VTP configuration

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Topology:

S1 config: (VTP server)

hostname S1
VTP domain ccna
vtp mode server

S2 config: (VTP client)

hostname S2
VTP domain ccna
vtp mode client

  • to verify , show vtp status

PS: all interfaces should be configured as trunk.

S1:

Switch(config)#int gi1/0/1
Switch(config-if)#switchport trunk encapsulation dot1q 
Switch(config-if)#switchport mode trunk 

S2:

Switch(config)#int gi1/0/1
Switch(config-if)#switchport trunk encapsulation dot1q
Switch(config-if)#switchport mode trunk

Switch(config)#int gi1/0/2
Switch(config-if)#switchport trunk encapsulation dot1q
Switch(config-if)#switchport mode trunk

S3:

Switch(config)#int gi1/0/1
Switch(config-if)#switchport trunk encapsulation dot1q
Switch(config-if)#switchport mode trunk

Lets test it:

we will create a vlan 55 on S1 (server) , and it should be configured via VTP on S2 which is the client:

S1(config)#vlan 55
S1(config-vlan)#name amigo
S1(config-vlan)#exit
S1(config)#exit
S1#
%SYS-5-CONFIG_I: Configured from console by console

S1#show vl
S1#show vlan br
S1#show vlan brief 

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gig1/0/2, Gig1/0/3, Gig1/0/4, Gig1/0/5
                                                Gig1/0/6, Gig1/0/7, Gig1/0/8, Gig1/0/9
                                                Gig1/0/10, Gig1/0/11, Gig1/0/12, Gig1/0/13
                                                Gig1/0/14, Gig1/0/15, Gig1/0/16, Gig1/0/17
                                                Gig1/0/18, Gig1/0/19, Gig1/0/20, Gig1/0/21
                                                Gig1/0/22, Gig1/0/23, Gig1/0/24, Gig1/1/1
                                                Gig1/1/2, Gig1/1/3, Gig1/1/4
55   amigo                            active    
1002 fddi-default                     active    
1003 token-ring-default               active    
1004 fddinet-default                  active    
1005 trnet-default                    active    
S1# 


--------------------------------------------------------------------------

S2#show vlan  brief 

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gig1/0/2, Gig1/0/3, Gig1/0/4, Gig1/0/5
                                                Gig1/0/6, Gig1/0/7, Gig1/0/8, Gig1/0/9
                                                Gig1/0/10, Gig1/0/11, Gig1/0/12, Gig1/0/13
                                                Gig1/0/14, Gig1/0/15, Gig1/0/16, Gig1/0/17
                                                Gig1/0/18, Gig1/0/19, Gig1/0/20, Gig1/0/21
                                                Gig1/0/22, Gig1/0/23, Gig1/0/24, Gig1/1/1
                                                Gig1/1/2, Gig1/1/3, Gig1/1/4
55   amigo                            active    
1002 fddi-default                     active    
1003 token-ring-default               active    
1004 fddinet-default                  active    
1005 trnet-default                    active 

and voila , vlan auto configured on S2.

S3 , will not have auto vlan configured because , its configured as vtp transparent.