Vtp Pruning And Spanning Tree Protocol; Vtpv3; Restrictions For Configuring The Vlan Trunking Protocol; Default Settings - Cisco Nexus 7000 Series Configuration Manual

VTP Pruning and Spanning Tree Protocol

VTP Pruning and Spanning Tree Protocol
VTP maintains a list of trunk ports in the Spanning Tree Protocol (STP) forwarding state by querying STP at
bootup and listening to the notifications that are generated by STP.
VTP sets a trunk port into the pruned or joined state by interacting with STP. STP notifies VTP when a trunk
port goes to the blocking or forwarding state. VTP notifies STP when a trunk port becomes pruned or joined.

VTPv3

VTP Version 3 (VTPv3) was introduced in Cisco NX-OS release 7.2(0) and has the following features:
• Provides interoperability with switches configured with VTP version 1 or 2.
• Allows only the primary server to make VTP configuration changes.
• Supports 4K VLANs.
• Permits feature-specific primary servers. A switch can be a primary server for a specific feature database
• Provides enhanced security with hidden and secret passwords.
• Provides interoperability with private VLANs (PVLAN). PVLANs and VTPs are no longer mutually
• Resolves the issue of VTP bombing. VTP bombing occurs when a server with a higher revision number

Restrictions for Configuring the VLAN Trunking Protocol

• You cannot manually configure VLANs on a device configured as a VTP client.
• PVLAN forward referencing is not supported with VTP.
• Administered VLANs are not displayed in the show output for all the VTP versions in the VTP client
VTP Version 3 has the following software restrictions:
• On the Cisco Nexus 7000 Series switches, by default, the VTP version 3 is configured under the server

Default Settings

This table lists the default settings for VTP parameters.
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.x
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like MST or for the entire VLAN database.
exclusive.
and a wrong VTP database is inserted into the VTP domain. This may occur when a new switch is
plugged into a stable VTP domain. The incorrect database is propagated to the domain and the earlier
stable database is overwritten.
and server mode.
mode. Whereas on the Cisco Nexus 9000 Series switches, by default, the VTP version 3 is configured
under the transparent mode.
Configuring VTP