Vlan Internal Allocation Policy - Cisco Catalyst 4500 Series Configuration Manual

Chapter 2

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.
Syntax Description
ascending
descending
Command Default The default is the ascending allocation scheme.
Command Modes
Global configuration mode
Command History Release
12.1(19)EW
You can configure internal VLAN allocation to be from 1006 and up or from 4094 and down.
Usage Guidelines
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
The following 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 Command
show vlan internal usage
vlan internal allocation policy {ascending | descending}
no vlan internal allocation policy
Specifies to allocate internal VLANs from 1006 to 4094.
Specifies to allocate internal VLANs from 4094 to 1006.
Modification
This command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
Description
Displays information about the internal VLAN allocation.
vlan internal allocation policy
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