Cisco Catalyst 3560-X Series, Software Configuration Manual

Page: 497 / 1538

1-9
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring VTP
Configuring VTP
Default VTP Configuration
Table 1-2 shows the default VTP configuration.
VTP Configuration Guidelines
You use the vtp global configuration command to set the VTP password, the version, the VTP file name,
the interface providing updated VTP information, the domain name, and the mode, and to disable or
enable pruning. For more information about available keywords, see the command descriptions in the
command reference
for this release. The VTP information is saved in the VTP VLAN database. When
VTP mode is transparent, the VTP domain name and mode are also saved in the switch running
configuration file, and you can save it in the switch startup configuration file by entering the
copy
running-config startup-config privileged EXEC command. You must use this command if you want to
save VTP mode as transparent, even if the switch resets.
When you save VTP information in the switch startup configuration file and reboot the switch, the switch
configuration is selected as follows:
•
If the VTP mode is transparent in the startup configuration and the VLAN database and the VTP
domain name from the VLAN database matches that in the startup configuration file, the VLAN
database is ignored (cleared), and the VTP and VLAN configurations in the startup configuration
file are used. The VLAN database revision number remains unchanged in the VLAN database.
• If the VTP mode or domain name in the startup configuration do not match the VLAN database, the
domain name and VTP mode and configuration for VLAN IDs 1 to 1005 use the VLAN database
information.
Domain Names
When configuring VTP for the first time, you must always assign a domain name. You must configure
all switches in the VTP domain with the same domain name. Switches in VTP transparent mode do not
exchange VTP messages with other switches, and you do not need to configure a VTP domain name
for them.
Table 1-2 Default VTP Configuration
Feature Default Setting
VTP domain name Null.
VTP mode (VTP version 1 and
version 2) Server.
VTP mode (VTP version 3) The mode is the same as the mode in VTP version 1 or 2 before
conversion to version 3.
VTP version Version 1 (Version 2 is disabled).
MST database mode Transparent.
VTP version 3 server type Secondary.
VTP password None.
VTP pruning Disabled.