two vtp server in a same domain?

[dannan lin]

if two switches are set to be server in a same vtp domain. which one  will be the master or them just exchange vlan info and update  themselves.

thanks

[Leo Laohoo]

The one with the higher revision number will be the master's master.

Be careful of this setup.  I've seen VLAN database disappear with this setup.

[milan.kulik]

Hi,

IMHO, VLAN database cleared accidentally is a general danger of VTP, no matter  of the server number.

On the contrary, it had been dangerous in the past to run a single server  in your VTP domain as the VLAN database had been saved on servers only.

This is not valid anymore, but still it's recommended to have multiple VTP servers in the domain as they are only places  to configure the VLAN database.

So if you  decide to run VTP, it's worth having two servers at least.

HTH,

Milan

[Joseph W. Doherty]

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

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Posting

Assuming both are properly sync'ed to begin with, updating either will update the whole VTP domain.  Recall (?) if both are updated at almost the same time, you can lose one of the server's updates.

[smogra]

VTP server is the default mode. The one with higher cofig-revision number will overwrite the information or in other words, will be the master. But, be very careful while adding servers and clients to your VTP domain. Make very  sure they have a lower rev level or it can cause major issues with your  network. Some people think that a client can't over write a server but  that is incorrect, if your add a VTP client to your domain and it has a  higher rev level it will over write the server.

Sweta

Please rate useful posts.

[ANTONIO DEUS]

The best way, is setup the switch in client mode and then change the switch to server mode.

When the switch is in client mode, the switch will be update the version and other parameters (through the switch(es) in server mode), and then change the switch to server mode.

With this procedure there’s nothing to be worry (100% guaranty).

ADAJio

[Joseph W. Doherty]

Disclaimer

The     Author of this posting offers the information contained within this     posting without consideration and with the reader's understanding  that    there's no implied or expressed suitability or fitness for any   purpose.   Information provided is for informational purposes only and   should not   be construed as rendering professional advice of any kind.   Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In    no event shall Author be liable for any damages  whatsoever  (including,   without limitation, damages for loss of use,  data or  profit) arising  out  of the use or inability to use the  posting's  information even if  Author  has been advised of the  possibility of such  damage.

Posting

Actually adding a VTP client can "zap" your VLANs  (if its rev number is higher).  The correct way is to set the switch to  transparent mode, which resets the revision, add the switch to the  network, and then setting it to client or server mode as needed.

[LKcomputers]

I don't thing so.    

Switch(config)#vtp mode client

Setting device to VTP CLIENT mode.

Switch(config)#vlan 44

VTP VLAN configuration not allowed when device is in CLIENT mode.

Switch(config)#