This document discusses switch configuration, including: - Switches contain a CPU, RAM, and operating system and perform a power-on self-test when powered on. - The system LED indicates power and status, port LEDs show port status and mode. - Switches can be configured through the console port or remotely via IP address assignment and HTTP. - Basic configurations include hostname, passwords, management VLAN IP address, and port settings. Backups can be saved to a TFTP server.

1. CCNA3: Switching Basics and Intermediate Routing v3.0
CISCO NETWORKING ACADEMY PROGRAM
Chapter 6 – Switch Configuration
Switch Configuration
Starting the switch
Configuring the Switch

2. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Switch Overview
Color System Status
Off System is not powered on.
Green System is operating normally.
Amber System is receiving power but
is not functioning properly.
Switches contain CPU, RAM,
Operating System
POST
When switched on – System LED
indicates status

3. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Status LED Overview
• Mode button toggles
between different port
modes
• Port mode displayed on
Port Mode LEDs
• Individual Port status
above each port

4. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Port Status 1

5. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Port Status 2

6. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
User Mode Commands

7. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Switch Management
• Connect to switch via console connection
• Give switch IP address on management VLAN 1
Switch(config)#interface vlan 1
Switch(config-if)#ip address 192.168.1.2 255.255.255.0
• Use web-browser based management
Switch(config)#ip http server

8. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Switch Configuration 1
• Erase any existing settings
– VLAN database
– Configuration in NVRAM
• Reload the switch

9. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Switch Configuration 2 - Security
• Static MAC address • Port Security

10. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Switches
• Contain:
–CPU
–RAM
–Operating System

11. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
LED
Indicators
Default
setting

12. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
POST Test & Initial boot Up, and
Help
• Console into a switch with the same cable used to
console into a router
• Use same settings in Hyperterminal
• Context sensitive help is available from the command line –
using the question mark as you would in router help.

13. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Catalyst IOS Intro
• User EXEC mode and Privileged EXEC mode.
– enable command.
• IOS based switch is just like the router IOS.
– configure command – go to global config mode.
– copy run start – to save config to NVRAM.
• Host Name configuration -1-255 characters
– hostname [name]
• Comment to help identify the interface.
– description [description-string] - interface config. mode
– Use quotes when using spaces in string.
• IOS-based: same as on a router.
– access help by entering ?

14. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Default Configuration
• When powered up w/out configuration, the
default name is Switch.
• No passwords have been configured.
• All switch ports are part of VLAN 1
• Switch has no IP address
• Show version shows the IOS version and
the configuration register.

15. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Actual Configuration• First,
– Remove any VLAN info (delete flash: vlan.dat)
– Erase startup
– Reload
• Follow router configuration method to configure
hostname, line passwords, set a default gateway, etc.
• Set IP address for management VLAN1 for telnet
access.
• Fast Ethernet ports default to auto-speed and auto-
duplex, or they can be set manually.
• Management of a switch can also be done using a GUI
interface as long as HTTP service is turned on.

16. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Remote Access to Switch
• To telnet, ping, or globally manage the switch:
– Enter an IP address and management VLAN.
• Configuration
– interface vlan 1
– ip address [address][mask]
– ip default-gateway [address]
– Verify with show ip interface

17. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Defining port speed / duplex
• Speed:
– Interface config mode:
– speed [10 | 100 | auto]
• Line mode is either full duplex or half duplex.
– Interface config mode:
– duplex [auto | full | half]
– auto option only for fixed Fast Ethernet TX
ports.

18. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Backup on TFTP Server
• IOS-based commands:
– copy run tftp – to save config file to
tftp server.
– copy tftp run – to download config
from tftp server to active config and to
NVRAM.

19. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
VLAN Configuration
• Entering VLAN Database
– Switch#vlan database
– Switch(vlan)#
• Adding VLANs
– Switch(vlan)#vlan 15 name Accounting
• Deleting VLAN database
– Switch#delete flash:vlan.dat
• Assigning ports to a VLAN
– Switch(config)#interface FastEthernet 0/12
– Switch(config-if)#switchport access vlan 15
• Verify VLAN Configuration
– Switch#show vlan

20. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
MAC Address Table
• Switches learn the MAC addresses of workstations that are
connected to their switch ports by examining the source address
of frames that are received on that port – then they are placed in
a MAC table.
• If no frames are seen with a previously learned address, the MAC
address entry is automatically discarded or aged out after 300
seconds.

21. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Static MAC addresses• If entered by an admin, it will be permanent
and not age out or be cleared out by powering
down the switch.
• The node has to be attached to the switch.

22. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Port Security
• Anyone can plug in if they are in the open
• Port security can be set on an interface – so that,
for instance, the number of MAC addresses that
can be learned on any one interface could be 1.
• Port security can be verified with:
Show port security
Note commands
available

23. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Adding a Switch

24. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
MAC Addresses

25. CCNA3: Switching Basics and Intermediate Routing v3.1
CISCO NETWORKING ACADEMY PROGRAM
Module 6 – Switch Configuration Brierley
Password Recovery
On a Cisco Catalyst 2900, hold down the
MODE button during switch startup to
begin the process.
Instructions attached for Password
Recovery on a Cisco 1900 Catalyst
Switch.

26. CCNA3: Switching Basics and Intermediate Routing v3.0
CISCO NETWORKING ACADEMY PROGRAM
Chapter 6 – Switch Configuration
Module 6
Switch Configuration
END