VTP is a Layer 2 messaging
protocol that maintains VLAN consistency by managing the addition, deletion,
and renaming of VLANs within a VTP domain. A VTP domain is made up of one or
more network devices that share the same VTP domain name and that are connected
with trunk interfaces. Each network device can be in only one VTP domain.
Layer 2 trunk interfaces,
Layer 2 port channels, and virtual port channels (vPCs) support VTP
The VTP is disabled by default on the device. You can enable and configure VTP using
the command-line interface (CLI). When VTP is disabled, the device does not
relay any VTP protocol packets.
For information about enabling and configuring VTP,
『Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide』.
Before Release 5.1(1), VTP worked only in
transparent mode in the Cisco Nexus 7000 Series devices, allowing you to extend a VTP domain across the device.
When the device is in the VTP
transparent mode, the device relays all VTP protocol packets that it receives on a
trunk port to all other trunk ports. When you create or modify a VLAN that is
in VTP transparent mode, those VLAN changes affect only the local device. A VTP
transparent network device does not advertise its VLAN configuration and does
not synchronize its VLAN configuration based on received advertisements.
VLAN 1 is required on all trunk ports used for switch interconnects if VTP is supported in the network. Disabling VLAN 1 from any of these ports prevents VTP from functioning properly.
If you enable VTP, you must configure either version
1 or version 2. If you are using VTP in a Token Ring environment, you must use