Enabling Vtp Pruning - Cisco Catalyst 2950 Software Configuration Manual

Configuring VTP
Beginning in privileged EXEC mode, follow these steps to enable VTP version 2:
Command
Step 1 configure terminal
Step 2 vtp version 2
Step 3 end
Step 4 show vtp status
To disable VTP version 2, use the no vtp version global configuration command.
Note You can also enable VTP version 2 by using the vlan database privileged EXEC command to enter
VLAN configuration mode and entering the vtp v2-mode VLAN configuration command. To disable
VTP version 2, use the no vtp v2-mode VLAN configuration command.

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
mode.
Beginning in privileged EXEC mode, follow these steps to enable VTP pruning in the VTP domain:
Command
Step 1 configure terminal
Step 2 vtp pruning
Step 3
end
Step 4 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
Note
configuration mode and entering the vtp pruning VLAN configuration command. To disable VTP
pruning, use the no vtp pruning VLAN configuration command.
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. Extended-range VLANs cannot be pruned. To change the
pruning-eligible VLANs, see the
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
17-14
Purpose
Enter global configuration mode.
Enable VTP version 2 on the switch.
VTP version 2 is disabled by default on VTP version 2-capable switches.
Return to privileged EXEC mode.
Verify that VTP version 2 is enabled in the VTP V2 Mode field of the display.
Purpose
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 page
Chapter 17 Configuring VTP
16-20.
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