Hello David
Resetting the revision number is probably the best way to ensure that adding a switch to your topology will not change the VTP configuration of all the switches.
There are a couple of ways to reset the revision number in VTP:
- change the VTP mode to transparent, and then back to server or client mode
- change the domain name and then change it back
In any case, it’s always best practice to make a switch VTP transparent before connecting it to the network. Once connected, you can then change it back to whatever you need, ensuring that the revision number is indeed smaller than the rest of the switches.
I hope this has been helpful!
Laz