1

CCNA 3 v3.1 Module 5 Switches

Claes Larsen, CCAI

222

Objectives

333

LAN Design Goals

444

LAN Design Considerations

• The function and placement of servers

• Collision-detection issues

• Segmentation issues

• Broadcast domain issues

555

Server Placement

666

Collision Domain: Basic Shared Access

777

Ethernet Technology: Segmentation

888

Broadcast Domain

999

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

101010

Gather Requirements and Expectations

111111

Analyze Requirements and Data

121212

Develop LAN Topology

131313

Developing a LAN Topology

141414

Documentation Logical Diagram

151515

Extended Star Topology in a Multi-Building Campus

161616

Cut Sheet

171717

Setting Up VLAN Implementation

181818

Use Routers to Impose Logical Structure

191919

Addressing Maps

202020

Developing a Layer 1 LAN Topology

212121

Cable Characteristics and IEEE 802.3 Values

222222

Star Topology Using CAT 5 UTP

232323

Typical MDF in Star Topology

242424

Multi-Building Campus

252525

Extended Star Topology in a Multi-Building Campus

262626

Extended Star Topology

272727

Documentation Logical Diagram

282828

Cut Sheet

292929

Developing a Layer 2 LAN Topology

303030

Microsegmentation of the Network

313131

Asymmetric Switching

323232

Collision Domain Size with Hubs

333333

Layer 2 Switch Collision Domains

343434

Layer 2 Switch with Hubs

353535

Layer 2 Migrate to Higher Bandwidth

363636

Layer 3 Router Implementation

373737

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.

383838

Layer 3 Router for Segmentation

393939

Logical Addressing Mapped to Physical Network

404040

Addressing Maps

414141

Logical Network Maps and Addressing Maps

424242

Physical Network Maps

434343

Setting Up VLAN Implementation

444444

VLAN Communication

454545

Hierarchical Design Model: Access Layer

464646

Access Layer

474747

Functions of the Access Layer

484848

Features of Access Layer Switches

494949

Access Layer Switches

• Catalyst 1900 series

• Catalyst 2820 series

• Catalyst 2950 series

• Catalyst 4000 series

• Catalyst 5000 series

505050

Distribution Layer

515151

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

525252

Distribution Layer Switches

Cisco Catalyst 2926G

Cisco Catalyst 6000 Family<not pictured>

Cisco Catalyst 5000 Family

535353

Core Layer

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

545454

Core Layer Switches

<not pictured>

Catalyst 6500 series

IGX 8400 series

Catalyst 8500 series

Lightstream 1010

555555

Summary