Introduction to VTP (VLAN Trunking Protocol)

[lagapidis (Lazarus Agapidis)]

Hello Narad

@narad

Q-1=What is the best way to bring a new switch as VTP client into the network where already we have our VTP server running .???

The most important thing to keep in mind is, before connecting the new switch to the network, configure it as transparent. If you do so, then you have no possibility of accidentally reconfiguring all of the VLANs of your network. Once that’s done, you can safely connect the switch. You can then configure the switch with the appropriate VTP configuration based on what you need.

By initially changing the mode to transparent, any revision number that may have existed on the switch is reset to 0, so you are sure that there is no way that you can have a larger revision number on the new switch you are adding.

@narad

Q-2=Lets say we have 4 Switches, out of these 4 , 2 of them are server and both are configured the different domain name ,So we have 2 client , lets say 1 client switch is using the domain 1 and when i bring other switch into the network ,that switch is configured as the client . but which domain name it will accept to join ??..Domain 1 or domain 2 and how will it decide ??.

In such a case, the new switch will receive the domain name of the first VTP server that is able to respond. Both servers will respond, but whichever VTP update reaches the new switch first, that’s the domain name that will be assigned.

@narad

Q-3=Lets i have my vtp server and client in production and lets say i brought a new switch into the network and my goal is to make that switch as vtp client .So what should be rule of thumbs to attach that switch in the network so that there will be no impact my production and also that switch will sync itself with existing server ??

As mentioned before, begin with transparent mode. Connect the switch, and then manually configure the mode, domain, and password. The switch should sync up with the VLAN information from the VTP server without impacting the network.

I hope this has been helpful!

Laz