VLAN Trunk Protocol (VTP)

VLAN Trunk Protocol (VTP)

VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products.

To configure VTP on Switch Syntax:

Syntax:

Switch(config)#vtp domain <name> 

Switch(config)#vtp mode <serer / client / transparent 

Switch(config)#vtp password <password> 

Switch(config)#vtp pruning                          (only on the server switch)

ON SWITCH1

Step1:
VLAN Creation on Switch1

Step2:
VTP Configration

Switch1#config terminal
Switch1(config)#vtp domain network4em
Switch1(config)#vtp mode server
Switch1(config)#vtp password cisco

ON SWITCH2

Step1:
VLAN Creation on Switch2

Step2:
VTP Configration

Switch2#config terminal
Switch2(config)#vtp domain network4em
Switch2(config)#vtp mode client
Switch2(config)#vtp password cisco

Verify and troubleshooting:

Switch#show vlan

Switch#show vtp status

Note:- verify vlan before and after configuration.

Output:

Switch1#sh vtp status 

VTP Version                               : 2

Configuration Revision                 : 4

Maximum VLANs supported locally : 255

Number of existing VLANs            : 7

VTP Operating Mode                    : Server

VTP Domain Name                       : network4em

VTP Pruning Mode                        : Enabled

VTP V2 Mode                               : Enabled

VTP Traps Generation                   : Disabled

MD5 digest                                 : 0x74 0xFE 0x00 0xC9 0xF0 0x60 0x3E 0xBA 

Configuration last modified by 0.0.0.0 at 3-1-93 00:06:34

Local updater ID is 0.0.0.0 (no valid interface found)