By default all the switches are in VTP server mode till the time you manually change the VTP mode.
Now if it is in client mode and not updating the vlan you have to make sure that there is a proper trunk config between the server switch and the client switch and the VTP domain name and password should match on VTP server and client.
This means there is a password mismatch so just configure the same passoword on your VTP client switch and everything will work fine.For VTP to work fine you need to match the domain name and password on Server and client switch.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...