Understanding The Vtp Domain; Understanding Vtp Modes - Cisco 7604 Configuration Manual

Understanding How VTP Works
For complete information on configuring VLANs, see
Note
These sections describe how VTP works:
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Understanding the VTP Domain

A VTP domain (also called a VLAN management domain) is made up of one or more interconnected
network devices that share the same VTP domain name. A network device can be configured to be in one
and only one VTP domain. You make global VLAN configuration changes for the domain using either
the command-line interface (CLI) or Simple Network Management Protocol (SNMP).
By default, the Cisco 7600 series router is in VTP server mode and is in the no-management domain state
until the router receives an advertisement for a domain over a trunk link or you configure a management
domain.
If the router receives a VTP advertisement over a trunk link, it inherits the management domain name
and the VTP configuration revision number. The router ignores advertisements with a different
management domain name or an earlier configuration revision number.
If you configure the router as VTP transparent, you can create and modify VLANs but the changes affect
only the individual router.
When you make a change to the VLAN configuration on a VTP server, the change is propagated to all
network devices in the VTP domain. VTP advertisements are transmitted out all trunk connections.
VTP maps VLANs dynamically across multiple LAN types with unique names and internal index
associations. Mapping eliminates excessive device administration required from network administrators.

Understanding VTP Modes

You can configure a Cisco 7600 series router to operate in any one of these VTP modes:
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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
13-2
Understanding the VTP Domain, page 13-2
Understanding VTP Modes, page 13-2
Understanding VTP Advertisements, page 13-3
Understanding VTP Version 2, page 13-3
Understanding VTP Pruning, page 13-4
Server—In VTP server mode, you can create, modify, and delete VLANs and specify other
configuration parameters (such as VTP version and VTP pruning) for the entire VTP domain. VTP
servers advertise their VLAN configuration to other network devices in the same VTP domain and
synchronize their VLAN configuration with other network devices based on advertisements received
over trunk links. VTP server is the default mode.
Client—VTP clients behave the same way as VTP servers, but you cannot create, change, or delete
VLANs on a VTP client.
Transparent—VTP transparent network devices do not participate in VTP. A VTP transparent
network device does not advertise its VLAN configuration and does not synchronize its VLAN
configuration based on received advertisements. However, in VTP version 2, transparent network
devices do forward VTP advertisements that they receive out their trunking LAN ports.
Chapter 13
Chapter 14, "Configuring VLANs."
Configuring VTP
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