Networking Week 12: Switch Configurations

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Questions and Answers

What does a blinking amber LED light indicate on a switch?

The device is functioning normally

PoE is denied due to power limitations (correct)

The switch is starting up

Power is being supplied correctly

What should be done first when accessing a Cisco Catalyst 2960 switch?

Install the device's firmware

Run the system configuration dialog

Connect the rollover cable to the console port (correct)

Configure the IP address

What is the baud rate setting commonly used for Cisco switches?

4800

9600 (correct)

115200

19200

What happens if no configuration is found on the switch during startup?

The system configuration dialog is initiated Signup and view all the answers

To establish a terminal session for CLI access on the switch, which of these programs can be used?

HyperTerminal Signup and view all the answers

What is the expected outcome of the switch bootup process after power is applied?

Flash is validated before loading the IOS Signup and view all the answers

Which command line configuration step is essential before making any changes to the switch?

Connect to the console via Terminal Signup and view all the answers

In the context of a switch booting up, what does 'IOS' stand for?

Internetwork Operating System Signup and view all the answers

What is the purpose of the VTY lines on a switch?

To provide remote access to the switch Signup and view all the answers

What command is used to configure a password for the console line?

line console 0 Signup and view all the answers

Why should Privileged EXEC mode be password protected?

To prevent unauthorized access and configuration changes Signup and view all the answers

Which command is used to set the enable secret password?

enable secret Top$ecretPrivEXECpassWORD Signup and view all the answers

What is the main disadvantage of using Telnet for remote access?

Data is transmitted in plaintext Signup and view all the answers

Which of the following commands exits the VTY configuration mode?

exit Signup and view all the answers

How many VTY lines are configured on the switch?

16 Signup and view all the answers

What does SSH provide for managing network devices?

Remote access with encryption Signup and view all the answers

What command is used to generate RSA keys for enabling SSH?

crypto key generate rsa Signup and view all the answers

What is the valid range for the key modulus size when generating RSA keys?

360 to 2048 Signup and view all the answers

Which command is used to set the SSH version to be used?

ip ssh version 2 Signup and view all the answers

What command should be used to check local users' database for user authentication?

login local Signup and view all the answers

To create a VLAN and assign a name, which command sequence should be used?

vlan 2 name Registrar Signup and view all the answers

What is the first step in setting up specific VTY lines for SSH access?

QCUSwitch(config)#line vty 0 5 Signup and view all the answers

What command is used to add ports to a VLAN after creation?

configure access ports for vlan Signup and view all the answers

Which of the following commands enables SSH and shows a confirmation message?

*Mar 4 7:4:9.374: %SSH-5-ENABLED: SSH 1.99 has been enabled Signup and view all the answers

Study Notes

Week 12: Initial Switch Configuration

Learning Outcomes: Familiarize with Cisco 2960 series switches, perform initial switch configuration, understand commands used in switch configuration.

Cisco Catalyst 2960 Series Switches

Intelligent Ethernet switches, new family of fixed-configuration standalone devices.
Provide 10/100 Fast Ethernet and 10/100/1000 Gigabit Ethernet connectivity.
Enable enhanced LAN services for entry-level enterprise, mid-market, and branch office networks.

Switch Configurations (Specific Part Numbers)

WS-C2960-24TT-L: 24 Ethernet 10/100 ports, 2 10/100/1000 TX uplinks, rack unit (RU), multilayer switch, Entry-level.
WS-C2960-48TT-L: 48 Ethernet 10/100 ports, 2 10/100/1000 TX uplinks, rack unit (RU), multilayer switch, Entry-level.
WS-C2960-24TC-L: 24 Ethernet 10/100 ports, 4 dual-purpose uplinks (1 10/100/1000 Ethernet port + 1 SFP Gigabit Ethernet port per uplink), rack unit (RU), multilayer switch, Entry-level.
WS-C2960-48TC-L: 48 Ethernet 10/100 ports, 4 dual-purpose uplinks (1 10/100/1000 Ethernet port + 1 SFP Gigabit Ethernet port per uplink), rack unit (RU), multilayer switch, Entry-level.
WS-C2960G-24TC-L: 24 Ethernet 10/100/1000 ports, 4 dual-purpose uplinks (1 10/100/1000 Ethernet port + 1 SFP Gigabit Ethernet port per uplink), rack unit (RU), multilayer switch, Entry-level.

Switch LEDs

System LED: Indicates switch connection to power source. Green light confirms power and proper functioning.
Redundant Power System (RPS) LED: Shows RPS status. Green light = RPS running. Flashing green = providing power to another device. Amber light = standby mode. Blinking amber = RPS failure.
Port Status LED: Shows port status mode (default green = active). Green LED indicates data transmission/reception. Amber = link fault/port blocked, completely off = no link. Alternating green/amber = link fault.
Port Duplex LED: Indicates port duplex mode. Green light = full-duplex.
Port Speed LED: Indicates port operating speed. No LED = 10 Mb/s. Green=100 Mb/s. Blinking green = 1000 Mb/s
Power over Ethernet (PoE) Mode: Green LED = PoE is activated. Alternating green/amber = PoE is being denied. Blinking amber = PoE is unavailable.

System Configuration Dialog

If no configuration is found, the IOS runs the setup script (System Configuration Dialog).
The script asks questions to help configure the switch.

Boot Loader

Connect rollover cable to switch's console port and computer's COM port.
Use a terminal emulation program (e.g., HyperTerminal, Tera Term, PuTTY) to view CLI output.
The switch's boot process involves validating the flash and loading the IOS.

IP Address and Default Gateway

Use the command-line interface
Enter commands: switch#configure terminal, switch(config)#interface Vlan1, switch(config-if)#ip address 192.168.0.254 255.255.255.0, no shutdown, exit, ip default-gateway 192.168.0.1, end

Basic Switch Configuration (CLI)

Step 1: Connect to the console. Many Cisco switches use serial settings: Baud Rate: 9600, Data bits: 8, Stop bits: 1, Parity: None.
Step 2: Set management IP and default gateway. Enter the desired IP address and subnet mask values.
Step 3: Set hostname and domain name. Use hostname command in global configuration mode to set a logical hostname. Use ip domain-name command in global configuration mode to set a domain name.
Step 4: Set logins for VTY lines and console port. Configure strong passwords for all virtual terminal lines (VTY lines 0-15) and for the console port (line console 0).
Step 5: Set Privileged EXEC password. Password protect the privileged EXEC mode (enable secret).
Step 6: Enable SSH.switch(config)#ip ssh version 2
Step 7: Configure Trunk ports
Step 8: Add access ports to VLAN
Step 9: Configure trunk ports (if needed)
Step 10: Save configuration. Use copy running-config startup-config command to save config to startup config file.

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Description

This quiz focuses on the initial configurations of Cisco Catalyst 2960 series switches. Brush up on the commands and procedures necessary for configuring these intelligent Ethernet switches to enhance your networking skills. Prepare to tackle specific part numbers and their configurations in this assessment.