Enabling Vtp Pruning - Cisco Catalyst 3750 Software Configuration Manual

Metro switch

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Configuring VTP

Enabling VTP Pruning

Pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic

must use to access the destination devices. You can only enable VTP pruning on a switch in VTP server

Beginning in privileged EXEC mode, follow these steps to enable VTP pruning in the VTP domain:

configure terminal

show vtp status

To disable VTP pruning, use the no vtp pruning global configuration command.

You can also enable VTP pruning by using the vlan database privileged EXEC command to enter VLAN

database configuration mode and entering the vtp pruning VLAN database configuration command. To

disable VTP pruning, use the no vtp pruning VLAN database configuration command. You can also

enable VTP version 2 by using the vtp pruning privileged EXEC command. However, this command

will not be available in future releases.

Pruning is supported with VTP version 1 and version 2. If you enable pruning on the VTP server, it is

enabled for the entire VTP domain.

Only VLANs included in the pruning-eligible list can be pruned. By default, VLANs 2 through 1001 are

pruning eligible on trunk ports. Reserved VLANs and extended-range VLANs cannot be pruned. To

change the pruning-eligible VLANs, see the

Catalyst 3750 Metro Switch Software Configuration Guide

Enter global configuration mode.

Enable pruning in the VTP administrative domain.

By default, pruning is disabled. You need to enable pruning on only one switch

in VTP server mode.

Return to privileged EXEC mode.

Verify your entries in the VTP Pruning Mode field of the display.

"Changing the Pruning-Eligible List" section on

Configuring VTP