Library - Cisco Commands

Find interface description

• enable
• show interface description
  
  

  Interface                      Status         Protocol Description
  Vl1                            admin down     down     
  Vl4020                         up             up       
  Fa0/1                          up             up       job3-eth1
  Fa0/2                          up             up       job4-eth1
  Fa0/3                          up             up       log2-eth1
  Fa0/4                          up             up       sql2-eth1
  Fa0/5                          up             up       policy2-eth1
  	

• enable
• show interface Fa0/26 status
  
  

  #show interfaces Fa0/26 status 
  Port      Name               Status       Vlan       Duplex  Speed Type
  Fa0/26    eth1               connected    trunk      a-full  a-100 10/100BaseTX
  	

• show interface Fa0/26 switchport
  
  

  Name: Fa0/26
  Switchport: Enabled
  Administrative Mode: trunk
  Operational Mode: trunk
  Administrative Trunking Encapsulation: dot1q
  Operational Trunking Encapsulation: dot1q
  Negotiation of Trunking: On
  Access Mode VLAN: 1 (default)
  Trunking Native Mode VLAN: 1 (default)
  Administrative Native VLAN tagging: enabled
  Voice VLAN: none
  Administrative private-vlan host-association: none 
  Administrative private-vlan mapping: none 
  Administrative private-vlan trunk native VLAN: none
  Administrative private-vlan trunk Native VLAN tagging: enabled
  Administrative private-vlan trunk encapsulation: dot1q
  Administrative private-vlan trunk normal VLANs: none
  Administrative private-vlan trunk associations: none
  Administrative private-vlan trunk mappings: none
  Operational private-vlan: none
  Trunking VLANs Enabled: 2,4020-4023
  Pruning VLANs Enabled: 2-1001
  Capture Mode Disabled
  Capture VLANs Allowed: ALL
  	
   

Create VLAN

• en
• conf t
• vlan vlan id
• name vlan-id name
• end

Assign Interface to a VLAN

• en
• conf t
• interface Fa0/1
• switchport mode access (port will be connecto to single host)
• switchport access vlan vlan-id
• description description name
• no shut (make the interface active)

Assign IP address to a switch

• enable
• conf t
• interface vlan vlan-id
• ip address ip-address subnet-mask
• end

Assign default gateway to a switch

• enable
• conf t
• ip defatult-gateway ip-address
• end

Assign DNS server IP to a switch

• enable
• conf t
• interface vlan vlan-id
• ip address ip-adress subnet-mask
• end

Disable DNS resolution

• enable
• conf t
• no ip domain-lookup

Configure telnet password

• enable
• conf t
• line vty 0 (choose any number)
• password password
• login
• end