Exploration LAN Switching Chapter2A

7/28/2019 Exploration LAN Switching Chapter2A

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2006 Cisco Systems, Inc. All rights reserved. Cisco Publ icITE I Chapter 6 1

Configure a Switch

LAN Switching and Wireless Chapter 2


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2006 Cisco Systems, Inc. All rights reserved. Cisco Publ icITE 1 Chapter 6 2

Objectives

Summarize the operation of Ethernet as defined for100/1000 Mbps LANs in the IEEE 802.3 standard.

Explain the functions that enable a switch to forwardEthernet frames in a LAN.

Configure a switch for operation in a networkdesigned to support voice, video, and datatransmissions.

Configure basic security on a switch that will operatein a network designed to support voice, video, anddata transmissions.


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Ethernet as defined in the IEEE 802.3 standard

Key elements of Ethernet/802.3 networks


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Key elements of Ethernet/802.3 networksEthernet frame

MAC address




The MAC table

MAC Addressing and Switch MAC Tables



Collision domains:

802.3 -> collisions -> loss of bandwidth

Hubs vs. switches

Collision and Broadcast domains



Key elements of Ethernet/802.3 networks Uncontrolled Collision and broadcast domains





Key elements of Ethernet/802.3 networks- Uncontrolled Collision and broadcast domains



Key elements of Ethernet/802.3 networks Controlled Collision and broadcast domains




Ethernet as defined for 100/1000 Mbps LANs inthe IEEE 802.3 standard

Design considerations for Ethernet/802.3 networks



Ethernet and the IEEE 802.3 standard

Design considerations for Ethernet/802.3 networksControlling Network Latency

Removing Network Bottlenecks




Exercises


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Switch forwarding methods: Store-and-forward (used on current Cisco Catalyst switches)

Cut-through:

Fast-forward

Fragment-free

Functions that Enable a Switch to ForwardEthernet Frames in a LAN


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Switch forwarding methods



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Symmetric and asymmetric Switching


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How memory buffering works Switch may store frames before forwarding

May also store frames due to congestion at destination


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Comparing Layer 2 with Layer 3 switching


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Configuring a Switch for Operation

Cisco IOS commands used to navigate the CLI


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Cisco IOS commands used to navigate the CLI


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The boot sequence of a Cisco switch


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How to prepare the switch to be configured


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Performing a basic switch configuration


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Managing the MAC address table To show the MAC address table:

show mac-address-table

To create a static mapping in the MAC address table:

mac-address-table static vlan interface


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To verify the Cisco IOS configuration using the Showcommand


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To verify the Cisco IOS configuration using the Showcommand


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To manage the Cisco IOS configuration files


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To manage the Cisco IOS configuration files To backup to a TFTP server:

To clear contents of startup configuration:

erase nvram: or erase startup-config


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Configuring Basic Security on a Switch

Cisco IOS commands


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Configuring Basic Security on a Switch

Cisco IOS commands

Exploration LAN Switching Chapter2A

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