Hello Mario
That’s a good question. I went into the lab and checked this out. I have found that on transparent switches, the revision number always remains zero. Even though I added several VLANs to this switch, you can see that this is so:
SW1#show vtp statu
*Nov 9 06:38:55.759: %SYS-5-CONFIG_I: Configured from console by consoles
VTP Version capable : 1 to 3
VTP version running : 2
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 5254.0006.8000
Configuration last modified by 0.0.0.0 at 11-9-22 06:37:31
Feature VLAN:
--------------
VTP Operating Mode : Transparent
Maximum VLANs supported locally : 1005
Number of existing VLANs : 14
Configuration Revision : 0
MD5 digest : 0xD8 0x87 0x4A 0xF5 0x0D 0x70 0x90 0x91
0x65 0x54 0x4B 0x9F 0x2A 0xC2 0x95 0xCC
SW1#
This means that even local changes made do not change the revision number of the transparent switch, nor do any VTP messages that a transparent switch may receive and relay to other switches. This makes sense, because a revision number has no meaning for a transparent switch from the moment that its VLAN configuration remains completely independent of any other switch on the network.
I hope this has been helpful!
Laz