Two switch in server mode

[acbenny]

Hi all,

If two switch is configured as server mode with same vtp domain (ABC) but different Configuration Revision and going to be connected together.

Is it the largest configuration revision switch (Switch-2) will be the Active role so that it will copy all Vlan information to Switch-1

or

they will copy all Vlan each other

Switch-1# sh vtp status

VTP Version : 2

Configuration Revision : 200

Maximum VLANs supported locally : 254

Number of existing VLANs : 11

VTP Operating Mode : Server

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

Switch-2# sh vtp status

VTP Version : 2

Configuration Revision : 250

Maximum VLANs supported locally : 254

Number of existing VLANs : 100

VTP Operating Mode : Server

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

[glen.grant]

Yes the server that has the highest revision will overwrite the other servers vlan database .

[Jon Marshall]

Jack

The switch with the highest configuration revision number will overwrite the vlan database of the lower switch.

Jon

[iyde]

... and that's exactly the reason why you have to be CAREFUL when working with VTP in server/client mode, as you will be able to shut your whole entwork down accidentially in the case where you put on a switch to the entwork with a higher revision number than your current VTP server and the new switch has only a few VLAN present.

HTH

[Leo Laohoo]

For a VTP Server to over-write another, you have to have a higher revision number but also the same Domain Name and the the same Password. If the password is incorrect, the database will not be copied across.

[iyde]

Good point regarding the VTP password.

This one can be seen with the "show vtp password" command - it is not seen in the "show vtp status" output.

HTH.