Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
vlan internal allocation policy
vlan internal allocation policy
To configure the internal VLAN allocation scheme, use the vlan internal allocation policy command.
To return to the default setting, use the no form of this command.
vlan internal allocation policy {ascending | descending}
no vlan internal allocation policy
Syntax Description
Defaults The default is the ascending allocation scheme.
Command Modes Global configuration mode
Command History
Usage Guidelines You can configure internal VLAN allocation to be from 1006 and up or from 4094 and down.
The internal VLANs and user-configured VLANs share the 1006 to 4094 VLAN spaces. A “first come,
first served” policy is used in allocating these spaces.
The vlan internal allocation policy command allows you to configure the allocation direction of the
internal VLAN.
During system bootup, the internal VLANs that are required for features in the startup-config file are
allocated first. The user-configured VLANs in the startup-config file are configured next. If you
configure a VLAN that conflicts with an existing internal VLAN, the VLAN that you configured is put
into a nonoperational status until the internal VLAN is freed and becomes available.
After you enter the write mem command and the system reloads, the reconfigured allocation scheme is
used by the port manager.
Examples This example shows how to configure the VLANs in a descending order as the internal VLAN allocation
policy:
Switch(config)# vlan internal allocation policy descending
Switch(config)#
Related Commands
ascending Specifies to allocate internal VLANs from 1006 to 4094.
descending Specifies to allocate internal VLANs from 4094 to 1006.
Release Modification
12.1(19)EW Support for this command was introduced on the Catalyst 4500 series switch.
Command Description
show vlan internal usage Displays information about the internal VLAN allocation.

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