Table of Contents

BASIC DEVICE COMMANDS

Show Running Configuration File

#show running-config

Show Startup Configuration File (NVRAM)

#show startup-config

Copy Changes from Running Config to the Startup Config

#copy running-config startup-config

Show Version (Platform Type / OS Revision / Last Boot / Memory / Interfaces / Conf Register)

#show version

BASIC SETINGS

Set a Warning Banner for Login Prompt

>enable
#configure terminal
#banner motd &
#banner line1
#banner line2 &
#exit

Change BAUD rate

switch#configure terminal
switch(config)#line con 0
switch(config-line)#speed 9600
switch(config-line)#end
switch#wr

Set hostname

>enable
#configure terminal
#hostname router1
#exit

DEVICE SECURITY

Set Password and Level for Exec & Non-Exec Access (>enable

#configure terminal
#enable password level 15 EnablePass1
>enable
#configure terminal
#enable secret level 15 EnableSecret1
#exit

SAVING RESTORING AND DELETING CONFIGURATIONS

Save Running Config to Startup Config

​#copy running-configuration startup-configuration

​Save Running Config to a Remote TFTP Server

​#copy running-configuration tftp
<enter IP>
​<enter filename>

​

Save Config From Remote TFTP Server to the Running Config

​#copy tftp running-configuration
​<enter IP>
​<enter filename>
​Delete NVRAM
​#delete nvram

Delete Current configuration

#write erase
<confirm>
#reload

INFORMATIONAL COMAMNDS

Show Spanning Tree Information (port cost/hello interval/root bridge address)

>show spantree

MAC ADDRESSES

Show Mac Address Table (Shows which Devices are Connected to which Port)

>show mac-address-table

Permanently Assign a Device MAC Address to a Port

#conf term
(config)#mac-address-table permanent 1111-1111-1111 e0/5
(config)#mac-address-table static 3333.3333.3333.3333 vlan 1 int fa0/3

Clear Mac Address Table

#clear mac-address-table

Configure Port Security to “Sticky Learn” the MAC Address Connected and only Allow that Device to Connect

1900
#conf term
(config)#int e0/5
(config-if)#port secure
(config-if)#port secure max-mac-count 1
2950
#conf term
(config)#interface fa0/3
(config-if)#switchport port-security
(config-if)#switchport mode access
(config-if)#switchport port-security maxumim 1

VLANS

Show VLAN 

>show vlan

Show Port VLAN Membership Information

>show vlan-membership

Show VLAN Interface Information

>show interface vlan 1

Create VLANs

#conf term
(config)#vlan 30 name desktops
(config)#vlan 25 name servers
(config)#vlan 20 name printers

OR 

#vlan database
(vlan)#vlan 10 name testing
(vlan)#vlan 12

Removing VLANs

#conf term
(config)#no vlan 30
(config)#no vlan 25 name servers
(config)#no vlan 20 printers

OR 

#vlan database
(vlan)#no vlan 10
(vlan)#no vlan 12

Delete the VLAN information from Flash or NVRAM, and reload the switch

# delete flash:vlan.dat
<confirm>

# reload
<confirm>

Assigning a VLAN to a Single Port 1900

#conf term
(config)#interface fa0/0
(config-if)#vlan-membership static 30
2950
#conf term
(config)#interface fa0/0
(config-if)#switchport mode access
(config-if)#switchport access vlan 40

Removing a Single Port VLAN Assignment (Defaults Back to VLAN 1) 1900

#conf term
(config)#interface fa0/0
(config-if)#no vlan-membership static 30

Assign a VLAN to a Range of Ports 1900

#conf term
(config)#interface range fast 0/2 – 5
(config-if)#switchport access vlan 30

Assign an IP to a VLAN 1900

#conf term
(config)#interface vlan 1
(config-if)#ip address 10.0.1.1 255.255.255.0

VTP (Virtual Trunking Protocol)

Show VTP Status

>show vtp status

Show Trunk Information (1900)

>show trunk a>show trunk b

Set the VTP Domain

#conf term
(config)#vtp domain mydomain
#vlan database
(config)#vtp domain mydomain

Set Switch as a VTP Server

#vlan database
(vlan)#vtp server
(vlan)#vtp domain mydomain
(vlan)#vtp password mypass1

Set Switch as a VTP Client

#vlan database
(vlan)#vtp client
(vlan)#vtp domain mydomain
(vlan)#vtp password mypass1
SW1#conf term
SW1(config)#interface fast 0/24
SW1(config-if)#switchport mode trunk

SW2#conf term
SW2(config)#interface fast 0/24
SW2(config-if)#switchport mode trunk
SW1#conf term
SW1(config)#interface fast 0/24
SW1(config-if)#switchport mode dynamic desirable
SW2#conf term
SW2(config)#interface fast 0/24
SW2(config-if)#switchport mode dynamic desirable