Cisco Catalyst 4500 Series Administration Guide

16-7
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
OL_28731-01
Chapter 16 Configuring VLANs, VTP, and VMPS
VLAN Trunking Protocol
• Because Layer 3 ports and some software features require internal VLANs allocated from 1006 and
up, configure extended-range VLANs starting with 4094 and work downward.
• You can configure extended-range VLANs only in global configuration mode. You cannot configure
extended-range VLANs in VLAN database mode.
• Layer 3 ports and some software features use extended-range VLANs. If the VLAN you are trying
to create or modify is being used by a Layer 3 port or a software feature, the switch displays a
message and does not modify the VLAN configuration.
• When you create VLANs with the VLAN configuration command, they are automatically added to
the existing VTP domain; no action is required of the user.
This example shows how to create an Ethernet VLAN in global configuration mode and verify the
configuration:
Switch# configure terminal
Switch(config)# vlan 3
Switch(config-vlan)# end
Switch# show vlan id 3
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
3 VLAN0003 active
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
3 enet 100003 1500 - - - - - 0 0
Primary Secondary Type Interfaces
------- --------- ----------------- -------------------------------------------
Switch#
Assigning a Layer 2 LAN Interface to a VLAN
A VLAN created in a management domain remains unused until you assign one or more LAN interfaces
to the VLAN.
Note Make sure you assign LAN interfaces to a VLAN of the proper type. Assign Fast Ethernet, Gigabit
Ethernet, and 10-Gigabit Ethernet interfaces to Ethernet-type VLANs.
To assign one or more LAN interfaces to a VLAN, complete the procedures in the “Configuring Ethernet
Interfaces for Layer 2 Switching” section on page 18-5.
VLAN Trunking Protocol
This section describes the VLAN Trunking Protocol (VTP) on the Catalyst 4500 series switches, and
includes the following major subsections:
• About VTP, page 16-8
• VTP Configuration Guidelines and Restrictions, page 16-12
• VTP Default Configuration, page 16-13
• Configuring VTP, page 16-14

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E