VTP domain mis-match

Answered Question
Aug 2nd, 2007

Hi,

Can anubody help to troubleshoot VTP domain Mis-match. I am getting the follwoing message in my switch.

switch(enable) sh trunk 2/2

* - indicates vtp domain mismatch

Port Mode Encapsulation Status Native vlan

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

2/2 on dot1q trunking* 1

Regards,

Yagnesh Dave

I have this problem too.
0 votes
Correct Answer by Jon Marshall about 9 years 4 months ago

Hi

As you can see from your second switch there is no domain name set.

But your first switch has a domain name of mpls. If you want these two switches to exchaneg VTP information you will need to make the domain name match.

But it's not as simple as that. Both your switches are in VTP transparent mode so i'm guessing you don't want a VTP server/cleint setup in your network ?

Jon

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Jon Marshall Thu, 08/02/2007 - 01:45

Hi

Can you post output of "sh vtp status"/ "sh vtp domain" from both switches.

Jon

yagnesh.dave Thu, 08/02/2007 - 01:54

Hi Jhon,

Here is the output of sh vtp domain:

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

switch(enable) sh vtp domain

Domain Name Domain Index VTP Version Local Mode Password

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

mpls 1 2 Transparent -

Vlan-count Max-vlan-storage Config Revision Notifications

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

725 1023 0 disabled

Last Updater V2 Mode Pruning PruneEligible on Vlans

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

192.168.1.252 disabled disabled 2-71,73-98,100-105,107-129,131-140,142-151,153-1000

yagnesh.dave Thu, 08/02/2007 - 01:57

Hi Jon,

Forgot to past the output from the other switch

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

Switch2#sh vtp status

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 1005

Number of existing VLANs : 122

VTP Operating Mode : Transparent

VTP Domain Name : ''

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0x66 0x51 0x7A 0x50 0x24 0x25 0xDF 0x33

Configuration last modified by 172.16.69.2 at 0-0-00 00:00:00

Correct Answer
Jon Marshall Thu, 08/02/2007 - 02:57

Hi

As you can see from your second switch there is no domain name set.

But your first switch has a domain name of mpls. If you want these two switches to exchaneg VTP information you will need to make the domain name match.

But it's not as simple as that. Both your switches are in VTP transparent mode so i'm guessing you don't want a VTP server/cleint setup in your network ?

Jon

mohammedmahmoud Thu, 08/02/2007 - 03:20

hi,

Just a small addition to Jon's post, if the switches are server/client, then the switch having null domain name will learn the VTP domain name from the other switch.

HTH,

Mohammed Mahmoud.

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