==== BASIC DEVICE COMMANDS ====

===Show Running Configuration File===

<code>
#show running-config
</code>

===Show Startup Configuration File (NVRAM)===

<code>
#show startup-config
</code>

===Copy Changes from Running Config to the Startup Config===

<code>
#copy running-config startup-config
</code>

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

<code>
#show version
</code>

==== BASIC SETINGS ====

===Set a Warning Banner for Login Prompt===

<code>>enable
#configure terminal
#banner motd &
#banner line1
#banner line2 &
#exit
</code>

===Change BAUD rate===
<code>
switch#configure terminal
switch(config)#line con 0
switch(config-line)#speed 9600
switch(config-line)#end
switch#wr
</code>

===Set hostname===

<code>>enable
#configure terminal
#hostname router1
#exit
</code>

==== DEVICE SECURITY ====

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

<code>
#configure terminal
#enable password level 15 EnablePass1
</code>

===Set Level and Secret Password Access (recommended method)===

<code>>enable
#configure terminal
#enable secret level 15 EnableSecret1
#exit
</code>

==== SAVING RESTORING AND DELETING CONFIGURATIONS ====

=== Save Running Config to Startup Config ===

<code>
​#copy running-configuration startup-configuration
</code>

=== ​Save Running Config to a Remote TFTP Server ===

<code>
​#copy running-configuration tftp
<enter IP>
​<enter filename>
</code>
​
=== Save Config From Remote TFTP Server to the Running Config ===

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

===Delete Current configuration===

<code>
#write erase
<confirm>
#reload
</code>
==== INFORMATIONAL COMAMNDS ====

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

<code>>show spantree
</code>

==== MAC ADDRESSES ====

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

<code>>show mac-address-table
</code>

===Permanently Assign a Device MAC Address to a Port===

<code>
#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
</code>

===Clear Mac Address Table===

<code>
#clear mac-address-table
</code>

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

== 1900 ==

<code>
#conf term
(config)#int e0/5
(config-if)#port secure
(config-if)#port secure max-mac-count 1
</code>

== 2950 ==

<code>
#conf term
(config)#interface fa0/3
(config-if)#switchport port-security
(config-if)#switchport mode access
(config-if)#switchport port-security maxumim 1
</code>

==== VLANS ====

Show VLAN

<code>>show vlan
</code>

===Show Port VLAN Membership Information===

<code>>show vlan-membership
</code>

===Show VLAN Interface Information===

<code>>show interface vlan 1
</code>

===Create VLANs===

<code>
#conf term
(config)#vlan 30 name desktops
(config)#vlan 25 name servers
(config)#vlan 20 name printers
</code>

OR

<code>
#vlan database
(vlan)#vlan 10 name testing
(vlan)#vlan 12
</code>

===Removing VLANs===

<code>
#conf term
(config)#no vlan 30
(config)#no vlan 25 name servers
(config)#no vlan 20 printers
</code>

OR

<code>
#vlan database
(vlan)#no vlan 10
(vlan)#no vlan 12
</code>

===Delete the VLAN information from Flash or NVRAM, and reload the switch===
<code>
# delete flash:vlan.dat
<confirm>

# reload
<confirm>
</code>

===Assigning a VLAN to a Single Port 1900===

<code>
#conf term
(config)#interface fa0/0
(config-if)#vlan-membership static 30
</code>

==2950==

<code>
#conf term
(config)#interface fa0/0
(config-if)#switchport mode access
(config-if)#switchport access vlan 40
</code>

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

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

===Assign a VLAN to a Range of Ports 1900===

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

===Assign an IP to a VLAN 1900===

<code>
#conf term
(config)#interface vlan 1
(config-if)#ip address 10.0.1.1 255.255.255.0
</code>

==== VTP (Virtual Trunking Protocol) ====

===Show VTP Status===

<code>>show vtp status
</code>

===Show Trunk Information (1900)===

<code>>show trunk a>show trunk b
</code>

===Set the VTP Domain===

<code>
#conf term
(config)#vtp domain mydomain
#vlan database
(config)#vtp domain mydomain
</code>

===Set Switch as a VTP Server===

<code>
#vlan database
(vlan)#vtp server
(vlan)#vtp domain mydomain
(vlan)#vtp password mypass1
</code>

===Set Switch as a VTP Client===

<code>
#vlan database
(vlan)#vtp client
(vlan)#vtp domain mydomain
(vlan)#vtp password mypass1
</code>

===Trunk Link Create a Trunk Link that will Carry the VLAN Configurations===

<code>
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
</code>

===Dynamic Trunk Link Create a Dynamic Trunk Link that will Carry the VLAN Configurations===

<code>
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
</code>