Cisco Router & Switch Basics

Question 1

Command: Configure IP address on SVI - 192.168.0.10/24 & Configure default gateway of 192.168.0.1

Answer 1

Interface vlan 1
ip address 192.168.0.10 255.255.255.0
no shutdown
exit
ip default-gateway 192.168.0.1

Question 2

Command: Set duplex to full and speed to 100 Mbps on interface FastEthernet0/1

Answer 2

Interface f0/1
Duplex full
speed 100
End

show interface f0/1

Question 3

Command: Enable & Disable CDP Globally

Answer 3

Enable:
cdp run

Disable:
no cdp run

Question 4

Command: Disable CDP at the interface level

Answer 4

No cdp enable

Question 5

Command: Verify CDP info & CDP neighbor info

Answer 5

show cdp
show cdp neighbors
show cdp neighbors detail

Question 6

CDP vs. LLDP: LLDP Differences

Answer 6

Depending on switch version, may be disabled by default
Only supported on physical interfaces (CDP can be on virtual too)
Can only discover up to one device per port
Can discover Linux servers

Question 7

Command: Enable/Disable LLDP Globally

Answer 7

Enable:
lldp run

Disable:
no lldp run

Question 8

Command: Disable LLDP at the Interface level

Answer 8

no lldp transmit

no lldp receive

Question 9

Command: Verify LLDP & LLDP Neighbors

Answer 9

show lldp
show lldp neighbors
show lldp neighbors detail

Question 10

Command: View info on all interfaces

Answer 10

show ip interface brief

Question 11

Interface Output: Administratively down

Answer 11

Interface is turned off. Enabled using “no shutdown”

Question 12

Interface Output: Down/Down

Answer 12

Layer 1 issue

Check interface is cabled at both ends & device on the other side is powered on

Question 13

Interface Output: Up/Down

Answer 13

Layer 2 issue

Check interface configuration matches on both sides

Question 14

Command: Verify speed/duplex settings on FastEthernet0/1

Answer 14

show interface f0/1