setting Up VLAN Implementation

Use Routers to Impose Logical Structure

Addressing Maps

Developing a Layer 1 LAN Topology

Cable Characteristics and IEEE 802.3 Values

Star Topology Using CAT 5 UTP

Typical MDF in Star Topology

Multi-Building Campus

Extended Star Topology in a Multi-Building Campus

Extended Star Topology

Documentation Logical Diagram

Cut Sheet

Developing a Layer 2 LAN Topology

Microsegmentation of the Network

Asymmetric Switching

Collision Domain Size with Hubs

Layer 2 Switch Collision Domains

Layer 2 Switch with Hubs

Layer 2 Migrate to Higher Bandwidth

Layer 3 Router Implementation

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.

Layer 3 Router for Segmentation

Logical Addressing Mapped to Physical Network

Addressing Maps

Logical Network Maps and Addressing Maps

Physical Network Maps

Setting Up VLAN Implementation

VLAN Communication

Hierarchical Design Model: Access Layer

Access Layer

Functions of the Access Layer

Features of Access Layer Switches

Access Layer Switches Catalyst 1900 series Catalyst 2820 series

Distribution Layer

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

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

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

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

Summary