Ch2 Basic Switching and Config Practical

Question 1

show bootvar

Answer 1

Command that displays the current IOS version boot file is set to.

Question 2

Recovering from Switch Crash (5)

Answer 2

1. Connect to switch by console port and terminal program.
2. Unplug switch power cord
3. Reconnect switch power and, within 15 seconds, press and hold down the Mode button while the system LED is still flashing green.
4. Continue holding Mode button until System LED turns amber and then solid green; release Mode button.
5. Boot loader switch: prompt appears in terminal emulation software on pc

Question 3

Creating VLAN and Associate to Interface (5)

Answer 3

1. vlan vlan_id - assigns vlan port number
2. name vlan_name - assigns vlan name
3. exit
4. interface interface_id - access interface
5. switchport access vlan vlan_id - assigns interface as vlan port

Question 4

Configure Management Interface for Switch (4)

Answer 4

1. configure terminal - enters global configuration mode
2. interface vlan vlan number - enters interface configuration for supplied SVI vlan port.
3. ip address ip address subnet mask - assigns ip / subnet to SVI
4. no shutdown - activates svi port.

Question 5

Configure Default Gateway (2)

Answer 5

1. configure terminal - enters global configuration
2. ip default-gateway ip address of default gateway - assigns default gateway for switch

Question 6

Configure Duplex, Speed, and MDIX (5)

Answer 6

1. configure terminal- enters global configuration mode
2. interface FastEthernet 0/1 - enters config for FE0/1
3. duplex full / half / auto - assigns duplex to either half, full , or auto.
4. speed 100 / 100 / 1000 / auto - assigns speed to 10,100, 1000 mbs, or auto.
5. mdix auto - sets mdix option to auto to allow switch to detect which wires to transmit and receive from; determines what type of “cable” is used (like devices=crossover; different=straight; router->pc: crossover.

Question 7

Configuring SSH (10)

Answer 7

1. show ip ssh - if switch does not support SSH this command will not be recognized - displays SSH version being used and other SSH information; similar to show running-config cmd except for SSH
2. ip domain-name domain name - configures the IP domain name of the network ; global config cmd
3. crypto key generate rsa - Cisco recommends 1024 modulus; use ip ssh version 2 cmd to enable version 2 ssh. version 1 has known issues
4. username username secret password - assigns username and password for SSH
5. line vty 0 15 - selects vty lines ; in this example lines 0 through 15
6. transport input ssh - enables SSH on the selected VTY lines/
7. login local - requires login with authentication done locally instead of a server.
8. exit - returns to global config
9. ip ssh version 2 - enables SSH version 2 to be used.
10. exit - exits global config.

Question 8

Global config cmd used to delete RSA key and disable SSH server.

Answer 8

crypto key zeroize rsa