9-8
Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 9 Creating and Maintaining VLANs
Using the VLAN Trunking Protocol
To configure VTP pruning on an interface, use the switchport trunk pruning vlan interface
configuration command (see the
“Changing the Pruning-Eligible List” section on page 9-28
). VTP
pruning operates when an interface is trunking. You can set VLAN pruning-eligibility, whether or not
VTP pruning is enabled for the VTP domain, whether or not any given VLAN exists, and whether or not
the interface is currently trunking.
Configuring VTP
This section includes procedures for configuring VTP. These sections are included:
•
Default VTP Configuration, page 9-8
•
VTP Configuration Guidelines, page 9-8
•
Configuring a VTP Server, page 9-10
•
Configuring a VTP Client, page 9-11
•
Disabling VTP (VTP Transparent Mode), page 9-11
•
Enabling VTP Version 2, page 9-12
•
Enabling VTP Pruning, page 9-13
•
Monitoring VTP, page 9-13
Default VTP Configuration
Table 9-3
shows the default VTP configuration.
VTP Configuration Guidelines
These sections describe guidelines you should follow when implementing VTP in your network.
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.
Note
If NVRAM and DRAM storage is sufficient, all switches in a VTP domain should be in VTP server
mode.
Table 9-3
Default VTP Configuration
Feature
Default Setting
VTP domain name
Null.
VTP mode
Server.
VTP version 2 enable state
Version 2 is disabled.
VTP password
None.
VTP pruning
Disabled.
