On page 96/156 of INE Vol I labs. Flying through them so far. I am moving through them fast because I’ve worked hands on with a lot of the topics so far. If I don’t understand something, though- I take the time to stop and understand it before moving on. Here’s an interesting tidbit on VTP I learned.
-If you have a network (for simplicity, we’ll say two switches, directly connected by one link) running VTP, with a client-server model (versus transparent mode), the mode of the server will be sent in VTP messages, and the receiving client will change their respective mode (IF the version is 1 OR 2; 3 does not do this)
Of course, I have to prove this:
Here’s our root SW, standard config pretty much.
SW1#show vtp status VTP Version capable : 1 to 3 VTP version running : 1 VTP Domain Name : CISCO VTP Operating Mode : Server Maximum VLANs supported locally : 1005 Number of existing VLANs : 13 Configuration Revision : 26
Then we have our SW2 (Transparent mode). This is just to show the current version:
SW2#sh vtp status VTP Version capable : 1 to 3 VTP version running : 2 VTP Domain Name : CISCO VTP Operating Mode : Transparent Maximum VLANs supported locally : 1005 Number of existing VLANs : 13 Configuration Revision : 0
Now, I’ll change SW2 to a client with a “vtp mode client” – and here is the output from SW2 proving that it is now following suit with the VTP server, and using the version it is using (VTP ver 1 now):
SW2#sh vtp status VTP Version capable : 1 to 3 VTP version running : 1 VTP Domain Name : CISCO VTP Operating Mode : Client Maximum VLANs supported locally : 1005 Number of existing VLANs : 13 Configuration Revision : 26
There we go! Pretty nifty.