VTP Client updates VTP server after reload ?

[Stefan Marcin]

Hi guys, I am trying to learn vtp, so I am using GNS3 for the simulation with two switches. I have built simple connection between two switches, configured trunk and vtp server / client modes. I was curious about this question.

What happens when I have both vtp client and server synchronized and I erase memory on vtp server and reload vtp server. From my understanding while learning for the certification I learned that client does not send any updates, does it ?

But I found out that after vtp server has rebooted and I set the domain name, suddenly all information from vtp client has been setup in vtp server. 

So from my understanding, vtp server can request information from vtp client and client can send that ? Or are there also any other conditions. 

Thanks.

[nileshdubey]

This happened because of VTP configuration revision number. When you erased the configuration from servers and rebooted it, its configuration revision number reset to 0 and after coming back, It received the information from client with higher configuration revision number and synchronized the same.  Thanks

[Rejohn Cuares]

I would suggest posting this kind of question to Cisco Learning Networks.

https://learningnetwork.cisco.com/welcome

I'd probably provide these links as they are informative references. Happy reading.

http://blog.ine.com/2010/04/25/how-well-do-you-know-vtp/

https://learningnetwork.cisco.com/search.jspa?q=vtp

https://www.youtube.com/results?search_query=vtp

https://www.cisco.com/c/en/us/support/docs/lan-switching/vtp/10558-21.html

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/vtp.html