Cisco 7604 User Manual

13-5
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 13 Configuring VTP
VTP Default Configuration
Figure 13-2 Flooding Traffic with VTP Pruning
Enabling VTP pruning on a VTP server enables pruning for the entire management domain. VTP pruning
takes effect several seconds after you enable it. By default, VLANs 2 through 1000 are pruning eligible.
VTP pruning does not prune traffic from pruning-ineligible VLANs. VLAN 1 is always pruning
ineligible; traffic from VLAN 1 cannot be pruned.
To configure VTP pruning on a trunking LAN port, use the switchport trunk pruning vlan command
(see the “Configuring a Layer 2 Switching Port as a Trunk” section on page 10-8). VTP pruning operates
when a LAN port is trunking. You can set VLAN pruning eligibility when VTP pruning is enabled or
disabled for the VTP domain, when any given VLAN exists or not, and when the LAN port is currently
trunking or not.
VTP Default Configuration
Table 13-1 shows the default VTP configuration.
VTP Configuration Guidelines and Restrictions
When implementing VTP in your network, follow these guidelines and restrictions:
• Supervisor engine redundancy does not support nondefault VLAN data file names or locations. Do
not enter the vtp file file_name command on a router that has a redundant supervisor engine.
• Before installing a redundant supervisor engine, enter the no vtp file command to return to the
default configuration.
Switch 4
Switch 5
Switch 3Switch 6 Switch 1
Switch 2
Interface 1
Interface 2
Red
VLAN
31075
Interface 4
Interface 5
Flooded traffic
is pruned.
Table 13-1 VTP Default Configuration
Feature Default Value
VTP domain name Null
VTP mode Server
VTP version 2 enable state Version 2 is disabled
VTP password None
VTP pruning Disabled

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English