© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE I Chapter 6 1 LAN Switching and Wireless Basic Switch Concepts and Configuration Chapter 2 Modified by Pete Brierley

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 2 Objectives  Summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE standard.  Explain the functions that enable a switch to forward Ethernet frames in a LAN.  Configure a switch for operation in a network designed to support voice, video, and data transmissions.  Configure basic security on a switch that will operate in a network designed to support voice, video, and data transmissions.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 3 Summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE standard Key elements of Ethernet/802.3 networks

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 4 Summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE standard Design considerations for Ethernet/802.3 networks

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 5 Summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE standard LAN design considerations to reduce network latency

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 Explain the Functions that Enable a Switch to Forward Ethernet Frames in a LAN

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 7 Explain the Functions that Enable a Switch to Forward Ethernet Frames in a LAN

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 8 Explain the Functions that Enable a Switch to Forward Ethernet Frames in a LAN

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 9 Explain the Functions that Enable a Switch to Forward Ethernet Frames in a LAN

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 10 Configure a Switch for Operation in a Network

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 11 Configure a Switch for Operation in a Network Cisco IOS help facilities

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 12 Configure a Switch for Operation in a Network Cisco IOS commands to access the command history

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 13 Configure a Switch for Operation in a Network

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 14 Configure a Switch for Operation in a Network Prepare the switch to be configured

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 15 Configure a Switch for Operation in a Network The basic switch configuration console Ethernet

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 16 Configure a Switch for Operation in a Network

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 17 Configure a Switch for Operation in a Network

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 18 Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 19 Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 20 Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 21 Key switch security attacks:, MAC address flooding, spoofing attacks, CDP attacks, and Telnet attacks Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 22 How tools are used to improve network security Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 23 Why secure ports on a switch Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 24 Cisco IOS commands used to disable unused ports Configure Basic Security on a Switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 25 Questions Describe the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE standard. What functions enable a switch to forward Ethernet frames in a LAN? How do you configure a switch for operation in a network designed to support voice, video, and data transmissions? How do you configure basic security on a switch that will operate in a network designed to support voice, video, and data transmissions?

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 26 Summary  LAN Design Process that explains how a LAN is to be implemented Factors to consider in LAN design include Collision domains Broadcast domains Network latency LAN segmentation

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 27 Summary  Switch forwarding methods Store & forward – used by Cisco Catalyst switches Cut through – 2 types Fast forwarding Cut through

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 28 Summary  Symmetric switching Switching is conducted between ports that have the same bandwidth  Asymmetric switching Switching is conducted between ports that have unlike bandwidth

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 29 Summary  CISCO IOS CLI includes the following features Built in help Command history/options  Switch security Password protection Use of SSH for remote access Port security

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 30 END LAN Switching and Wireless – Chapter 2