VTP Configuration Example

Packet Tracer VTP Configuration

 

In this article, we will focus on how to configure VTP, with Packet Tracer. For VTP Configuration, we will use the topology below with two switches and two PCs.

 

VTP Example Topology

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For all Packet Tracer Examples and Files, you can check Packet Tracer Labs Page.

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First of all we must configure the trunk between swithes. Because VTP information pass through only on trunk links on management VLAN (VLAN 1). To do this:

SwitchA> enable

SwitchA# configure terminal

SwitchA(config)# interface fa 0/24

SwitchA(config-if)#switchport trunk encapsulation dot1q

SwitchA(config-if)# switchport mode trunk

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to up

SwitchA(config-if)# end

 

Now the trunk is activated. For switchport mode trunk command it is not necessary to use the same command at the other side of the link, without this job it is automatically activated.

 

VTP Client And VTP Server Configuration

 

After that we configure Switch A as a VTP Server and the Switch B as a VTP Client. The default switch VTP mode is VTP Server, so we did not change anything on SwitchA. But in SwitchB we will change vtp mode. Then in both switches we will configure VTP domain, VTP password, vtp version and vtp prunning. The related configuration for both switches are below:

 

SwitchB> enable

SwitchB# configure terminal

SwitchB(config)# vtp mode client

Setting device to VTP CLIENT mode.

SwitchB(config)# vtp domain cisco

Changing VTP domain name from NULL to cisco

SwitchB(config)# vtp password abc123

SwitchB(config)# vtp version 2

SwitchB(config)# vtp prunning enable

SwitchB(config)# end

To verify VTP configuration, use “show vtp status” and the output of this command will be like below:

 

Show vtp status on SwitchBWe will configure the same parameters for the Switch A except VTP Mode. Switch A will be in VTP Server Mode by default. But to show you, we will use “vtp server mode” command..

 

 

 

SwitchA# enable

SwitchA(config)# vtp mode server

Device mode already VTP SERVER.

SwitchA(config)# vtp domain ciscoo

Changing VTP domain name from NULL to ciscoo

04:50:49 %DTP-5-DOMAINMISMATCH: Unable to perform trunk negotiation

on port Fa0/24 because of VTP domain mismatch.

SwitchA(config)# vtp domain cisco

Changing VTP domain name from ciscoo to cisco

SwitchA(config)# vtp password abc123

SwitchA(config)# vtp version 2

SwitchA(config)# vtp prunning enable

SwitchA(config)# end

Here, during VTP domain configuration, an error occurred because of the domain missmatch and after that when we corrected the configuration then this error dissappeared.