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Understanding How VTP Version 3 Works
For more information on configuring the passwords, see the
section on page
VTP Version 3 Per-Port Configuration
With software release 8.1(1), all VTP versions can be configured on a per-port basis.
Note
VTP version 3 allows you to disable the protocol on a per-port basis. If a trunk is connected to a switch
or server that is not trusted and is not supposed to interact with the VTP domain, it is now possible to
drop incoming VTP packets and prevent VTP advertisements on a particular trunk. This configuration
option has no impact on other protocols.
For more information on the per-port configuration options, see the
Per-Port Basis" section on page
VTP Version 3 Domains, Modes, and Partitions
This section describes how the domains, modes, and partitions are handled in VTP version 3 as compared
to VTP versions 2 and 3:
•
•
•
For more information about these features, see these sections:
•
•
•
Primary Servers, Secondary Servers, and Clients
In previous VTP implementations, the VTP server could modify and store the VTP domain configuration
in NVRAM, and a VTP client could only receive the configuration from the network and could not save
or modify it.
In VTP version 3, the primary server functions the same way as the VTP version 1 and version 2 servers,
and the secondary server can store the configuration of the domain but cannot modify it. The concept of
client is unchanged in VTP version 3 (see
the server, client, and transparent modes are specific to a VTP instance. For example, in VTP version 3,
it is possible for a switch to be a primary server for one instance and a client for another instance.
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
10-14
If you try to configure the switch as a primary server, you are prompted for the password. If your
–
password matches the secret password, the switch becomes a primary server allowing you to
configure the domain.
10-26.
A VTP version 3 server can be configured as primary or secondary.
The VTP version 3 modes (server, client, and transparent) are specific to a VTP instance.
A VTP version 3 domain can be partitioned.
Primary Servers, Secondary Servers, and Clients, page 10-14
Partitioned VTP Domains, page 10-15
Reconfiguring a Partitioned VTP Domain, page 10-16
10-28.
Figure
10-3). The main distinction in VTP version 3 is that
Chapter 10
"Configuring VTP Version 3 Passwords"
"Disabling VTP Version 3 on a
Configuring VTP
OL-8978-04
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