VTP Server Settings

[itrameshlive]

Hi ,

  How many VTP mode Server we can configure in the cisco switches.

[Jon Marshall]

In theory you could configure all your switches as VTP server if you wanted but obviously not best practice to do so. 

Jon

[Julio E. Moisa]

By default all the switches are configured as servers, defining the roles you can have 2 VTP servers, but if you are going to implement VTP I suggest to use VTP ver 3

VTP primary server and VTP secondary servers. A VTP primary server updates the database information and sends updates that are honored by all devices in the system. A VTP secondary server can only back up the updated VTP configurations received from the primary server to its NVRAM.

By default, all devices come up as secondary servers. You can enter the vtp primary privileged

EXEC command to specify a primary server. Primary server status is only needed for database updates when the administrator issues a takeover message in the domain. You can have a working VTP domain without any primary servers. Primary server status is lost if the device reloads or domain parameters change, even when a password is configured on the switch.

More information: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swvtp.pdf

[itrameshlive]

thanks for your response, but my doubt is in a single cisco switch how many vtp server instances we can create , for example 2 4 or 20...?

[Julio E. Moisa]

Hi

For VTP ver 1 & 2, you can have just 1 instance, for version 3 you can have 2 instances: VLAN and MST.

[Joseph W. Doherty]

In VTP v1 or v2, all devices can be "servers". The only thing special about a v1/v2 server is it allows you to make vlan configuration changes. Normally you would only config one device as the server, and if it fails, you can promote any client to server.

VTP v3 is quite different, among other things, its VTP device roles are much more significant. I haven't used VTP v3, so cannot comment further on how it should be configured.