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Switch Configuration - Computer Network - Lecture Slides, Slides of Computer Networks

Chhattisgarh Swami Vivekanand Technical UniversityComputer Networks

Switch Configuration, Switch MODE LED Indicator, Switch Port LED Indicator Modes, Poweron Self Test, Connecting to the Switch, Common CLI Commands, Managing MAC Tables and many other topics of Computer Network can be find in my documents.

Typology: Slides

2011/2012

Uploaded on 11/09/2012

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Switch Configuration
Semester 3 – Module 6
Students completing this module should be able to:
•Identify the major components of a Catalyst switch
•Monitor switch activity and status using LED indicators
•Examine the switch bootup output using HyperTerminal
•List the major switch command modes
•Verify the default settings of a Catalyst switch
•Set an IP address and default gateway for the switch to allow connection and management over a network
•View the switch settings with a Web browser
•Set interfaces for speed and duplex operation
•Examine and manage the switch MAC address table
•Configure port security
•Manage configuration files and IOS images
•Perform password recovery on a switch
•Upgrade the IOS of a switch
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Switch Configuration

Semester 3 – Module 6

Students completing this module should be able to:

  • Identify the major components of a Catalyst switch
  • Monitor switch activity and status using LED indicators
  • Examine the switch bootup output using HyperTerminal
  • List the major switch command modes
  • Verify the default settings of a Catalyst switch
  • Set an IP address and default gateway for the switch to allow connection and management over a network
  • View the switch settings with a Web browser
  • Set interfaces for speed and duplex operation
  • Examine and manage the switch MAC address table
  • Configure port security
  • Manage configuration files and IOS images
  • Perform password recovery on a switch
  • Upgrade the IOS of a switch Docsity.com

Overview

• Because of their dominant role in modern

networks, the ability to understand and

configure switches is essential for network

support

• A new switch will have a preset

configuration with factory defaults

• Switches can be configured and managed

from a command-line interface (CLI)

Switch MODE LED Indicator

• A switch has 4 types of MODE LED:

  • System
    • Green – operating correctly
    • Amber – POST failed or fatal error
  • RPS
  • Port Mode
  • Port Status

Switch Port LED Indicator Modes

• A switch has 4 types of LED Modes:

  • STAT (default mode)
    • Indicates working status of port
  • UTL
    • Indicates overall usage of bandwidth
  • FDUP
    • Indicates if the port is half or full duplex
  • 100
    • Indicates what speed the port is set: 10/

Power-on Self Test (P.O.S.T.)

  • Once the power cable is connected, the switch initiates a series of tests called the power-on self test (POST). POST runs automatically to verify that the switch functions correctly
  • The Port Status LEDs change during switch POST.
  • The Port Status LEDs turn amber for about 30 seconds as the switch discovers the network topology and searches for loops. - Green, the switch has established a link between the port and a target, such as a computer. - LED off, the switch has determined that nothing is plugged into the port.

Connecting to the Switch

• HyperTerminal via rollover cable through

console port

  • HyperTerminal Settings
    • 9600 bps
    • Hardware flow control
    • No parity

Common CLI Commands

• Exiting Priv EXEC

  • Ctrl-z | end | exit

• Entering Global Config from Priv EXEC

  • config t

• Using Help

  • Any command followed by a?

Default Switch Configuration

  • When powered up for the first time, a switch has

default data in the running configuration file.

  • The default configuration includes:
    • hostname is Switch
    • No passwords are set on the console or virtual terminal (vty) lines
    • The switch ports or interfaces are set to auto negotiate 10Mbps or 100Mbps
    • All switch ports are in VLAN 1 (Management VLAN)
    • All hosts should be able to s/r ARP messages from each other

Configuring the Switch

• When a network administrator needs to

ensure an interface has particular speed

and duplex values, the values can be set

manually for each interface

  • Switch(config)# int fa 0/
  • Switch(config-if)# duplex full or half
  • Switch(config-if)# speed 10, 100, or 1000

Managing MAC Tables

  • A switch dynamically learns and maintains thousands of MAC addresses.
  • To preserve memory and for optimal operation of the switch, learned entries may be discarded from the MAC address table.
  • Machines may have been removed from a port, turned off, or moved to another port on the same switch or a different switch.
  • This could cause confusion in frame forwarding.
  • For all these reasons, if no frames are seen with a previously learned address, the MAC address entry is automatically discarded or aged out after 300 seconds
  • Show mac-address-table
  • Clear mac-address-table

Configuring Port Security

Managing Moves and Changes

• When a new switch is added to a network,

configure the following:

  • Switch name
  • IP address for the switch in the management

VLAN

  • A default gateway
  • Line passwords