What events change VTP revision number?

workfrom925

Each time add or delete a vlan, the revision number increases by 1. When rename the VTP domain name, the revision number is reset to 0. Other than these two events, anything else changes VTP revision numbers?

I seem to read somewhere that naming a VLAN also increases VTP revision number. I tried it on my 2950. It does not increase the revision number.

MrXpert

If you change VTP version number or VTP pruning mode on a server this will increment revision#
Off the top of my head, I cannot remember whether naming a VLAN increments revision number and I am not in a position to test this out right now.

Vask3n

For what it's worth, I just tried renaming a VLAN on a 2960 and it DOES change the revision number.

The test I did was this:

Enable VTP
Create a VLAN, name it
Check Revision #
Rename the same VLAN
Check Revison #

Vask3n

Pasting my config and output:

Switch(config)#
Switch(config)#
Switch(config)#
Switch(config)#vtp version 2
Switch(config)#vlan 2
Switch(config-vlan)#name two
[/B][/I]Switch(config-vlan)#do sh vtp status
VTP Version : 2
Configuration Revision : 3
Maximum VLANs supported locally : 255
Number of existing VLANs : 6
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Enabled
VTP Traps Generation : Disabled
MD5 digest : 0x45 0xB9 0xA1 0xEC 0xD3 0x41 0x58 0xD7
Configuration last modified by 0.0.0.0 at 3-1-93 00:00:27
Local updater ID is 0.0.0.0 (no valid interface found)
Switch(config-vlan)#name three
Switch(config-vlan)#do sh vtp status
VTP Version : 2
Configuration Revision : 4
Maximum VLANs supported locally : 255
Number of existing VLANs : 6
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Enabled
VTP Traps Generation : Disabled
MD5 digest : 0xB5 0x28 0xD0 0xFB 0x09 0x31 0x74 0xFC
Configuration last modified by 0.0.0.0 at 3-1-93 00:00:36
Local updater ID is 0.0.0.0 (no valid interface found)
Switch(config-vlan)#

JoeBirds

Changing the VTP mode to Transparent will reset the revision number on that switch to 0. Good to know when adding a switch to a production network.