1© 2004, Cisco Systems, Inc. All rights reserved.

CCNA 1 v3.1 Module 8 Ethernet Switching

Claes Larsen, CCAI

222© 2004, Cisco Systems, Inc. All rights reserved.

Objectives

333© 2004, Cisco Systems, Inc. All rights reserved.

Layer 2 Bridging

444© 2004, Cisco Systems, Inc. All rights reserved.

Bridges

555© 2004, Cisco Systems, Inc. All rights reserved.

Switch Operation

666© 2004, Cisco Systems, Inc. All rights reserved.

Full Duplex

777© 2004, Cisco Systems, Inc. All rights reserved.

Network Latency

888© 2004, Cisco Systems, Inc. All rights reserved.

Switch Modes

• Store and Forward - A switch receives the entire frame before sending it out the destination port.

• Cut-Through - A switch starts to transfer the frame as soon as the destination MAC address is received.

999© 2004, Cisco Systems, Inc. All rights reserved.

Spanning-Tree Operation

101010© 2004, Cisco Systems, Inc. All rights reserved.

STP States

111111© 2004, Cisco Systems, Inc. All rights reserved.

Types of Networks

121212© 2004, Cisco Systems, Inc. All rights reserved.

Collisions in Collision Domain

131313© 2004, Cisco Systems, Inc. All rights reserved.

Collision Domain Segmentation

141414© 2004, Cisco Systems, Inc. All rights reserved.

Increasing a Collision Domain

151515© 2004, Cisco Systems, Inc. All rights reserved.

Four Repeater Rule

161616© 2004, Cisco Systems, Inc. All rights reserved.

Round-Trip Delay Calculation

171717© 2004, Cisco Systems, Inc. All rights reserved.

Layer 1 Devices Extend Collision Domains

181818© 2004, Cisco Systems, Inc. All rights reserved.

Limiting the Collision Domains

191919© 2004, Cisco Systems, Inc. All rights reserved.

Segmenting a Collision Domain with a Bridge

202020© 2004, Cisco Systems, Inc. All rights reserved.

Broadcasts in a Bridged Environment

212121© 2004, Cisco Systems, Inc. All rights reserved.

Effects of Broadcast Radiation on Hosts in a IP Network

222222© 2004, Cisco Systems, Inc. All rights reserved.

Average Number of Broadcasts and Multicasts for IP

232323© 2004, Cisco Systems, Inc. All rights reserved.

Broadcast Domain Segmentation

242424© 2004, Cisco Systems, Inc. All rights reserved.

Data Flow Through a Network

252525© 2004, Cisco Systems, Inc. All rights reserved.

Segments

262626© 2004, Cisco Systems, Inc. All rights reserved.

Summary