What must be done to fix this?

Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain, password, and version.

However, VLANs are not passing from the VTP server (existing network) to the VTP clients.

What must be done to fix this?
A . Remove the VTP domain name from all switches with "null" and then replace it with the new domain name.
B . Configure a different native VLAN on all new switches that are configured as VTP clients.
C . Provision one of the new switches to be the VTP server and duplicate information from the existing network.
D . Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred.

View Answer

Answer: D

Explanation:

VTP allows switches to advertise VLAN information between other members of the same VTP domain. VTP allows a consistent view of the switched network across all switches. There are several reasons why the VLAN information can fail to be exchanged. Verify these items if switches that run VTP fail to exchange VLAN information: VTP information only passes through a trunk port. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. Make sure that if EtherChannels are created between two switches, only Layer 2 EtherChannels propagate VLAN information. Make sure that the VLANs are active in all the devices. One of the switches must be the VTP server in a VTP domain. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. ꞏ The VTP domain name must match and it is case sensitive. CISCO and cisco are two different domain names. Make sure that no password is set between the server and client. If any password is set, make sure that the password is the same on both sides. Reference: http://www.cisco.com/en/US/tech/tk389/tk689/ technologies_tech_note09186a0080890613.shtml