Which of the following statements are NOT part of the guidelines for configuring VLAN Trunking Protocol (VTP)
to ensure that VLAN information is distributed to all Cisco switches in the network? (Choose all that apply.)
A.
The VTP version must be the same on all switches in a VTP domain.
B.
The configuration revision number must be configured identically on all switches in a VTP domain.
C.
The VTP password must be the same on all switches in a VTP domain.
D.
The VTP domain name must be the same on all switches in a VTP domain.
E.
VLANs configured on clients should exist on the server switch.
F.
The switch(s) that will share VLAN information is(are) operating in VTP server mode
G.
The switches must be configured to use the same method of VLAN tagging
H.
The switches must be connected with trunk links
Explanation:
For all switches in a VTP domain, the VTP version, VTP password, and VTP domain name must be the same.
Moreover, switches that will share VLAN information must be operating in VTP server mode, must be using the
same VLAN tagging method (either 802.1q or ISL), and must be connected with trunk links.
Many of these settings can be verified by using the show vtp status command. By viewing the output of the
command on two switches that are not sharing information, inconsistencies that prevent the sharing of VLAN
information can be identified. Consider the output from the two switches below:
Based on the output for the four switches, you should NOT expect Switch62 to exchange VLAN information
with the other switches because the VTP domain names do not match. Line 6 shows that Swicth62 is set to
Corp and the others are set to Corporate. The command to set the VTP domain name is:
Switch62(config)#vtp domain corporateSwitch62 is operating in Client mode, which means it will accept VLAN changes sent by switches operating in
Server mode once the domain name mismatch is corrected. It will both process them and forward them, but will
not allow VLAN changes to be made locally, and it will not save any of the VLAN information in NVRAM (line 5).
The command to place a switch into Client mode is:
Switch62(config)#vtp mode client
Switch60 is operating in Server mode and will allow changes to be made locally, will send those changes to
other switches, and WILL save all changes (both learned and made locally) in NVRAM, as shown by line 5. The
command to place a switch into Server mode is:
Switch62(config)#vtp mode server
Switch61 is operating in Transparent mode. It will allow changes to be made locally and WILL save all changes
made locally in NVRAM, but will NOT send those changes to other switches, as shown in line 5. It will accept
and pass along VTP changes from switches operating in Server mode, but will not save those changes in
NVRAM. The command to place a switch in Transparent mode is:
Switch62(config)#vtp mode transparent
Switch63 will ignore any information it receives from the other switches, even though the domain name
matches, because it has a higher configuration revision number (63) than the other switches. These revision
numbers are used by the switches to prevent unnecessary processing of changes that have already been
received.
VTP is used to synchronize Virtual Local Area Network (VLAN) databases across switches. VTP server
switches can be used to add, delete, or rename VLANs, which are then synchronized over the network with
VTP client switches. This allows a network administrator to create a VLAN once, as opposed to having to
create it individually on every switch on the network. The password is used to validate the source of the VTP
advertisements sent between the switches in the VTP domain.
The option stating that the configuration revision number must be configured identically on all switches in a VTP
domain is incorrect. The configuration number cannot be directly configured, but is instead synchronized during
VTP updates.
The option stating that VLANs configured on clients should exist on the server switch is incorrect. VTP clients
do not allow local VLAN configuration, and can only receive VLANs via VTP synchronization over the network.
Objective:
LAN Switching Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot VLANs (normal/extended range) spanning multiple switches
