Configuring Vtp Mode - Cisco Catalyst 3560-X Software Configuration Manual

Chapter 1 Configuring VTP
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Configuration Requirements
When you configure VTP, you must configure a trunk port so that the switch can send and receive VTP
advertisements to and from other switches in the domain.
For more information, see the
If you are configuring VTP on a cluster member switch to a VLAN, use the rcommand privileged EXEC
command to log in to the member switch. For more information about the command, see the command
reference for this release.
In VTP versions 1 and 2, when you configure extended-range VLANs on the switch, the switch must be
in VTP transparent mode. VTP version 3 also supports creating extended-range VLANs in client or
server mode.
VTP versions 1 and 2 do not support private VLANs. VTP version 3 does support private VLANs. If you
configure private VLANs, the switch must be in VTP transparent mode. When private VLANs are
configured on the switch, do not change the VTP mode from transparent to client or server mode.

Configuring VTP Mode

You can configure VTP mode as one of these:
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OL-25303-03
If there are TrBRF and TrCRF Token Ring networks in your environment, you must enable VTP
version 2 or version 3 for Token Ring VLAN switching to function properly. To run Token Ring and
Token Ring-Net, disable VTP version 2.
VTP version 1 and version 2 do not propagate configuration information for extended range VLANs
(VLANs 1006 to 4094). You must configure these VLANs manually on each device. VTP version 3
supports extended-range VLANs. You cannot convert from VTP version 3 to VTP version 2 if
extended VLANs are configured.
When a VTP version 3 device trunk port receives messages from a VTP version 2 device, it sends a
scaled-down version of the VLAN database on that particular trunk in VTP version 2 format. A VTP
version 3 device does not send VTP version 2-formatted packets on a trunk unless it first receives
VTP version 2 packets on that trunk port.
When a VTP version 3 device detects a VTP version 2 device on a trunk port, it continues to send
VTP version 3 packets, in addition to VTP version 2 packets, to allow both kinds of neighbors to
coexist on the same trunk.
A VTP version 3 device does not accept configuration information from a VTP version 2 or version
1 device.
Two VTP version 3 regions can only communicate in transparent mode over a VTP version 1 or
version 2 region.
Devices that are only VTP version 1 capable cannot interoperate with VTP version 3 devices.
When a switch is in VTP server mode, you can change the VLAN configuration and have it
propagated throughout the network.
When a switch is in VTP client mode, you cannot change its VLAN configuration. The client switch
receives VTP updates from a VTP server in the VTP domain and then modifies its configuration
accordingly.
"Configuring VLAN Trunks" section on page
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Configuring VTP
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