VTP Configuration with Packet Tracer : www.ipcisco.com

VTP Configuration with Packet Tracer

Category: Cisco, Switching, VTP
Author: gokhankosem, on 19 Jun 12 - 8 Comments

VTP Configuration with Packet Tracer



To configure VTP we will use two swithes and two PCs for each swithes given below:

Packet Tracer VTP Topology

VTP Example Topology


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.

After that we configure ServerA as a VTP Server and the Server 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 confiugreVTP 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 use “show vtp status” and the screenshot will be like below:

cisco show vtp status command

Show vtp status on SwitchB


We will configure the same parameters for the switchA except VTP mode.

SwitchA# enable 
SwitchA(config)# vtp mode client
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 ciscoo
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

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

To verify use “show vtp status” and the screenshot will be like below:

cisco show vtp status command

Show vtp status on SwitchA


To test our configuration lets create three additional VLANs on SwitchA and then check switchB if the same VLANs created under it too.To do this:

SwitchA(config)#  vlan 10
SwitchA(config)# vlan 20
SwitchA(config)# vlan 30
SwitchA(config)# end

When we use “show vlan brief” command on SwitchA we will see the created VLANs like below:

cisco show vlan brief command

Show vlan brief on SwitchA


Again, when we check VLANs with the same command we will see the same VLANs on SwitchB:

cisco show vlan brief command

Show vlan brief on SwitchB


After this configuration, whenever we create, delete or modify a VLAN on SwitchA, the same change will be done in SwitchB too. Think about how a usefull function is it during configuration a large network with many switches!!! I hope this article will be helpfull for you…

Download the Packet Tracer example with .pkt format here.

You can download “Packet Tracer” in Tools section.



About the Author
Gokhan Kosem is a telecommunation and network engineer. His ambition to IP networks and end-to-end system installation made him to prepare this web-site. By sharing his experiences about various networking protocols beside different system installation experiences and Cisco, Juniper, Alcatel-Lucent devices configurations, he is aimed to be helpful for his collegues in all over the world. He is currently lives in Istanbul, Turkey.

8 comments for “VTP Configuration with Packet Tracer”

1
chandu

thaksssssssssss

July 9th, 2012 at 18:00
2

Good Explanation : …

September 29th, 2012 at 17:25
3
4
Thiyagu

i tried to make mismatch error..even after mismatch its actually works..what should went wrong during mismatch.i tried in packet tracer..

December 11th, 2012 at 20:45
5
ANUP CA

GOOD EXAMPLE

July 23rd, 2013 at 08:26
6
Swaroop Shirote

GOOD

August 18th, 2013 at 10:57
7
8
Md. Zulker Nain

Mr.Gokhan Kosem ,I am very impressed to see someone whose aim is to help others and I want to give a very large thanks,because in our profession it is very difficult to find a person who is helpful.

March 31st, 2014 at 17:23

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