Adding A Vtp Client Switch To A Vtp Domain - Cisco Catalyst 3550 series Software Configuration Manual

Configuring VTP
Pruning is supported with VTP version 1 and version 2. If you enable pruning on the VTP server, it is
enabled for the entire VTP domain.
Only VLANs included in the pruning-eligible list can be pruned. By default, VLANs 2 through 1001 are
pruning eligible on trunk ports. Reserved VLANs and extended-range VLANs cannot be pruned. To
change the pruning-eligible VLANs, see the
page

Adding a VTP Client Switch to a VTP Domain

Before adding a VTP client to a VTP domain, always verify that its VTP configuration revision number
is lower than the configuration revision number of the other switches in the VTP domain. Switches in a
VTP domain always use the VLAN configuration of the switch with the highest VTP configuration
revision number. If you add a switch that has a revision number higher than the revision number in the
VTP domain, it can erase all VLAN information from the VTP server and VTP domain.
Beginning in privileged EXEC mode, follow these steps to verify and reset the VTP configuration
revision number on a switch before adding it to a VTP domain:
Command
Step 1
show vtp status
Step 2 configure terminal
Step 3
vtp domain domain-name
Step 4
end
Step 5
show vtp status
Step 6 configure terminal
Step 7
vtp domain domain-name
Step 8
end
Step 9
show vtp status
You can also change the VTP domain name by entering the vlan database privileged EXEC command
to enter VLAN configuration mode and by entering the vtp domain domain-name command. In this
mode, you must enter the exit command to update VLAN information and return to privileged EXEC
mode.
After resetting the configuration revision number, add the switch to the VTP domain.
Catalyst 3550 Multilayer Switch Software Configuration Guide
13-14
12-22.
Purpose
Check the VTP configuration revision number.
If the number is 0, add the switch to the VTP domain.
If the number is greater than 0, follow these steps:
a. Write down the domain name.
Write down the configuration revision number.
b.
Continue with the next steps to reset the configuration revision number on the
c.
switch.
Enter global configuration mode.
Change the domain name from the original one displayed in Step 1 to a new name.
The VLAN information on the switch is updated and the configuration revision
number is reset to 0. You return to privileged EXEC mode.
Verify that the configuration revision number has been reset to 0.
Enter global configuration mode.
Enter the original domain name on the switch.
The VLAN information on the switch is updated, and you return to privileged EXEC
mode.
(Optional) Verify that the domain name is the same as in Step 1 and that the
configuration revision number is 0.
"Changing the Pruning-Eligible List" section on
Chapter 13 Configuring VTP
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