Cisco WS-C2980G-A Software Guide - Page 190
VTP Version 3 Per-Port Configuration, VTP Version 3 Domains, Modes, and Partitions, Primary Servers
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Understanding How VTP Version 3 Works Chapter 9 Configuring VTP • If a password is configured as hidden, using the hidden password configuration option, the following occurs: - The password does not appear in plain text in the configuration; the secret hexadecimal format of the password is saved in the configuration. - 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. For more information on configuring passwords, see the "Configuring VTP Version 3 Passwords" section on page 9-27. VTP Version 3 Per-Port Configuration Note With software release 8.1(1), all VTP versions can be configured on a per-port basis. 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 per-port configuration options, see the "Disabling VTP Version 3 on a Per-Port Basis" section on page 9-29. VTP Version 3 Domains, Modes, and Partitions The main differences between VTP version 3 domains and modes and VTP version 1 and VTP version 2 are as follows: • A VTP version 3 server can be configured as primary or secondary. • VTP version 3 modes (server, client, and transparent) are specific to a VTP instance. • A VTP version 3 domain can be partitioned. These features are described in detail in the following sections: • Primary Servers, Secondary Servers, and Clients, page 9-14 • Partitioned VTP Domains, page 9-15 • Reconfiguring a Partitioned VTP Domain, page 9-16 Primary Servers, Secondary Servers, and Clients In previous VTP implementations, the main VTP server characteristic was to be able to modify and store the VTP domain configuration in NVRAM. A VTP client could only receive the configuration from the network and could not save or modify it. The VTP version 3 primary server functions the same way as VTP version 1 and VTP version 2 servers. A VTP version 3 secondary server can store the configuration of the domain but cannot modify it. The concept of client is unchanged (see Figure 9-3). The main distinction in VTP version 3 is that the server, client, and transparent modes are specific to a VTP instance. For example, it is possible for a switch to be a primary server for one instance and a client for another instance. 9-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01